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Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
OAV® AIR BUSHINGS �������������������������������������������������������������������������������������������� 4
CASE STUDIES ������������������������������������������������������������������������������������������������������� 6
OAV® TAPERED-ROLLER AIR BEARINGS �������������������������������������������������������������� 8
OAV® X- SPIN TAPERED AIR BEARINGS ������������������������������������������������������������ 10
OAV® LINEAR AIR BEARINGS ����������������������������������������������������������������������������� 12
CASE STUDIES ����������������������������������������������������������������������������������������������������� 13
CASE STUDIES ����������������������������������������������������������������������������������������������������� 15
OAV® ROLL TO ROLL AIR BEARINGS������������������������������������������������������������������ 16
OAV® X- SPIN ROLLER AIR BEARINGS��������������������������������������������������������������� 17
OAV® FLAT RECTANGULAR AIR BEARINGS ������������������������������������������������������ 18
OAV® VACUUM PRELOADED AIR BEARINGS���������������������������������������������������� 19
OAV® FLAT ROUND AIR BEARINGS������������������������������������������������������������������� 20
OAV® ROLLER AIR BEARINGS ����������������������������������������������������������������������������� 24
OAV® THRUST AIR BEARING AND BUSHINGS��������������������������������������������������� 25
OAV® MODULAR AIR BEARINGS ������������������������������������������������������������������������ 26
OAV® EPOXY BONDED AIR BEARINGS�������������������������������������������������������������� 27
OAV® TEMPERATURE CONTROLLED AIR BEARINGS ���������������������������������������� 28 TABLE OF CONTENTS
OAV® FOIL BEARINGS����������������������������������������������������������������������������������������� 29
Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
We believe in promoting innovation and entrepreneurial ideas both within OAV and in conjunction with our
clients. We encourage collaboration and are willing to partner with our clients to promote new ideas, new processes, and new products.
Innovation is best served by collaboration. Innovation is a process that involves multiple exercises in the attempt
to develop and design new systems and products to better accomplish a given task.
Markets are primarily responsive to profitability and quality. Innovation is essential to one’s ability to remain on
the multi-dimensional cutting edge in relation to cost containment (and profitability), quality (a better mousetrap
must be designed to outperform the old one), productivity (responding to the need to increase production and
decrease the time required without sacrificing quality), and enhancing durability (so as to maintain quality over
time thereby reducing replacement, reducing down time, and reducing associated labor costs.)
OAV is committed to developing human and technological resources to do things differently in order to increase
productivity.
For a business or an organization to develop a competitive advantage, it must be able to adapt to changing
trends and new technologies. One can develop an advantage through new technology, improving quality, enhancing durability, or reducing costs. Ideally, innovation fosters improvements in all dimensions.
Example of Industries that use OAV Air Bearings for disruptive innovation
Metrology
Automotive Industry
Optomechanics
Semiconductor Industry
Aerospace Industry
Energy Industry
Medical Industry
Audio Industry
With those explanations in hand, the theory of disruptive innovation went beyond simple correlation to a philosophy of causation as well. The critical components of that have been tested and validated through many industries.
INNOVATION
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沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
OAV® AIR BUSHINGS
The OAV® Air Bushing is designed to make air bearings available for use with both
pre-existing and existing designs based on round shaft guides. These components run
on precision shafts, and are available in Metric or English sizes. OAV® provides an option
to use other special materials to maximize stiffness and load capacity.
We provide designs that are integrated into your product and we can quickly develop a design based on the application or specific requirements. We
provide detailed drawings and 3-D CAD models, and can analyze complex
issues associated with applications from nanometer accuracy positioning to
standard calculations.
CUSTOM DESIGN
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沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
SIZE 0.250 Inch ID 0.312 Inch ID 0.375 Inch ID 0.500 Inch ID 0.750 Inch ID
Part Number OAV0250IB OAV0312IB OAV0375IB OAV0500IB OAV0750IB
Housing Material/Finish 7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
Input Pressure 20 psi - 100 max psi
(0.13 MPa to 0.68 MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68
MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68
MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68
MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68 MPa)
Porous Material Carbon Carbon Carbon Carbon Carbon
Pressure Port Threads M3 X 0.5 M3 X 0.5 M3 X 0.5 M3 X 0.5 M3 X 0.5
Lifetime Infinite Infinite Infinite Infinite Infinite
Radial Load Max 2.9 lbs (13.1 N) 4.4 lbs (19.4) 4.4lbs (19.8 N) 9.5 lbs (42.3 N) 34.4 lbs (153.0 N)
Radial Stiffness 0.01 lbs/ μ in (2 N/ µm) .039lbs/μ in
(7 N/μ m)
.04lbs/μ in (7 N/μ m) 0.06 lbs/μ in
(11 N/μ m)
0.13 lbs/μ in
(23 N/μ m)
Pitch Moment Max 0.125 lbs-in (0.013 N-m) 2.74 lbs-in (.28 N-m) 2.75 lbs-in (.29 N-m) 7.5 lbs-in (0.8 N-m) 10 lbs-in (1.1 N-m)
Bushing Inside
Diameter (ID)
0.2507 in + .0002 /
- .0000 in
0.3125 in +. 0002 / -
.0000 in
0.3757 in + .0002 /
- .0000 in
0.5007 in +.0002 /
- .0000 in
0.7507 in +.0002 /
- .0000 in
Bushing Outside
Diameter (OD)
0.634 in + .005 /
- .000 in
0.634 in +.005 /
- .000 in
0.634 in + .005 /
- .000 in
0.932 in +.005 /
- .000 in
1.250 in +.005 /
- .000 in
Bushing Length 1.250 in 1.25 in 1.25 in 2.000 in 2.000 in
Bushing Weigth 9.80 g 8.7 g 8.8 g 33.9 g 51.6 g
Recommended Shaft
Outside Diameter (OD)
0.2500 in + .0000 /
- .0007 in (g6)
0.3125 in +.0000 /
- .0007 in (g6)
0.37500 in + .0000 /
- .0007in (g6)
0.5000 in +.0000/
-.0007in (g6)
0.7500 in +.0000/
-.0007in (g6)
Flow Rate 3 SCFH 4.40 SCFH 4.50 SCFH 5.98 SCFH 8.98 SCFH
Housing Bore size
O- Ring Method
.661 in + .005 /
- .000 in
.661 in + .005 /
- .000 in
.661 in + .005 /
- .000 in
0.947 in + .000 /
- .005 in
1.265 in + .000 /
- .005 in
Housing Bore size
Light Press Fit Method
.635 in + .000 /
- .001 in
.635 in + .000 /
- .001 in
.635 in + .000 /
- .001 in
.908 in +.000 /
- .001 in
1.251 in + .000 /
- .001 in
SIZE 1.00 Inch ID 1.50 Inch ID 2.00 Inch ID 3.00 Inch ID
Part Number OAV1000IB OAV1500IB OAV2000IB OAV3000IB
Housing Material/Finish 7075 Aircraft Quality Aluminum/
Mil Spec Hard Anodize
7075 Aircraft QualityAluminum/
Mil Spec Hard Anodize
7075 Aircraft QualityAluminum/Mil
Spec Hard Anodize
7075 Aircraft QualityAluminum/Mil
Spec Hard Anodize
Input Pressure 20 psi - 100 max psi (0.13 MPa
to 0.68 MPa)
20 psi - 100 max psi (0.13
MPa to 0.68 MPa)
20 psi - 100 max psi (0.13 MPa to
0.68 MPa)
20 psi - 100 max psi (0.13 MPa
to 0.68 MPa)
Porous Material Carbon Carbon Carbon Carbon
Pressure Port Threads M3 X 0.5 M3 X 0.5 M3 X 0.5 M3 X 0.5
Lifetime Infinite Infinite Infinite Infinite
Radial Load Max 51.6 lbs (229.5 N) 126.2 lbs (561.4 N) 198.0 lbs (880.8 N) 298.0 lbs (1325.6 N)
Radial Stiffness 0.19 lbs/μ in (34 N/μ m) 0.41 lbs/μ in (72 N/μ m) 0.63 lbs/μ in (110 N/μ m) 0.91 lbs/μ in (159 N/μ m)
Pitch Moment Max 17 lbs-in (1.9 N-m) 28 lbs-in (3.1 N-m) 46 lbs-in (5.2 N-m) 63 lbs-in (7.1 N-m)
Bushing (ID) 1.0007 in + .0002 / - .0000 in 1.5007 in + .0002 / - .0000 in 2.0007 in + .0002 / - .0000 in 3.0007 in + . 0002 / - .0000 in
Bushing (OD) 1.532 in +.005 / - .000 in 2.346 in + .005 / - .000 in 2.918 in + .005 / - .000 in 3.917 in + .005 / - .000 in
Bushing Length 2.250 in 3.000 in 3.500 in 3.500 in
Bushing Weigth 79.5 g 266.0 g 446.4 g 620.2 g
Recommended Shaft
Outside Diameter (OD)
1.0000 in + .0000 / - .0007 in (g6) 1.5000 in +c.0000 / - .0007 in
(g6)
2.0000 in + .0000 / - .0007 in (g6) 3.0000 in + .0000 / - .0007 in (g6)
Flow Rate 11.97 SCFH 17.96 SCFH 23.94 SCFH 35.92 SCFH
Housing Bore size
O- Ring Method
1.547 in + .000 / - .005 in 2.361 in + .000 / - .005 in 2.933 in + .000 / - .005 in 3.953 in + .000 / - .005 in
Housing Bore size Light Press
Fit Method
1.533 in + .000 / - .001 in 2.347 in + .000 / - .001 in 2.920 in + .000 / - .0013 in 3.918 in + .000 / - .0015 in
Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
OAV® AIR BUSHINGS
CASE STUDIES
Breaking Waves of Progress: Experimental Testing of Wave Energy Converters equipped
with OAV Air Bushings
Wave energy is a renewable form of energy which is largely untapped. Wave energy converters
(WECs) are devices designed to harness this energy source and convert it to electricity. The last
decades a considerable effort has been made by industry and academia to bring WECs to a
commercial stage. There is a need for available real-life data to validate numerical models in the wave energy
sector. However, publicly available databases from WEC array experiments are limited due to the high cost
and complexity of conducting such experiments. The ‘WECfarm’ project, initiated by Ghent University, aims to
improve the understanding of interactions between the individual WECs within an array, and address the need
for experimental data on WEC array tests. A team from the Coastal Engineering Research Group of Ghent
University, Belgium performed experiments focused on the extraction of wave energy using an array of five
point absorber WECs. Similar to offshore wind turbines, multiple point absorber WECs will be installed in an
array configuration, to increase the total capacity, and to benefit from the economies of scale. Whereas wind
turbines always interact destructively due to wake effects, WECs can interact constructively, since hydrodynamic interactions between the WECs occur through radiation and diffraction of waves, changing the direction of
the incoming wave energy.
The point-absorber ‘WECfarm’ WEC consists of a floating buoy to capture energy from waves coming from different directions. The WECs are equipped with a permanent magnet synchronous motor (PMSM), addressing
the need for WEC array tests with an accurate and actively controllable Power Take-Off (PTO). The WEC array
control and data acquisition are realized with a Speedgoat real-time target machine, offering the possibility to
implement advanced WEC array control strategies in the MATLAB-Simulink environment.
The team emphasized the significance of OAV Air Bushings in the context of WECs to exclude unwanted
friction in the linear guiding system. The surge wave excitation force yields a moment on the linear guiding
system. This moment can be decoupled in normal forces by a configuration of three air bushings. The air
bushings are characterized by a load versus pressure curve, where one 40 mm OAV air bushing can cope with
a maximum radial load of 720 N, for a nominal pressure of 5.5 bar. A configuration of three OAV 40 mm air
bushings guarantees a permanent layer of air between the guide shafts and the bushings for the most extreme
wave conditions, resulting in zero-friction linear guiding on the condition of a proper alignment. To obtain the
air gap, a compressor with a two-stage air filter supplies these air bushings with clean and dry air under a nominal pressure of 5.5 bar. The OAV 40 mm air bushings require a shaft’s outside diameter of 40.00 mm +0.00/-
0.02 mm (tolerance class g6). Figure 1 shows a rendering of a single ‘WECfarm’ WEC, and Figure 2 shows a
schematic of the data acquisition and control flow.
The OAV Air Bushings are pivotal components in the design of the ‘WECfarm’ WEC, as the experiments target
high quality data with low uncertainties. The air bushings exclude the variability in mechanical losses and energy dissipation associated with traditional bearing systems, as for example ball or plain bearings. Additionally,
the use of air bushings enhance the controllability and responsiveness of the WEC system, allowing for more
precise and efficient power capture from the waves. The team opted for OAV air bushings due to superior
pricing, quality, and technical support during the project.
The experimental setup was tested in the Coastal & Ocean Basin Ostend, Belgium, which is a wave basin with an L-shaped
wavemaker of 20 by 20 m. Figure 3 and 4 show the experimental setup of the five-WEC array at the wave basin. To maximize
power absorption, a control system tailored to the WEC array
needs to be implemented. Control strategies aim to achieve
resonance by altering the dynamics of the WEC system, as
most power is produced during resonant absorption. The research team investigated how the WEC array layout should
be optimized simultaneously with the applied control strategy
to maximize the power absorption. System identification tests
were executed to obtain an accurate dynamic model of the
WEC array. Proportional (resistive) and Proportional-Integral
(reactive) controllers were designed and tested accordingly.
Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
SIZE 6 mm ID 8 mm ID 10 mm ID 13 mm ID
Part Number OAV006MB OAV008MB OAV010MB OAV013MB
Housing Material/
Finish
7075 Aircraft Quality Aluminum/Mil Spec Hard Anodize
7075 Aircraft Quality Aluminum/Mil Spec Hard Anodize
7075 Aircraft Quality Aluminum/Mil Spec Hard Anodize
7075 Aircraft Quality Aluminum/Mil Spec Hard Anodize
Input Pressure .28 Mpa to .68 Mpa
(40 to 100 PSI)
.28 Mpa to .68 max Mpa .28 Mpa to .68
max Mpa
40 psi - 100
max psi
Porous Material Carbon Carbon Carbon Carbon
Pressure Port Threads M3 X 0.5 M3 X 0.5 M3 x 0.5 M3 x 0.5
Lifetime Infinite Infinite Infinite Infinite
Radial Load Max 12.4 N (2.8 lbs) 19.4 N (4.4 lbs) 20.6 N (4.6 lbs) 42.5 N (9.6 lbs)
Radial Stiffness 2 N/μm (0.01 lbs/μin) 7 N/μm (0.039 lbs/μin) 7 N/μm (0.04 lbs/μin) 11 N/μm (.06 lbs/μin)
Pitch Moment Max 0.013 N-m (.125 lbs-in) 0.28 N-m (2.74 lbs-in) 0.29 N-m (2.75 lbs-in) 0.8 N-m (7.5 lbs-in)
Bushing (ID) 6.018 mm + .005/-.000 8.018 mm + .005/-.000 10.018 mm + .005/-.000 13.018 mm + .005/-.000
Bushing (OD) 16.10 mm + .13/-.00 16.10 mm + .13/-.00 16.10 mm + .13/-.00 23.67 mm + .13/-.00
Bushing Length 31.75 mm 31.75 mm 31.75 mm 50.80 mm
Bushing Weigth 8.6 g 8.7 g 8.6 g 32.5 g
Recommended Shaft
(OD)
6.00 mm + .00/-.02 (g6) 8.00 mm + .00/-.02 (g6) 10.00 mm + .00/-.02 (g6) 13 mm + .00/-.02 (g6)
Flow Rate 2.84 SCFH 4.40 SCFH 4.70 SCFH 6.12 SCFH
Housing Bore size
O- Ring Method
16.790 mm + .127/-.000 16.790 mm + .127/-.000 16.79 mm + .127/-.000 24.05 mm + .000/-.127
Housing Bore size
Light Press Fit Method
16.125 mm + .000/-.025 125 mm + .000/-.025 16.125 mm + .000/-.025 23.070 mm + .000/-.025
20 mm ID 25 mm ID 40 mm ID 50 mm ID 75 mm ID 90 mm ID
OAV020MB OAV025MB OAV040MB OAV050MB OAV075MB OAV090MB
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
.28 Mpa to .68 max
Mpa (40 psi to 100 psi)
.28 Mpa to .68 max
Mpa (40 psi to 100 psi)
.28 Mpa to .68 max
Mpa (40 psi to 100 psi)
.28 Mpa to .68 max
Mpa ( 40 psi to 100 psi
.28 Mpa to .68 max
Mpa (40 psi to 100 psi)
.28 Mpa to .68 max
Mpa (40 psi to 100 psi)
Carbon Carbon Carbon Carbon Carbon Carbon
M3 x 0.5 M3 x 0.5 M5 x 0.8 M5 x 0.8 M5 x 0.8 M5 x 0.8
Infinite Infinite Infinite Infinite Infinite Infinite
160 N (36.0 lbs) 226.3 N (50.9 lbs) 593.8 N (133.5 lbs) 866.3 N (194.8 lbs) 1300.0 N (292.3 lbs) 2000 N (449.6 lbs)
23 N/μm (0.13 lbs/μin) 34 N/μm (0.19 lbs/μin) 72 N/μm (0.41 lbs/μin) 110 N/μm (0.63 lbs/μin) 159 N/μm (0.91 lbs/μin) 245 N/μm
1.1 N-m (10 lbs-in) 1.9 N-m (17 lbs-in) 3.1 N-m (28 lbs-in) 5.2 N-m (46 lbs-in) 7.1 N-m (63 lbs-in) 8.9 N-m
20.018 mm + .005/-
.000
25.018 mm + .005/-
.000
40.018 mm + .005/-.00 50.018 mm + .005/-
.000
75.018 mm + .005/-.000 90.018 mm + .005/-
.000
31.75 mm + .13/-.00 38.91 mm + .13/-.00 59.59 mm + .13/-.00 74.12 mm + .13/-.00 99.49 mm + .13/-.00 113.25 mm
50.80 mm 57.15 mm 76.20 mm 88.90 mm 88.90 mm 110 mm
49.1 g 72.0 g 249.1 g 443.0 g 688.1 g 907.9 g
20.00 mm + .00/-.02
(g6)
25.00 mm +.00/-.02
(g6)
40.00 mm + .00/-.02
(g6)
50.00 mm + .00/-.02
(g6)
75.00 mm + .00/-.02 (g6) 90.00 mm + .00/-.02
(g6)
9.42 SCFH 11.78 SCFH 18.85 SCFH 23.57 SCFH 35.42 SCFH 52.5 SCFH
32.130 mm + .000/-
.127
39.290 mm + .000/-
.127
59.97 mm + .000/-.127 74.50 mm + .000/-.127 100.4 mm + .000/-.127 113.9 mm + 0/-.127
31.780 mm + .000/-
.025
38.935 mm + .000/-
.025
59.630 mm + .000/-
.025
74.150 mm + .000/-
.035
99.525 mm + .000/-.040 113.28 mm + 0/-.035
Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
OAV® TAPERED-ROLLER AIR BEARINGS
The tapered bearing is one of the most commonly used forms of roller bearings in many industries. OAV is
proud to be the first to introduce the Tapered Roller Air Bearing. Consisting of two main components - the
inner assembly and the outer-cage, they are typically mounted in opposing pairs on a shaft. Air supply
is sent through the shaft with a cross-hole or inlet from the outer-cage. The OAV Tapered Roller Air Bearing
has standard sizes available up to a 75 mm ID outer-cage spin or inner-race spin with options.
Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
Size 40 mm ID 50 mm ID 75 mm ID
Part Number OAV-TPR40M OAV-TPR50M OAV-TPR75M
Housing Material/Finish 7075 Aircraft Quality Aluminum/
Mil Spec Hard Anodize
7075 Aircraft Quality Aluminum/
Mil Spec Hard Anodize
7075 Aircraft Quality Aluminum/
Mil Spec Hard Anodize
Porous Material Carbon Carbon Carbon
Input Pressure 20 psi - 100 max psi (0.13 MPa
to 0.68 MPa)
20 psi - 100 max psi (0.13 MPa to
0.68 MPa)
20 psi - 100 max psi (0.13 MPa
to 0.68 MPa)
Pressure Port Threads M3 x 0.8 M3 x 0.8 M5 x 0.8
Radial Stiffness 0.41 lb/μ in (72 N/µm) 0.56 lb/μin (98 N/µm) 0.97 lb/μ in (170 N/µ m)
Pitch Moment Max 27.4 lbs-in (3.1 N-m) 33.6 lbs-in (3.8 N-m) 62.8 lbs-in (7.1 N-m)
Radial Load Max 116.6 lbs (518.9 N) 179.5 lbs (798.8 N) 333.6 lbs (1484.5 N)
Axial Load Max 70 lbs (311.5 N) 107.7 lbs (479.3 N) 200.1 lbs (890.4 N)
Total Indicated Runout (TIR) ± 1 millionths in (.025 µm) ± 1 millionths in (.025 µm) ± 1 millionths in (.025 µm)
Axial and Radial Error Motion .9 μin/0.023 (µm) .9 μin/(0.023 µm) .9 μin/(0.023 µm)
Bearings Inside Diameter (ID) 40 mm + .013/-.00 50 mm + .013/-.00 75 mm +.013/-.00
Bearing Outside Diameter (OD) 90 mm + .00/-.013 100 mm + .00/-.013 148 mm +.00/-.013
Bearing Width 19 mm 24 mm 29 mm
Weight 0.5 lb (230 g) 0.76 lb (345 g) 2.02 lb (916 gram)
Shaft Diameter 40 mm 50 mm 75 mm
Housing Bore size Light Press Fit
Method
90 mm + .013/-.00 100 mm + .013/-.00 148 mm +.013/-.00
Flow rate 9.23 SCFH 14.21 SCFH 26.4 SCFH
Size 13 mm ID 20 mm ID 25 mm ID
Part Number OAV-TPR13M OAV-TPR20M OAV-TPR25M
Housing Material/Finish 7075 Aircraft Quality Aluminum/
Mil Spec Hard Anodize
7075 Aircraft Quality Aluminum/
Mil Spec Hard Anodize
7075 Aircraft Quality Aluminum/
Mil Spec Hard Anodize
Porous Material Carbon Carbon Carbon
Input Pressure 20 psi - 100 max psi (0.13 MPa
to 0.68 MPa)
20 psi - 100 max psi (0.13 MPa
to 0.68 MPa)
20 psi - 100 max psi (0.13 MPa
to 0.68 MPa)
Pressure Port Threads M3 x 0.8 M3 x 0.8 M5 x 0.8
Radial Stiffness 0.06 lb/μ in (10.7 N/μ m) 0.15 lb/μ in (26 N/μ m) 64 N/μm
Pitch Moment Max 4.4 lbs-in (0.5 N-m) 14.16 lbs-in (1.6 N-m) 2.8 N-m
Radial Load Max 20.7 lbs (92.08 N) 34.5 lbs (153.46 N) 71.5 lbs
Axial Load Max 12.4 lbs (55.16 N) 20.7 lbs (92.08 N) 42.9 lbs
Total Indicated Runout (TIR) ± 1 millionths in (.025 µm) ± 1 millionths in (.025 µm) ± 1 millionths in (.025 µm)
Axial and Radial Error Motion .9 μin/0.023 (µm) .9 μin / 0.023 (µm) .9 μin/0.023 (µm)
Bearings Inside Diameter (ID) 13 mm + .013/-.00 20 mm + .013/-.00 25 mm + .013/-.00
Bearing Outside Diameter (OD) 53 mm + .00/-.013 70 mm + .00/-.013 70 mm + .00/-.013
Bearing Width 13 mm 15 mm 15 mm
Weight .148 lb (67 g) 0.28 lb (127.0 g) .28 lb (127 g)
Shaft Diameter 13 mm 20 mm 25 mm
Housing Bore size Light Press Fit
Method
53 mm + .0013/-.013 70 mm + .013/-.00 70 mm + .013/-.00
Flow rate 3.68 SCFH 5.22 SCFH 5.66 SCFH
Web: https://www.rstbearing.com.cn
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沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
OAV® X-SPIN TAPERED-ROLLER
AIR BEARINGS MX
Web: https://www.rstbearing.com.cn
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沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
Size 13 mm ID 20 mm ID 25 mm ID
Part Number OAV-TPR13MX OAV-TPR20MX OAV-TPR25MX
Housing Material/Finish 7075 Aircraft Quality Aluminum/Mil Spec Hard Anodize
7075 Aircraft Quality Aluminum/Mil Spec Hard Anodize
7075 Aircraft Quality Aluminum/Mil Spec Hard Anodize
Side Material/Finish 7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
Porous Material Carbon Carbon Carbon
Input Pressure 20 psi - 100 max psi (0.13 MPa to
0.68 MPa)
20 psi - 100 max psi (0.13 MPa to
0.68 MPa)
20 psi - 100 max psi (0.13 MPa to
0.68 MPa)
Pressure Port Threads Through Shaft Cross-Hole Through Shaft Cross-Hole Through Shaft Cross-hole
Radial Stiffness 0.12 lb/μ in (21 N/μ m) 0.19 lb/μ in (33 N/μ m) 0.35 lb/μ in (62 N/µm)
Pitch Moment Max 8 lbs-in (0.9 N-m) 17.7 lbs-in (2.0 N-m) 23 lbs-in (2.6 N-m)
Radial Load Max 43.2 lbs (192.2 N) 63.8 lbs (283.9 N) 68.2 lbs (303.5 N)
Axial Load Max 25 lbs (111.3 N) 38.3 lbs (170.4 N) 40.9 lbs (182.0 N)
Total Indicated Runout (TIR) ± 1 millionths in (.025 µm) ± 1 millionths in (.025 µm) ± 1 millionths in (.025 µm)
Axial and Radial Error Motion .9 μin/0.023 (µm) .9 μin / 0.023 (µm) .9 μin/0.023 (µm)
Bearings Inside Diameter (ID) 13 mm + .013/-.00 20 mm + .013/-.00 25 mm + .01/-.00
Bearing Outside Diameter (OD) 53 mm + .00/-.013 70 mm + .00/-.013 70 mm + .00/-.013
Bearing Width 13 mm 12 mm 15 mm
Weight .13 lb (37 g) 0.28 lb (127.0 g) .27 lb (121 g)
Shaft Diameter 13 mm 20 mm 25 mm
Housing Bore size Light Press Fit Method 53 mm + .013/-.00 70 mm + .013/-.00 44.48 mm + .02/-.00
Flow rate 3.42 SCFH 5.04 SCFH 5.39 SCFH
Size 40 mm ID 50 mm ID 75 mm ID
Part Number OAV-TPR40MX OAV-TPR50MX OAV-TPR75MX
Housing Material/Finish 7075 Aircraft Quality Aluminum/Mil Spec Hard Anodize
7075 Aircraft Quality Aluminum/Mil Spec Hard Anodize
7075 Aircraft Quality Aluminum/Mil Spec Hard Anodize
Porous Material Carbon Carbon Carbon
Input Pressure 20 psi - 100 max psi (0.13 MPa to
0.68 MPa)
20 psi - 100 max psi (0.13 MPa to
0.68 MPa)
20 psi - 100 max psi (0.13 MPa to
0.68 MPa)
Pressure Port Threads Through Shaft Cross-Hole Through Shaft Cross-Hole Through Shaft Cross-Hole
Radial Stiffness 0.39 lb/μ in (68 N/µ m) 0.55 lb/μ in (96 N/µ m) 0.96 lb/μ in (168 N/μ m)
Pitch Moment Max 25.7 lbs-in (2.9 N-m) 32.7 lbs-in (3.7 N-m) 59.3 lbs-in (6.7 N-m)
Radial Load Max 108.7 lbs (483.7 N) 174.7 lbs (777.4 N) 324 lbs (1441.8 N)
Axial Load Max 65.2 lbs (290.1 N) 104.8 lbs (466.4 N) 194.4 lbs (865.1 N)
Total Indicated Runout (TIR) ± 1 millionths in (.025 µm) ± 1 millionths in (.025 µm) ± 1 millionths in (.025 µm)
Axial and Radial Error Motion .9 μin/0.023 (µm) .9 μin/(0.023 µm) .9 μin/(0.023 µm)
Bearings Inside Diameter (ID) 40 mm + .013/-.00 50 mm + .013/-.00 75 mm +.013/-.00
Bearing Outside Diameter (OD) 90 mm + .00/-.013 100 mm + .00/-.013 148 mm +.00/-.013
Bearing Width 19 mm 24 mm 29 mm
Weight 0.5 lb (230 g) 0.74 lb (336 g) 2.02 lb (916 gram)
Shaft Diameter 40 mm 50 mm 75 mm
Housing Bore size Light Press Fit
Method
90 mm + .013/-.00 100 mm + .013/-.00 148 mm +.013/-.00
Flow rate 8.6 SCFH 13.83 SCFH 25.6 SCFH
Web: https://www.rstbearing.com.cn
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沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
OAV® LINEAR AIR BEARING GUIDES
SIZES AND SPECIFICATIONS
Part Number DOV150150 DOV150300
Local Straightness .25 µm per 25 mm t
ravel
.25 µm per 25 mm
travel
Maximum error 2 µm per 1000 mm
travel
2 µm per 1000 mm
travel
Flatness .0005 mm or .00002 in .0005 mm or .00002 in
Carriage Size 150 mm x 150 mm 150 mm x 300 mm
Travel 50 mm/100 mm/200 mm/300 mm or Custom Travel 50 mm/100 mm/200 mm/300 mm or Custom Travel
Guidebar Length Custom Custom
Assembly Height 55 mm 55 mm
Carriage Weight 1.3 kg (2.8 lb) 2.6 kg (2.7 lb)
Total Weight 1.95 kg (4.2 lb) (100 mm travel) 3.89 kg (8.5 lb) (200 mm travel)
Z direction Load 352 lb (1565 N) 704 lb (3130 N)
Y direction Load 304 lb (1352 N) 608 lb (2704 N)
Air Flow 17 NLPM 23 NLPM
Pitch 285 lbs-in (32 N-m) 950 lbs-in (107 N-m)
Roll 324 lbs-in (37 N-m) 990 lbs-in (112 N-m
Yaw 140 lbs-in (16 N-m) 396 lbs-in (45 N-m)
Y Stiffness 670 N/μ 1609 N/μ
Z Stiffness 730 N/μ 2176 N/μ
OAV Profile Rail Guides consist of next generation OAV technology and is manufactured
using aerospace quality material. OAV Air Bearing Guides include the Box Series, T-Series,
U-Series, and the Dovetail Series. OAV Air Bearings offers a wide range of styles, sizes and
unique features produced for easy retrofitting into both new and existing applications.
Standard OAV Air Bearing Guide Tolerances
Local Straightness: .25 µ per 25 mm travel with a maximum error of 2 µ per 1000 mm travel
Flatness: .0005 mm or .00002 in
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沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
Precision of Tribometer Testing on Laboratory-Grown Dendritic Snow for Evaluating Cross-Country
Ski Performance.
Tribometers play a crucial role in measuring friction and wear. A full-scale ski-snow tribometer was developed by the Department of Civil and Environmental Engineering at the Norwegian University of Science
and Technology to test ski-snow friction with greater precision using the OAV Dovetail Linear Air Bearing.
The precision of the tribometer varied based on snow type, speed, and surface preparation.
International ban on fluorine-containing waxes and ski bases has led to increased research on minimizing ski-snow friction.
Despite this, quantifying ski-snow friction in a precise and representative way still remains a challenge, and manufacturers
rely mostly on full-scale field testing. Although laboratory studies for friction have been conducted, there are still some
limitations with the current setups, such as severe polishing and limited sample size. To address these limitations, a modified linear tribometer was produced, capable of testing full-sized cross-country skis at speeds up to 8 m/s on testbeds
made with laboratory-grown dendritic snow. This setup provides better control and can produce the same type of snow
repeatedly, allowing for more precise measurements of ski-snow friction. Consisting of a mobile carriage driven by a servo
motor, the modified tribometer carriage includes a fork, air bellow, the OAV Dovetail Linear Air Bearing, two vertical load
cells, a horizontal load cell, and a system for data acquisition and transmission. During a run, there is a phase of acceleration, constant speed, and deceleration, with the length of the constant speed phase varying from 2.50 to 5.50 m depending on the chosen acceleration of the motor. The vertical load can be adjusted from 50 N to 800 N, and the applied load
is distributed over the entire length of the binding with the center of mass approximately 12 cm behind the front of the
binding, which is similar to a skier’s weight distribution and center of mass over the ski. The force from the air bellow is
transmitted through the fork to the two vertical load cells, which sit on top of the OAV Dovetail Linear Air Bearing. The ski
is connected to the bottom of the air bearing, which can slide without friction, and the angle of the OAV Dovetail Linear
Air Bearing is adjusted with a screw and digital level. The resistance force of the ski on the snow is measured by a horizontal load cell placed between the housing and slider of the air bearing.
The OAV Dovetail Linear Air Bearing allows for the ski-snow friction to be measured with incredibly accurate precision.
The sliding mechanism of the air bearing allows for the ski to glide without any friction. The air bearing in the modified
tribometer provides greater control for the precise measurements, which is critical for developing and testing new ski wax
and base materials that align with the international ban of fluorine-containing waxes and ski bases.
The motor controller gradually reduces acceleration during the second half of the acceleration phase using a sinusoidal
ramp (S-ramp) to reduce the impact of inertia. The horizontal force during acceleration is significant due to the added
inertia force of the ski and slider. The air dragis negligible due to the measured air drag being less than 0.4% of the total
force when compared to the average friction force. The horizontal force is the ski-snow friction force, while the normal
force is measured by two vertical load cells. The friction coefficient is calculated by dividing the horizontal force by the
vertical force. Vibrations during the measurement are reduced by removing data points at the start and end of the measurement area. The spectral analysis is used to identify the major frequency and average amplitude of the force data.
The precision of the tribometer was assessed at three levels. At level 1, the precision of the friction measurement unit
was determined by measuring the coefficient of friction for 50 consecutive runs on a single track. The variation of the
measurement series around their linear trendlines was used to estimate the standard deviation and the relative standard
deviation for each track. At level 2, the precision within a single testbed was determined by running the test ski 50 times
on different parallel tracks within the same testbed. The standard deviation of all μ measurements was calculated around
the value of μfit,i, and the relative value for the standard deviation was obtained. The variation between different testbeds
was determined at level 3 by finding the linear fit for all measurements in all the tracks of all the testbeds and calculating
the standard deviation of the μ measurements around this line. The text notes that tribometer snow tracks polish over
time until an ice-like surface is obtained, and the coefficient of friction for a classic roller ski was measured as a comparison. The accuracy of the tribometer was assessed by comparing the absolute μ values obtained in the test to those
obtained in other studies.
Since the friction level variations for different snow surfaces and ski properties are generally large, the authors complemented the comparison of friction values from different studies by testing the rolling resistance of a classic roller ski. The
results showed that the reported tribometer’s accuracy is acceptable at the friction level of a roller ski, which is generally
comparable to that of a racing cross-country ski. Additionally, the standard deviation of the 50 roller ski runs at 6 m/s was
0.000227, indicating a high precision of 0.96%. The results suggest that the reported tribometer can achieve high precision even at lower friction levels, and the precision
within a single track is relatively high, especially for
aged snow.
The authors found that the dendritic structure of
new snow changes more rapidly than aged snow,
resulting in a greater reduction in the pore space
and an increase in density over 50 runs. The surface
topography of the new snow testbed also showed a
reduction in the visibility of dendritic features after
the test, while aged snow appeared more polished
and flatter.
OAV® DOVETAIL LINEAR AIR BEARING
CASE STUDIES
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沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
SIZES AND SPECIFICATIONS
Part Number BX4040 BX5050
Local Straightness .25 µm per 25 mm travel .25 µm per 25 mm travel
Maximum error 2 µm per 1000 mm travel 2 µm per 1000 mm travel
Flatness .0005 mm or .00002 in .0005 mm or .00002 in
Carriage Size 80 mm x 80 mm
and 75 mm length
90 mm x 90 mm
and 125 mm length
Travel 50 mm/100 mm/200 mm/300
mm or Custom Travel
50 mm/100 mm/200 mm/300 mm
or Custom Travel
Guidebar Size 40 mm x 40 mm 50 mm x 50 mm
Assembly Height 80 mm 90 mm
Carriage Weight .86 kg (1.89 lb) 1.6 kg (3.5 lb)
Total Weight 2.8 kg (6.1 lb) (100 mm travel) 5.76 kg (12.6 lb) (100 mm travel)
Guide Bar length Custom Custom
Z direction Load 124 lb (551 N) 356 lb (1583 N)
Y direction Load 124 lb (551 N) 356 lb (1583 N)
Air Flow 4.6 nlpm 5.1 nlpm
Pitch 78 N-m 160 N-m
Roll 78 N-m 144 N-m
Yaw 78 N-m 160 N-m
Y Stiffness 183 N/μ 353 N/μ
Z Stiffness 183 N/μ 353 N/μ
Web: https://www.rstbearing.com.cn
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沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
A Quantum Physical View of Time Crystals: OAV Air Bearing Used To Stabilize the Electrodynamic
Shaker’s Resonances for Experimentations on Non-Equilibrium Physics of Droplets
The Optical Sciences Centre at the Swinburne University of Technology in Melbourne, Australia aimed to
better understand the behavior of liquid droplets bouncing on the surface of a fluid bath through a quantum physical lens. When droplets are subject to periodic forcing, they may begin to “walk” on the surface
of the fluid, a result of each impact of the droplet with the fluid surface triggering a capillary wave, and the subsequent
gradients in the fluid surface driving the planar motion of the droplets. The team characterized these droplets as “droplet
time crystals” (DTC), which are periodically driven systems that exhibit a persistent oscillatory response with an integer
multiple of the driving period. The main components of the experiment included the electrodynamic shaker, the OAV Air
Bearing [OAVBX5050], the fluid bath, the droplet printer, and the optical imaging system used to observe and process
the information from the experiments. Using a custom optical table that rested on passive vibration isolation legs for
elimination of external noise, the driving force was provided by an electrodynamic shaker bolted onto a layer cake structure, which rested on machine mounts. The shaker was connected to the OAV Air Bearing through a drive rod, and the
air bearing was mounted on an aluminum plate on top of the optical table, connected to a high-purity compressed air
supply. The fluid bath was leveled, and the air bearing assembly was clamped in place before the air bearing slider bar
was connected to the drive rod. The design assembly can be seen in the below graphic.
Droplet Time Crystals System Set-Up Using Air Bearing; The OAV Air Bearing was a crucial component in the assembly.
Indeed, the OAVBX5050 was used to reduce the transverse vibrations through stabilization of the entire system due its
smooth and ultra-precise frictionless motion. Frictionless motion in the axial direction prevented adverse motion in the
transverse plane. The team chose an air bearing with a large enough surface area to maintain the total payload to a minimum, reducing the shaker resonances.
The fluid bath had a fluid containing diameter of 100 mm, with mass totaling to 570 g. It was mounted on an air bearing
slider bar and was precisely aligned by tilting the whole optical table using a two-axis digital level. Vibrations of the bath
were measured using two piezoelectric single-axis accelerometers. Droplets were introduced onto the fluid bath surface
using a droplet printer consisting of a computer-controlled two-axis linear translation stage and a piezoelectric droplet
generator. The droplet generator utilized a 35 mm diameter piezoelectric buzzer disk and M6 threaded brass nozzle with
0.1-1.0 mm nozzle size. The fluid was pumped into the generator by a peristaltic pump, and the fluid level was set using
a micrometer translation stage. The droplets’ motion was tracked via a top view camera and a side view camera.
In the experiment, multiple subsystems were used to control the data acquisition and measurement. A computer was
used to generate the driving signal for the shaker and read the accelerometer data, both at a 32 kHz sampling rate. The
signals were monitored using a digital storage oscilloscope and a software feedback loop maintained a fixed driving amplitude. A droplet printer was used to deposit droplets onto the fluid surface and two microcontrollers were used to monitor temperature probes and the droplet printer. The cameras were triggered manually and the images were processed
manually. However, all subsystems were integrated and controlled by a single workstation. Baseline measurements were
performed to characterize the mechanical resonance properties of the shaker and study its dependence on payload. The
shaker resonances were found to conform to the expectations and were in good agreement with previous studies.
The laboratory had air conditioning system to maintain 0.5 °C temperature stability, monitored by two PT100 platinum
RTD probes and a microcontroller. Calibration was done relative to each other at 21 °C ambient temperature. The fluid
used for the experiments was silicone oil with density of 950 kg/m3 and viscosity of 20 cSt at 25 °C. The thermal characterization depicted that the temperature of the fluid and the air remained within the air conditioning system specifications. However, the high-speed imaging light (135 W LED) could generate turbulent air currents and affect the droplet
dynamics, so it should only be turned on when necessary. These adverse effects can be eliminated by protecting the
fluid bath with enclosures. Continuous measurement of fluid temperature is not necessary unless extreme precision is
required. When the fluid bath vibrated above a certain frequency-dependent amplitude, called the Faraday threshold,
Faraday waves emerged on the fluid surface. The authors observed Faraday patterns with square and triangular unit
cells that repeated at a lower frequency than the driving frequency of the fluid bath. The authors also introduced droplets onto the fluid surface and observed that they stably bounced in a (2,1) mode, where their center of mass undergoes
vertical periodic oscillations at half the driving frequency of the fluid bath. The droplets also supported internal vibrational modes in free space. The authors fixed the driving frequency and amplitude
and studied the effect of varying the droplet size on the droplet’s bouncing
dynamics.
The droplet printer-generator produced arbitrary two-dimensional patterns of
droplets on a bath. The resulting structures were determined by droplet-droplet interactions. An example of this is a square lattice of droplets, which after
5 minutes, undergoes a transmutation to a triangle lattice. This is a non-trivial
phenomenon as the system is driven far from the Faraday threshold and the
preference for a triangle lattice over a square lattice cannot be explained by
energy conservation or higher packing fraction alone. The observed behavior is
due to complex, self-consistent interplay between wave-mediated many-body
interactions between the droplets and subtle boundary effects.
OAV®BOX SERIES RAIL GUIDES
CASE STUDIES
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沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
OAV® ROLL TO ROLL CONTACTLESS
OAV Roll-to-roll (R2R) processing, also known as web processing or reel-to-reel processing, is an important class of
substrate-based manufacturing processes in which additive and subtractive processes are used to build structures
in a non contact continuous manner. OAV web rollers are
off-the-shelf and can be custom designed to be suited for
many applications.
For fine film and web substrate handling, OAV Air Turns
AT75600 feature porous media variable surface activation - 120 deg, 240 deg, 360 deg - and combined with
pressure adjustment to suit the application, allow for
optimized flow, web suspension, and web tension control.
This is controlled with simple rotation of the end cap that
only takes moments to secure. Air turns can be retrofitted to replace existing traditional contact roller conveyors, either with the standard size or custom fitting to match the existing assembly. Contactless handling reduces
handling damage and material contamination, reducing costs associated with material scrap and rework. Costs
associated with maintenance are reduced as well, with little scheduled maintenance and an indefinite operating
life when run within recommended guidelines. Application markets include flexible electronics, flexible photovoltaics, printed/flexible thin film batteries, fuel cells and electrolyzers, multilayer capacitors, thick film sensor
materials, anti-static, release, reflective and anti-reflective coatings, barrier coatings, building products, chemical separation membranes.
OAV Air Turns can be used with Air Bearing Bars OAVCB6060 to suit material handling needs for combined
linear conveyance.
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沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
OAV® X-SPIN ROLLER AIR BEARINGS
The Outer Spin Rotary Air Bearing provides the ability
to spin outer rings with an incredible accuracy of TIR±
1 millionths inches (.025 μm) while maintaining zero
friction and contact, zero maintenance, no generation of thermal energy at
high speeds, and an infinite operating life. This ultra-precise, hard-installable innovation is here to replace conventional bearings with unmatched
improvements and efficiency. OAV Air Bearings offers products that have
significantly higher levels of stiffness with superb geometric performance.
The OAV External Spin Rotary Air Bearing preloads both the horizontal
and vertical surface with an opposing thin film of pressure, maintaining the
perfect gap and optimal levels of tolerance. The OAV Air Bearings surface
design equally distributes the air and preloads it over an entire surface area,
resulting in outstanding stiffness as well as maximized performance levels.
OAV X-SPIN ROLLER AIR BEARING
Size 13 mm ID 40 mm ID 75 mm ID
Part Number OAVRL13MX OAVRL40MX OAVRL75MX
Housing Material/Finish Aircraft Quality Aluminum Aircraft Quality Aluminum Aircraft Quality Aluminum
Input Pressure 20 psi - 100 max psi (0.13 MPa to 0.68
MPa)
20 psi - 100 max psi (0.13 MPa to
0.68 MPa)
20 psi - 100 max psi (0.13 MPa to
0.68 MPa)
Porous Material OAV Carbon Graphite OAV Carbon Graphite OAV Carbon Graphite
Pressure Port Threads TBD TBD TBD
Radial Load Capacity 13.0 lbs (57.8 N) 40.1 lbs (178.4 N) 130.0 lbs (578.3 N)
Thrust Load 30.0 lbs (133.5 N) 72.0 lbs (320.3 N) 280.0 lbs (1245.5 N)
Radial Stiffness 11 N/μm (0.06 lbs/μin) 68 N/μm (0.41 lbs/μin) 159 N/μm (0.91 lbs/μin)
Total Indicated Runout (TIR) ± 1 millionths in (.025 μm) ± 1 millionths in (.025 μ) ± 1 millionths in (.025 μ)
Bearing Inside Diameter (ID 13 mm + .01/-.00 40 mm + .01/.00 75 mm + .01/.00
Bearing Outside Diameter (OD) 44.5 mm + .00/-.01 100 mm + .00/-.01 140 mm + .00/- .01
Bearing Width 22 mm 36 mm 51 mm
Bearing Weight .15 lb 1.14 lb 2.2 lb
Shaft Diameter 13 mm + .01/.00 40 mm + .01/.00 75 mm + .01/.00
Housing Bore size Light Press Fit
Method
44.48 mm + .02/-.00 99.98 mm + .02/-.00 139.98 mm + .02/-.00
Flow rate 15 SCFH 21 SCFH 39 SCFH
Web: https://www.rstbearing.com.cn
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沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
SIZES AND SPECIFICATIONS
Size 20 mm x 40 mm 25 mm x 50 mm 25 mm x 100 mm 40 mm x 50 mm
Part# OAVF20L40 OAVF25L50 OAVF25L100 OAVF40L50
Housing
Material/Finish
7075 Aircraft Quality
Aluminum/
Mil Spec Hard Anodize
7075 Aircraft Quality
Aluminum/
Mil Spec Hard Anodize
7075 Aircraft Quality
Aluminum/
Mil Spec Hard Anodize
7075 Aircraft Quality
Aluminum/
Mil Spec Hard Anodize
Input Pressure 20 psi - 100 max psi (0.13
MPa to 0.68 MPa)
20 psi - 100 max psi (0.13
MPa to 0.68 MPa)
20 psi - 100 max psi (0.13 MPa to
0.68 MPa)
20 psi - 100 max psi (0.13 MPa to
0.68 MPa)
Ideal Load 161 N (36 lbs) 250 N (56 lbs) 499 N (112 lbs) 401 N (90 lbs)
Porous Material Carbon Carbon Carbon Carbon
Pressure Port
Threads
M3 x 0.5 M3 x 0.5 M5 x 0.8 M5 x 0.8
Stiffness 15.77 N/μ (0.09 lbs/μin) 24.53 N/μ (0.14 lbs/μin) 49.06 N/μ (0.28 lbs/μin) 39.42N/μ (0.23 lbs/μin)
Flow 0.90 NLPM (2.0 SCFH) 1.1 NLPM (2.4 SCFH) 1.9 NLPM (4.0 SCFH) 1.3 NLPM (2.9 SCFH)
Fly Height 5 μ 5 μ 5 μ 5 μ
Bearing Height 13 mm 17 mm 25 mm 13 mm
Bearing Weight 25 g 47 g 163 g 55 g
Flatness 0.0005 mm (0.00002 in) 0.0005 mm (0.00002 in) 0.0005 mm (0.00002 in) 0.0005 mm (0.00002 in)
SIZES AND SPECIFICATIONS
Size 40 mm x 80 mm 50 mm x 100 mm 100 mm x 200 mm 100 mm x 1000 mm
Part# OAVF40L80 OAVF50L100 OAVF100L200 OAVF100L1000
Housing
Material/Finish
7075 Aircraft Quality
Aluminum/
Mil Spec Hard Anodize
7075 Aircraft Quality
Aluminum/
Mil Spec Hard Anodize
7075 Aircraft Quality
Aluminum/
Mil Spec Hard Anodize
7075 Aircraft Quality
Aluminum/
Mil Spec Hard Anodize
Input Pressure 20 psi - 100 max psi (0.13
MPa to 0.68 MPa)
20 psi - 100 max psi (0.13
MPa to 0.68 MPa)
20 psi - 100 max psi (0.13 MPa to
0.68 MPa)
20 psi - 100 max psi (0.13 MPa to 0.68
MPa)
Ideal Load 637 N (143 lbs) 1184 N (266 lbs) 5136 N (1154 lbs) 20697 N (4651 lbs)
Porous Material Carbon Carbon Carbon Carbon
Pressure Port
Threads
M5 x 0.8 M5 x 0.8 M5 x 0.8 M5 x 0.8
Stiffness 62.63 N/μ (0.36 lbs/μin) 116.51 N/μ (0.67 lbs/μin) 505.44 N/μ (2.89 lbs/μin) 2,037.10 N/μ (11.63 lbs/μin)
Flow 1.8 NLPM (3.8 SCFH) 2.3 NLPM (4.8 SCFH) 4.5 NLPM (9.6 SCFH) 21.0 NLPM (44.6 SCFH)
Fly Height 5 μ 5 μ 5 μ 5 μ
Bearing Height 20 mm 25 mm 39 mm 42 mm
Bearing Weight 143 g 295 g 1877 g 11,164 g
Flatness 0.0005 mm (0.00002 in) 0.0005 mm (0.00002 in) 0.0005 mm (0.00002 in) 0.0005 mm (0.00002 in)
We offer a line of flat rectangular air bearing components designed
to meet the non-contact requirements at low cost while yielding high
performance. OAV Flat Air Bearings are
often used as a standard off-the-shelf
solution for providing axial constraint in
rotary motion applications. Our standard
product line is available in metric sizing as
well as the custom sizing made to order
upon request.
OAV® FLAT RECTANGULAR AIR BEARINGS
Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
VACUUM PRE-LOADED AIR BEARINGS
OAV Vacuum Preloaded Air Bearings work on flat, nonporous surfaces such as granite, aluminum, glass, and ceramics. The round design allows for smooth, frictionless motion. OAV Vacuum Preloaded Air Bearings combine the use of vacuum and air pressure,
creating superior damping. It allows the air bearing to press down while
simultaneously being lifted from the surface. By combining vacuum and
air pressure, these bearings offer advantages for many
applications across various industries. The vacuum preloaded air bearings
can be optimized by adjusting the vacuum and pressure separately,
allowing precise control over the fly height and stiffness.
The vacuum preloaded line replaces part of the bearing’s surface area
with a dedicated vacuum pressure zone. Fine-tuning of this vacuum/
pressure setup achieves superior damping, resulting in the need for only
one flat guide surface rather than two.
Size 50 mm 80 mm 100 mm
Part Number OAVR050RV OAVR080RV OAVR100RV
Input Pressure 20 psi - 100 max psi (0.13 MPa to 0.68 MPa) 20 psi - 100 max psi (0.13 MPa to 0.68 MPa) 20 psi - 100 max psi (0.13 MPa to 0.68
MPa)
Input Vacuum 15 in Hg 15 in Hg 15 in Hg
Ideal Load 46 N (10.4 lbs) 113 N (25.3 lbs) 173 N (38.8 lbs)
Stiffness 13 N/μ (0.08 lbs/μin) 30 N/μ (0.17 lbs/μin) 48 N/μ (0.28 lbs/μin)
Flow Rate 1.1 NLPM (2.4 SCFH) 1.3 NLPM (2.8 SCFH) 2.3 NLPM (4.9 SCFH)
Fly Height 5 μ 5 μ 5 μ
Bearing Size 50 mm 80 mm 100 mm
Bearing Height 22 mm 22 mm 22 mm
Bearing Weight 98 g 253 g 382 g
Housing Material/
Finish
7075 Aircraft Quality Aluminum/ Mil Spec
Hard Anodize
7075 Aircraft Quality Aluminum/ Mil Spec
Hard Anodize
7075 Aircraft Quality Aluminum/ Mil
Spec Hard Anodize
Porous Media Material Carbon Carbon Carbon
Flatness 0.001 mm (0.00004 in) 0.001 mm (0.00004 in) 0.001 mm (0.00004 in)
Presssure/Vacuum
Port Threads
M3 x 0.5 M5 x 0.8 M5 x 0.8
Size 20 mm X 40 mm 25 mm X 50 mm 40 mm X 50 mm 40 mm X 80 mm 50 mm X 100 mm
Part Number OAVF20L40V OAVF25L50V OAVF40L50V OAVF40L80V OAVF50L100V
Input Pressure 20 psi - 100 max psi
(0.13 MPa to 0.68 MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68 MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68 MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68 MPa)
20 psi - 100 max psi (0.13
MPa to 0.68 MPa)
Input Vacuum 15 in Hg (50.8 kPa) 15 in Hg (50.8 kPa) 15 in Hg (50.8 kPa) 15 in Hg (50.8 kPa) 15 in Hg (50.8 kPa)
Ideal Load 116 N (26 lbs) 185 N (41 lbs) 303 N (68 lbs) 463 N (104 lbs) 735 N (165 lbs)
Stiffness 10 N/micron (0.058
lbs/μ in)
16 N/micron (0.096
lbs/μ in)
26.5 N/micron (0.15
lbs/µ in)
38.4 N/micron (0.22
lbs/μ in)
73 N/micron (0.42 lbs/µ
in)
Flow Rate 1.44 SCFH 1.78 SCFH 2.2 SCFH 2.8 SCFH 3.62 SCFH
Fly Height 5 μ 5 μ 5 μ 5 μ 5 μ
Bearing Height 13 mm 13 mm 17 mm 15 mm 25 mm
Bearing Weight 22.5 gram 8 g 73 g 104 g 285 g
Housing Material/
Finish
Aluminum/Anodized Aluminum/Anodized Aluminum/Anodized Aluminum/Anodized Aluminum/Anodized
Porous Media Material Carbon Carbon Carbon Carbon Carbon
Flatness 0.0005mm(.00002in) 0.0005mm(.00002in) .0005mm(.00002 in) 0.0005 mm (0.00002 in) .0005mm(.00002 in)
Pressure/ Vacuum
Port Threads
M3x0.5 M3x0.5 M5 x 0.8 M5 x 0.8 M5 x 0.8
Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
OAV® FLAT ROUND AIR BEARINGS
OAV Flat Air Bearings represent a pivotal innovation in precision engineering. These non-contact bearings employ a
thin film of pressurized air to create a frictionless, zero-wear surface,
allowing for minimalistic design while maximizing performance.
Particularly suited for high-speed and high-precision applications,
flat air bearings offer enhanced stability, accuracy, and repeatability, making them an ideal choice for
rotary and linear applications in fields
ranging from semiconductor manufacturing to metrology.
OAV’s Flat Round Air Bearing product
line works on level, non-porous media
such as granite, aluminum, glass, and
ceramics. OAV offers a variety of sizes
that can easily be customized for various
applications.
Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
80 mm 100 mm 125 mm 150 mm 200 mm
OAVR080R OAVR100R OAVR125R OAVR150R OAVR200R
20 psi - 100 max psi (0.13
MPa to 0.68 MPa)
20 psi - 100 max psi (0.13 MPa
to 0.68 MPa)
20 psi - 100 max psi (0.13 MPa
to 0.68 MPa)
20 psi - 100 max psi (0.13
MPa to 0.68 MPa)
20 psi - 100 max psi (0.13
MPa to 0.68 MPa)
1189 N (267 lbs) 1856 N (417 lbs) 2897 N (651 lbs) 4535 N (1019 lbs) 8064 N (1812 lbs)
116.94 N/μ (0.67 lbs/μ
in)
182.64 N/μ (1.04 lbs/μ in) 285.13 N/μ (1.63 lbs/μ in) 446.31 N/μ (2.55 lbs/μ in) 793.64 N/μ (4.53 lbs/μ in)
1.9 NLPM (4.0 SCFH) 2.4 NLPM (5.1 SCFH) 3.0 NLPM (6.4 SCFH) 3.6 NLPM (7.7 SCFH)) 4.8 NLPM (10.1 SCFH)
5 μ 5 μ 5 μ 5 μ 5 μ
20 mm 25 mm 35 mm 50 mm 70 mm
231 g 436 g 1028 g 2085 g 4765 g
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec Hard
Anodize
7075 Aircraft Quality
Aluminum/Mil Spec Hard
Anodize
7075 Aircraft Quality
Aluminum/Mil Spec Hard
Anodize
7075 Aircraft Quality
Aluminum/Mil Spec Hard
Anodize
Carbon Carbon Carbon Carbon Carbon
0.0005 mm (0.00002 in) 0.0005 mm (0.00002 in) 0.0005 mm (0.00002 in) 0.0005 mm (0.00002 in) 0.0005 mm (0.00002 in)
M5 x 0.8 M5 x 0.8 M5 x 0.8 M5 x 0.8 M5 x 0.8
Size 25 mm 40 mm 50 mm 65 mm
Part Number OAVR025R OAVR040R OAVR050R OAVR065R
Input Pressure 20 psi - 100 max psi (0.13 MPa
to 0.68 MPa)
20 psi - 100 max psi (0.13 MPa
to 0.68 MPa)
20 psi - 100 max psi (0.13
MPa to 0.68 MPa)
20 psi - 100 max psi (0.13
MPa to 0.68 MPa)
Ideal Load 98 N (22 lbs) 254 N (57 lbs) 392 N (88 lbs) 664 N (149 lbs)
Stiffness 18.4 N/μ (0.11 lbs/μ in) 29.43 N/μ (0.17 lbs/μ in) 60.71 N/μ (0.35 lbs/μ in) 91.98 N/μ (0.53 lbs/μ in)
Flow Rate 0.6 NLPM (1.3 SCFH) 0.93 NLPM (2.0 SCFH) 1.2 NLPM (2.5 SCFH) 1.5 NLPM (3.2 SCFH)
Fly Height 5 μ 5 μ 5 μ 5 μ
Bearing Height 13 mm 13 mm 13 mm 20 mm
Bearing Weight 14 g 34 g 61 g 149 g
Housing Material/Finish 7075 Aircraft Quality
Aluminum/Mil Spec Hard
Anodize
7075 Aircraft Quality
Aluminum/Mil Spec Hard
Anodize
7075 Aircraft Quality
Aluminum/Mil Spec Hard
Anodize
7075 Aircraft Quality
Aluminum/Mil Spec Hard
Anodize
Porous Media Material Carbon Carbon Carbon Carbon
Flatness 0.0005 mm (0.00002 in) 0.0005 mm (0.00002 in) 0.0005 mm (0.00002 in) 0.0005 mm (0.00002 in)
Pressure Port Thread M3 x 0.5 M5 x 0.8 M5 x 0.8 M5 x 0.8
HIGH PERFORMANCE
Flat Round Air Bearings can be used in both linear
and rotary motion applications.
Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
OAV® ROLLER AIR BEARINGS
Size 0.500 ID 0.7500 ID 1.000 ID 1.500 ID 2.000 ID 3.000 ID
Part Number OAVRL0500 OAVRL0750 OAVRL1000 OAVRL1500 OAVRL2000 OAVRL3000
Housing Material/Finish
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
Side Material/
Finish
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
Porous Material Carbon Carbon Carbon Carbon Carbon Carbon
Input Pressure 20 psi - 100 max psi
(0.13 MPa to 0.68
MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68
MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68
MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68
MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68
MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68
MPa)
Pressure Port
Threads
M5 x 0.8 M5 x 0.8 M5 x 0.8 M5 x 0.8 M5 x 0.8 M5 x 0.8
Lifetime Infinite Infinite Infinite Infinite Infinite Infinite
Radial Load Max 6.5 lbs (28.9 N) 22.6 lbs (100.5 N) 28.6 lbs (127.2 N) 56.2 lbs (250.0 N) 70.1 lbs (311.8 N) 124.8 lbs (555.1 N)
Axial Load Max 27.0 lbs (120.1 N) 85 lbs (378.1 N) 155 lbs (689.5 N) 185.0 lbs (822.9 N) 175.0 lbs (778.4 N) 260.0 lbs (1156.5 N)
Total Indicated
Runout (TIR)
± 1 millionths in
(.025 µm)
± 1 millionths in (.025
µm)
± 1 millionths in
(.025 µm)
± 1 millionths in (.025
µm)
± 1 millionths in (.025
µm)
± 1 millionths in (.025
µm)
Axial and Radial
Error Motion
.9 μin/(0.023 µm) .9 μin/(0.023 µm) .9 μin/(0.023 µm) 1.1 μin/(0.027 µm) 1.1 μin/(0.027 µm) 1.1 μin/(0.027 µm)
Bearings Inside
Diameter (ID)
0.500 in + .0005/-
.0000
0.7500 in + .0005/-
.0000
1.0000 in + .0005/-
.0000
1.500 in + .0005/-
.0000
2.0000 in + .0005/-
.0000
3.0000 in + .0005/-
.0000
Bearing Outside
Diameter (OD)
1.7500 in + .0000/-
.0005
2.7500 in + .0000/-
.0005
3.5000 in + .0000/-
.0005
4.0000 in + .0000/-
.0005
4.2500 in + .0000/-
.0005
5.5000 in + .0000/-
.0005
Bearing Width .865 in 1.25 in 1.375 in 1.625 in 1.750 in 2.000 in
Weight .17 lb .58 lb 1.1 lb 1.44 lb 1.7 lb 2.9 lbs
Shaft Diameter 0.5000 in 0.7500 in 1.000 in 1.500 in 2.000 in 3.000 in
Housing Bore
size Light Press
Fit Method
1.7493 in + .0007/-
.0000
2.7493 in + .0007/-
.0000
3.4993 in + .0007/-
.0000
3.9993 in + .0007/-
.0000
4.2493 in + .0007/-
.0000
.4993 in + .0007/-
.0000
Flow rate 5 SCFH 15 SCFH 15.5 SCFH 16.1 SCFH 17.5 SCFH 31 SCFH
The OAV Roller Air Bearing is here to replace conventional bearings with advanced and optimal efficiency. A breakthrough innovation from OAV Air Bearings. An ultra precise, hard-installable replacement for conventional bearings. The result: no friction, no contact, no maintenance, no heat generation at high speeds, and an infinite operating life.
OAV Air bearings have higher stiffness and excellent geometric performance.
OAV Roller Air Bearings preload both the horizontal and vertical surface with
opposing thin film pressure, maintaining the perfect gap for ultimate precision. OAV Air Bearings surface design
equally distributes the air and pre-load over a entire surface area; the result is outstanding stiffness and maximized
performance.
Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
Size 13 mm ID 20 mm ID 25 mm ID 40 mm ID 750 mm ID 75 mm ID
Part Number OAVRL13M OAVRL20M OAVRL25M OAVRL40M OAVRL50M OAVRL75M
Housing Material/Finish
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
Side Material/
Finish
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
Porous Material Carbon Carbon Carbon Carbon Carbon Carbon
Input Pressure 20 psi - 100 max psi
(0.13 MPa to 0.68
MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68
MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68
MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68
MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68
MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68
MPa)
Pressure Port
Threads
M5 x 0.8 M5 x 0.8 M5 x 0.8 M5 x 0.8 M5 x 0.8 M5 x 0.8
Lifetime Infinite Infinite Infinite Infinite Infinite Infinite
Radial Load Max 28.9 N (6.5 lbs) 100.5 N (22.6 lbs) 127.2 N (28.6 lbs) 250.0 N (56.2 lbs) 311.8 N (70.1 lbs) 555.1 N (124.8 lbs)
Axial Load Max 120.1 N (27 lbs) 378.1 N (85.0 lbs) 689.5 N (155 lbs) 822.9 N (185.0 lbs) 778.4 N (175.0 lbs) 1156.5 N (260.0 lbs)
Total Indicated
Runout (TIR)
± 1 millionths Lifetime in (.025 µm)
± 1 millionths Lifetime in (.025 µm)
± 1 millionths in
(.025 µm)
± 1 millionths of an in
(.025 µm)
± 1 millionths in (.025
µm)
± 1 millionths in (.025
µm)
Axial and Radial
Error Motion
.9 μin/(0.023 µm) .9 μin/(0.023 µm) .9 μin/(0.023 µm) 1.1 μin/(0.027 µm) 1.1 μin/(0.027 µm) 1.1 μin/(0.027 µm
Bearings Inside
Diameter (ID)
13 mm + .01/-.00 20 mm + .01/-.00 25 mm + .01/-.00 40 mm + .01/-.00 50 mm + .01/-.00 75 mm + .01/-.00
Bearing Outside
Diameter (OD)
44.50 mm + .00/-.01 70 mm + .00/-.01 90 mm + .00/-.01 100 mm + .00/-.01 110 mm + .0000/-.01 140 mm + .0000/-.01
Bearing Width 22 mm 31.8 mm 34.9 mm 41.3 mm 44.5 mm 50.8 mm
Weight .17 lb .58 lb 1.1 lb 1.44 lb 2.7 lbs 2.9 lbs
Shaft Diameter 13 mm 20 mm 25 mm 40 mm 50 mm 75 mm
Housing Bore
size Light Press
Fit Method
44.48 mm + .02/-.00 69.98 mm + .02/-.00 89.98 mm + .02/-.00 99.98 mm +.02/-.00 109.98 mm + .02/-.00 139.98 mm + .02/-.00
Flow rate 4.97 SCFH 15 SCFH 15.5 SCFH 16.1 SCFH 39.3 SCFH 26 SCFH
CAPTURING THE ENERGY OF THE OCEAN
Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
OAV® THRUST AIR BEARINGS AND
BUSHINGS
THRUST AIR BEARINGS
Size 13 mm ID 20 mm ID 25 mm ID 50 mm ID 75 mm ID
Part Number OAVTR32i13 OAVTR60i20 OAVTR60i25 OAVTR100i50 OAVTR150i75
Housing Material/Finish 7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec
Hard Anodize
7075 Aircraft Quality
Aluminum/Mil Spec Hard
Anodize
7075 Aircraft Quality
Aluminum/Mil Spec Hard
Anodize
Input Pressure 20 psi - 100 max psi
(0.13 MPa to 0.68 MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68 MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68 MPa)
20 psi - 100 max psi (0.13
MPa to 0.68 MPa)
20 psi - 100 max psi (0.13
MPa to 0.68 MPa)
Porous Material Carbon Carbon Carbon Carbon Carbon
Pressure Port Threads M3 x 0.5 M5 x 0.8 M5 x 0.8 M5 x 0.8 M5 x 0.8
Lifetime Infinite Infinite Infinite Infinite Infinite
Radial Load Capacity 10.7 N (2.4 lbs) 52.0 N (11.7 lbs) 65.4 N (14.7 lbs) 190.8 N (42.9 lbs) 286.5 N (64.4 lbs)
Thrust Load Capacity 81.4 N (18.3 lbs) 373.7 N (84.0 lbs) 302.9 N (68.1 lbs) 862.1 N (193.8 lbs) 2215.2 N (498.0 lbs)
Radial Stiffness 2.6 N/μm (0.01 lbs/μin) 5 N/μm (0.03 lbs/μin) 7.3 N/μm (0.04 lbs/μin) 24 N/μm (0.14 lbs/μin) 34.8 N/μm (0.20 lbs/μin)
Pitch Moment Max 0.8 N-m (7.5 lbs-in) 1.1 N-m (10 lbs-in) 1.9 N-m (17 lbs-in) 5.2 N-m (46 lbs-in) 7.1 N-m (63 lbs-in)
Bearing Inside Diameter
(ID)
13.018 mm + .005/-.000 20.018 mm + .005/-
.000
25.018 mm + .005/-.000 50.018 mm + .005/-.000 75.018 mm + .005/-.000
Bearing Outside Diameter (OD)
31.75 mm + .13/-.00 59.59 mm + .13/-.00 59.59 mm + .13/-.00 99.49 mm + .13/-.00 150 mm + .13/-.00
Bearing Length 12.7 mm 16.5 mm 16.5 mm 19.6 mm 19.6 mm
Bearing Weight 12.8 g 95.7 g 86.7 g 266.3 g 476.4 g
Recommended Shaft
Outside Diameter (OD)
13 mm - .02 20 mm - .02 25 mm - .02 50 mm - .02 75 mm - .02
Flow Rate 8.1 SCFH (3.8 NLPM) 15.6 SCFH (7.4 NLPM) 14.8 SCFH (7.0 NLPM) 28.5 SCFH (13.5 NLPM) 42.1 SCFH (19.9 NLPM)
Housing Bore Size Light
Press Fit Method
31.775 mm + .000/-.025 59.630 mm + .000/-
.025
59.630 mm + .000/-.035 99.525 mm + .000/-.035 150.04 mm + .000/-.04
The OAV Thrust Air Bearing is a breakthrough
innovation in air-bearing technology. For the
first time, an air bearing is available that fully
integrates and works on a three-way frictionless
surface. OAV’s Air Bearing configurations run on
standard-sized shafting for fixed, linear motion
while maximizing rotational motion with ultra
precision and zero friction using aerospace-quality aluminum.
OAV Air Bearings have higher stiffness and
excellent geometric performance. The OAV Thrust Air Bearing preloads both the horizontal and vertical surfaces with opposing thin films of pressure. This maintains the perfect gap for ultimate tolerance, and the surface
design of the bearing equally distributes the air and pre-loads it over the entire surface area. The result is outstanding stiffness with maximized performance.
Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
Size 4 mm ID 6 mm ID 8 mm ID 13 mm ID 20 mm ID 25 mm ID 50 mm ID 75 mm ID
Part Number OAVTB16i04 OAVTB24i06 OAVTB24i08 OAVTB32i13 OAVTB60i20 OAVTB60i25 OAVTB100i50 OAVTB150i75
Housing Material/Finish
7075 Aircraft
Quality Aluminum/Mil Spec
Hard Anodize
7075 Aircraft
Quality Aluminum/Mil Spec
Hard Anodize
7075 Aircraft
Quality Aluminum/Mil Spec
Hard Anodize
7075 Aircraft
Quality Aluminum/Mil Spec
Hard Anodize
7075 Aircraft
Quality Aluminum/Mil Spec
Hard Anodize
7075 Aircraft
Quality Aluminum/Mil Spec
Hard Anodize
7075 Aircraft
Quality Aluminum/Mil Spec
Hard Anodize
7075 Aircraft
Quality Aluminum/Mil Spec
Hard Anodize
Input Pressure 20 psi - 100
max psi (0.13
MPa to 0.68
MPa)
20 psi - 100
max psi (0.13
MPa to 0.68
MPa)
20 psi - 100
max psi (0.13
MPa to 0.68
MPa)
20 psi - 100
max psi (0.13
MPa to 0.68
MPa)
20 psi - 100
max psi (0.13
MPa to 0.68
MPa)
20 psi - 100 max
psi (0.13 MPa to
0.68 MPa)
20 psi - 100
max psi (0.13
MPa to 0.68
MPa)
20 psi - 100 max
psi (0.13 MPa to
0.68 MPa)
Porous Material Carbon Carbon Carbon Carbon Carbon Carbon Carbon Carbon
Pressure Port
Threads
M3 x 0.5 M3 x 0.5 M3 x 0.5 M3 x 0.5 M5 x 0.8 M5 x 0.8 M5 x 0.8 M5 x 0.8
Lifetime Infinite Infinite Infinite Infinite Infinite Infinite Infinite Infinite
Radial Load
Capacity
9.3 N (2.1 lbs) 20.9 N (4.7 lbs) 32.6 N (7.4 lbs) 43.2 N (9.7 lbs) 244.2 N (54.9
lbs)
305.1 N (68.6
lbs)
871.4 N (195.9
lbs)
1306.9 N (293.8
lbs)
Thrust Load
Capacity
16.0 N (3.6
lbs)
28.4 N (6.4 lbs) 25.4 N (5.7 lbs) 81.4 N (18.3
lbs)
373.7 N (84.0
lbs)
302.9 N (68.1
lbs)
862.1 N (193.8
lbs)
2215.2 N (498.0
lbs)
Radial Stiffness 5 N/μm (0.03
lbs/μin)
5.1 N/μm
(0.027 lbs/μin)
8 N/μm (0.043
lbs/μin
11 N/μm (0.06
lbs/μin)
23 N/μm (0.13
lbs/μin)
34 N/μm (0.19
lbs/μin)
110 N/μm (0.63
lbs/μin)
159 N/μm (0.91
lbs/μin)
Pitch Moment
Max
0.013 N-m
(0.125 lbs-in)
0.4 N-m (3.6
lbs-in)
0.5 N-m (4.6
lbs-in)
0.8 N-m (7.5
lbs-in)
10 lbs-in (1.1
N-m)
17 lbs-in (1.9
N-m)
46 lbs-in (5.2
N-m)
7.1 N-m (63
lbs-in)
Thrust Bushing
Inside Diameter
(ID)
4.018 mm +
.005/-.000
6.018 mm +
.005/-.000
8.018 mm +
.005/-.000
13.018 mm +
.005/-.000
20.018 mm +
.005/-.000
25.018 mm +
.005/-.000
50.018 mm
.005/-.000
75.018 mm +
.005/-.000
Thrust Bushing
Outside Diameter (OD)
16.10 mm +
.13/-.00
23.67 mm +
.13/-.00
23.67 mm +
.13/-.00
31.75 mm +
.13/-.00
59.59 mm +
.13/-.00
59.59 mm +
.13/-.00
99.49 mm +
.13/-.00
150 mm + .13/-
.00
Bushing Length 33 mm 53.34 mm 53.34 mm 52.8 mm 79.2 mm 79.2 mm 91.4 mm 91.4 mm
Bushing Weight 13.8 g 30.8 g 30.8 g 86 g 465 g 416.9 g 1237.9 g 2899.9 g
Recommended
Shaft Outside
Diameter (OD)
4.00 mm - .02 6.00 mm - .02 8.00 mm - .02 13.00 mm - .02 20 mm - .02 25 mm - .02 50 mm - .02 75 mm - .02
Flow Rate 4.2 SCFH
(2.0 NLPM)
2.9 SCFH
(1.4 NLPM)
2.9 SCFH
(1.4 NLPM)
12 SCFH
(5.7 NLPM)
15.6 SCFH
(7.4 NLPM)
14.8 SCFH
(7.0 NLPM)
28.5 SCFH
(13.5 NLPM)
42.1 SCFH
(19.9 NLPM)
Housing Bore
Size O-Ring
Method
16.79 mm +
.000/-.127
24.05 mm +
.000/.-.127
24.05 mm +
.000/.-.127
32.13 mm +
.000/-.127
59.97 mm +
.000 /-.127
59.97 mm +
.000/-.127
100.4 mm +
.000/-.127
151.94 mm +
.000/-.127
Housing Bore
Size Light
Press Fit
Method
16.125 mm
+ .000/ -.025
23.070 mm +
.000/ -.025
23.070 mm +
.000/ -.025
31.775 mm +
.000/-.025
59.630 mm +
.000/-.025
59.630 mm +
.000/-.035
99.525 mm +
.000/-.035
150.04 mm +
.000/-.04
Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
OAV® MODULAR AIR BEARINGS
38 MM X 38 MM X 50 MM MODULAR CORNER
AIR BEARING
Size 38 mm x 50 mm
Part Number OAV90DG50
Input Pressure 20 psi - 100 max psi (0.13 MPa to
0.68 MPa)
Ideal Load X 160 N (35 lbs)
Ideal Load Y 160 N (35 lbs)
Stiffness 14 N/μ (0.08 lbs/μin)
Flow 1.6 NLPM (3.4 SCFH)
Fly Height 4 μ
Bearing Size 38 mm x 50 mm
Bearing Height 38 mm
Bearing Weight 91 g
Housing Material/Finish Aluminum Hard Anodized
Porous Media Material Carbon
Flatness 0.0005 mm (0.00002 in)
Pressure Port Thread M5 x 0.8
55 MM X 55 MM X 80 MM VACUUM PRELOADED
MODULAR CORNER AIR BEARING
Size 40 mm x 80 mm
Part Number OAVMOD40L80V
Input Pressure 20 psi - 100 max psi (0.13 MPa to
0.68 MPa)
Ideal Load 530 N (119 lbs)
Stiffness 48 N/μ (0.27 lbs/μin)
Hold Down Force @50.8 kPa 66.75 N (0.27 lbs/μ in)
Flow 1.5 NLPM (3.16 SCFH)
Fly Height 5 μ
Bearing Size 40 mm x 80 mm
Bearing Height 15 mm
Bearing Weight 259 g
Housing Material/Finish Aluminum/Anodized
Porous Media Material Carbon
Flatness 0.0005 mm (0.00002 in)
Port Thread M5 x 0.8
The OAV Modular Air Bearing design subdivides motion systems into smaller installable parts. They can be
independently installed and then used in different systems and shapes. OAV Modular Air Bearings make use
of industry standards for interfaces.
OAV Modular Air Bearings offer many benefits such as reduction in cost, shorter installation time, flexibility in
design, augmentation, and exclusion. It is a complete offering of air bearings produced with the design for
easy retrofitting into existing applications or designing into new applications for ultimate accuracy positioning.
OAV Air Bearings generate evenly distributed gas films between surface and the substrate. Because of low
gas viscosity and friction losses by viscous shearing, mechanical contact is avoided. Our modular air bearings
are manufactured with aerospace quality material. They are ultra-precise with exceptional linear straightness
and flatness. Vibration and maintenance-free, ready to install.
Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
OAV® EPOXY BONDED AIR BEARINGS
Epoxy bonded air bearings utilize a thin layer of epoxy to bond the surface of the air bearing to the supporting
structure, offering higher precision, no friction, and longer life. The thin layer of epoxy serves as a cushion, allowing
for higher stiffness, greater accuracy and frictionless movement while maintaining a low-profile. Additionally, epoxy
bonded air bearings are able to withstand wide temperature ranges, vibrations, shock, and other harsh environmental conditions.
EPOXY BONDED AIR BEARINGS
Size 23 mm x 98 mm 16 mm x 100 mm 24 mm x 100 mm 38 mm x 118 mm 15 mm x 72 mm x 150 mm
Part Number OAVBB2398 OAVBB16100 OAVBB24100 OAVBB38118 OAVBB70150
Input Pressure 20 psi - 100 max psi (0.13
MPa to 0.68 MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68 MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68 MPa)
20 psi - 100 max psi
(0.13 MPa to 0.68 MPa)
20 psi - 100 max psi (0.13
MPa to 0.68 MPa)
Ideal Load 374 N (84 lbs) 265 N (59.5 lbs) 398 N (89 lbs) 934 N (210 lbs) 2846 N (639.8 lbs)
Flow 2.2 SCFH 2.2 SCFH 2.3 SCFH 7 SCFH 1.4 NLPM
Fly Height 5 μ 5 μ 5 μ 5 μ 5 μ
Bearing Height 10 mm 10 mm 10 mm 12.5 mm 15 mm
Bearing Weight 51 g 38 g 56 g 129 g 320 g
Housing Material/
Finish
Aluminum/Anodized Aluminum/Anodized Aluminum/Anodized Aluminum/Anodized Aluminum/Anodized
Porous Material Carbon Carbon Carbon Carbon Carbon
Flatness 0.0005 mm (0.00002 in) 0.0005 mm (0.00002 in) 0.0005 mm (0.00002 in) 0.0005 mm (0.00002 in) 0.0005 mm (0.00002 in)
Pressure Port
Threads
M3 x 0.5 M3 x 0.5 M3 x 0.5 M5 x 0.8 M5 x 0.8
Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
OAV® TEMPERATURE CONTROLLED
THRUST AIR BUSHINGS
High-Temperature Thrust Air Bearings are made
for applications under exposure to extremely high
speeds, ambient temperatures, and very hot processes. The material type and fluid/airflow allow
for operation under these extreme environmental
conditions without the need to sacrifice precision
or quality. OAV Thrust Air Bearings preload both
the horizontal and vertical surfaces with opposing
thin films of pressure, maintaining the perfect gap
for ultimate tolerance. The surface design equally
distributes and pre-loads air over the entire surface
area, resulting in outstanding levels of stiffness and
maximized performance.
The temperature control bearings have three ports – the center port for bearing operating air, and ports on either
side the inlet and “exhaust” of temperature control fluid. Operating air and temperature control fluid do not interact withing the bearing. Any fluid can be used, but air is most common. Operating air inlet and circulating fluid inlet
should be independent feeds to control pressure, flow, and temperature as needed.
Extreme Temperature Conditions
At temperatures below freezing, water will be drawn out of the air and can crystallize internally, impeding flow and
degrading performance of the bearing. This crystallization can occur in both operating air and temp control fluid
when air is used. Severity and likelihood of occurrence are dependent on severity of temperature, operating pressures, flows, ambient humidity. This can be counter acted by using:
1) An in-line air heater
2) Compressed air dehumidifier
3) Pure compressed gas, such as helium or nitrogen (where practical), due to the homogenous state lacking water
contamination.
At high temperatures, maximum exposure temperature is dependent on application and precision needs, and control may be aided with refrigeration of air and circulating fluid.
TEMPERATURE CONTROLLED THRUST AIR BUSHINGS
Size 20 mm ID 50 mm ID
Part Number OAVTB60i20W OAVTB100i50W
Housing Material/Finish OAV Confidential 7075 Aircraft Quality
Aluminum/Mil Spec Hard
Anodize
Input Pressure 20 psi - 100 max psi
(0.13 MPa to 0.68 MPa)
20 psi - 100 max psi (0.13
MPa to 0.68 MPa)
Porous Material Carbon Carbon
Pressure Port Threads M3 x 0.5 M5 x 0.8
Lifetime Infinite Infinite
Radial Load Capacity 54.9 lbs (240.2 N) 871.4 N (195.9 lbs)
Thrust Load Capacity 84 lbs (373.7 N) 862.1 N (193.8 lbs)
Radial Stiffness 0.13 lbs/μin (23 N/μm) 0.63 lbs/μin (110 N/μm)
Pitch Moment Max 10 lbs-in (1.1 N-m) 46 lbs-in (5.2 N-m)
Bearing Inside Diameter
(ID)
20 mm 50.018 mm + .005/.000
Bearing Outside Diameter
(OD)
60 mm 100 mm
Bearing Length 79.2 mm 92 mm
Bearing Weight 435 g 550 g
Recommended Shaft Outside Diameter (OD)
20 mm - .02 mm 50 mm - .02 mm
Cooling Type Liquid or Cool Air flow Liquid or Cool Air flow
Cooling Flow rate 52.3 SCFH 67.3 SCFH
Temperature TBD TBD
Flow Rate 15.6 SCFH (7.4 NLPM) 28.5 SCFH (13.5 NLPM)
Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
OAV® FOIL AIR BEARINGS
FOIL THRUST AIR BEARINGS
Size 13 mm 20 mm 25 mm 40 mm
Part Number FB-T13-X57 FB-T20-X65 FB-T25-X75 FB-T40-X120
Lift Off Speed 5000 rpm 5000 rpm 5000 rpm 5000 rpm
Load Capacity 195 N 380 N 630 N 1350 N
Shaft Size 13 mm 20 mm 25 mm 40 mm
Bearing Width 2.95 mm 2.95 mm 2.95 mm 5.45 mm
Bearing OD 57 mm 65 mm 75 mm 120 mm
Rotation Direction CW or CCW CW or CCW CW or CCW CW or CCW
Generation 4th OAV Advanced 4th OAV Advanced 4th OAV Advanced 4th OAV Advanced
FOIL JOURNAL AIR BEARINGS
Size 13 mm 20 mm 25 mm 40 mm
Part Number FB-J13-L20 FB-J20-L25 FB-J25-L28 FB-J40-L35
Lift Off Speed 5000 rpm 5000 rpm 5000 rpm 5000 rpm
Load Capacity 160 N 380 N 520 N 1150 N
Shaft Size 13 mm 20 mm 25 mm 40 mm
Bearing Length 20 mm 25 mm 28 mm 35 mm
Rotation Direction CW or CCW CW or CCW CW or CCW CW and CCW
Generation 4th OAV Advanced 4th OAV Advanced 4th OAV Advanced 4th OAV Advanced
JOURNAL
THURUST
The development of foil bearings began in the early 1970s
to provide rotational guidance for gas turbine shafts. Foil
bearings, also known as a foil air bearings, is a type of air
bearing where the surface is supported by a compliant,
spring-loaded foil journal lining. Once the surface is spinning
fast enough, the air pushes the foil away from the surface
so that no contact and no wear occurs. The surface and foil
are separated by the high pressure from the air, generated
by the rotation that pulls gas into the bearing via the viscosity effects. OAV Foil Bearings can operate under the most
demanding systems without the requirement for external
supply. OAV’s advanced method makes the OAV Foil Bearings unmatchable.
OAV Foil Bearings are suitable for many high-speed
applications such as turbomachinery, aircraft, microturbine
generators, and high-speed projects.
It gives many advantages from higher efficiency, to increased
reliability, higher speed capabilities, and quieter operations.
OAV Foil Bearings are oil free and offer wide operating
temperature ranges, high vibration and shock load capacity,
and no scheduled maintenance.
Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
Web: https://www.rstbearing.com.cn
Tel: 024 22945833 22923833 24853899 Fax: 024 88729249 Mobile: 13940483518 15640413155（微信）
沈阳瑞思达轴承有限公司 SHENYANG TOTAL BEARING CO.,LTD.
