Four-row tapered roller bearings

Principal dimensions Basic load ratings Designation

dynamic static Original designation Current designation

249

Dimensions Calculation Mass

factors

250

Four-row tapered roller bearings

Principal dimensions Basic load ratings Designation

dynamic static Original designation Current designation

251

Dimensions Calculation Mass

factors

252

Four-row tapered roller bearings(Inch design)

Principal dimensions Basic load ratings Designation

dynamic static

253

Dimensions Calculation Mass

factors

254

Four-row tapered roller bearings(Inch design)

Principal dimensions Basic load ratings Designation

dynamic static

255

Dimensions Calculation Mass

factors

256

Four-row tapered roller bearings(Inch design)

Principal dimensions Basic load ratings Designation

dynamic static

257

Dimensions Calculation Mass

factors

258

Four-row tapered roller bearings(Inch design)

Principal dimensions Basic load ratings Designation

dynamic static

259

Dimensions Calculation Mass

factors

260

Four-row tapered roller bearings(Inch design)

Principal dimensions Basic load ratings Designation

dynamic static

261

Dimensions Calculation Mass

factors

262

Four-row tapered roller bearings(Inch design)

Principal dimensions Basic load ratings Designation

dynamic static

263

Dimensions Calculation Mass

factors

264

266

267

303

补充代号

球面滚子轴承

............................................................................................................

.......................................................................................

密封球面滚子轴承 .............................................................................

Sealed spherical roller bearings

Spherical roller bearings

Designation system

265

TMB EXTRA

TMB拥有30余年材料冶炼技术,与各大高

校研究院合作，研制出新型轴承钢材料。配

合以“D”、“DH\"特殊热处理工艺，TMB EXT

-RA轴承拥有比常规轴承更长的寿命、耐高

温、旋转精度高、低噪音的优点。得益于优

秀的性能，TMB EXTRA 轴承适用于各种高

精度，高要求工况，并已成熟配套多家国内

外高端用户。更多细节敬请咨询当地TMB销

售人员及代理商。

Designation system

CA：Retaining flanges on the inner

ring, guide ring centred on the inner ring,

machined brass cage

CC：Flangeless inner ring, guide ring

centred on the inner ring, two stamped

steel cages

E：Optimized internal design for

increased load carrying capacity

K：Tapered bore, taper 1:12

K30：Tapered bore, taper 1:30

MB：Manhined brass cage,inner ring

centred

W：Without annular groove and

lubrication holes in the outer ring

W20：Three lubrication holes in the

outer ring

W26：Six lubrication holes in the inner

ring

W33：Annular groove and three

lubrication holes in the outer ring

C2：Radial internal clearance smaller

than Normal

C3：Radial internal clearance greater

than Normal

C4：Radial internal clearance greater

than C3

C5：Radial internal clearance greater

than C4

P5：Dimensional and running accuracy to P5 tolerance class

P6：Dimensional and running accuracy to P6 tolerance class

P62：P6 + C2

266

Principal dimensions

Fatigue load limit

Basic load ratings Limiting Speeds Mass Designation

dynamic static Grease Oil cylindrical bore tapered bore

Spherical roller bearings

267

Dimensions Abutment and fillet dimensions

min. min. max. max.

Calculation factors

268

Spherical roller bearings

Principal dimensions

Fatigue load limit

Basic load ratings Limiting Speeds Mass Designation

dynamic static Grease Oil cylindrical bore tapered bore

269

Dimensions Abutment and fillet dimensions

min. min. max. max.

Calculation factors

270

Spherical roller bearings

Principal dimensions

Fatigue load limit

Basic load ratings Limiting Speeds Mass Designation

dynamic static Grease Oil cylindrical bore tapered bore

271

Dimensions Abutment and fillet dimensions

min. min. max. max.

Calculation factors

272

Principal dimensions

Fatigue load limit

Basic load ratings Limiting Speeds Mass Designation

dynamic static Grease Oil cylindrical bore tapered bore

Spherical roller bearings

273

Dimensions Abutment and fillet dimensions

min. min. max. max.

Calculation factors

274

Principal dimensions

Fatigue load limit

Basic load ratings Limiting Speeds Mass Designation

dynamic static Grease Oil cylindrical bore tapered bore

Spherical roller bearings

275

Dimensions Abutment and fillet dimensions

min. min. max. max.

Calculation factors

276

Principal dimensions

Fatigue load limit

Basic load ratings Limiting Speeds Mass Designation

dynamic static Grease Oil cylindrical bore tapered bore

Spherical roller bearings

277

Dimensions Abutment and fillet dimensions

min. min. max. max.

Calculation factors

278

Principal dimensions

Fatigue load limit

Basic load ratings Limiting Speeds Mass Designation

dynamic static Grease Oil cylindrical bore tapered bore

Spherical roller bearings

279

Dimensions Abutment and fillet dimensions

min. min. max. max.

Calculation factors

280

Principal dimensions

Fatigue load limit

Basic load ratings Limiting Speeds Mass Designation

dynamic static Grease Oil cylindrical bore tapered bore

Spherical roller bearings

281

Dimensions Abutment and fillet dimensions

min. min. max. max.

Calculation factors

282

Principal dimensions

Fatigue load limit

Basic load ratings Limiting Speeds Mass Designation

dynamic static Grease Oil cylindrical bore tapered bore

Spherical roller bearings

283

Dimensions Abutment and fillet dimensions

min. min. max. max.

Calculation factors

284

Principal dimensions

Fatigue load limit

Basic load ratings Limiting Speeds Mass Designation

dynamic static Grease Oil cylindrical bore tapered bore

Spherical roller bearings

285

Dimensions Abutment and fillet dimensions

min. min. max. max.

Calculation factors

286

Principal dimensions

Fatigue load limit

Basic load ratings Limiting Speeds Mass Designation

dynamic static Grease Oil cylindrical bore tapered bore

Spherical roller bearings

287

Dimensions Abutment and fillet dimensions

min. min. max. max.

Calculation factors

288

Principal dimensions

Fatigue load limit

Basic load ratings Limiting Speeds Mass Designation

dynamic static Grease Oil cylindrical bore tapered bore

Spherical roller bearings

289

Dimensions Abutment and fillet dimensions

min. min. max. max.

Calculation factors

290

Principal dimensions

Fatigue load limit

Basic load ratings Limiting Speeds Mass Designation

dynamic static Grease Oil cylindrical bore tapered bore

Spherical roller bearings

291

Dimensions Abutment and fillet dimensions

min. min. max. max.

Calculation factors

292

Principal dimensions

Fatigue load limit

Basic load ratings Limiting Speeds Mass Designation

dynamic static Grease Oil cylindrical bore tapered bore

Spherical roller bearings

293

Dimensions Abutment and fillet dimensions

min. min. max. max.

Calculation factors

284

Principal dimensions

Fatigue load limit

Basic load ratings Limiting Speeds Mass Designation

dynamic static Grease Oil cylindrical bore tapered bore

Spherical roller bearings

295

Dimensions Abutment and fillet dimensions

min. min. max. max.

Calculation factors

296

Principal dimensions

Fatigue load limit

Basic load ratings Limiting Speeds Mass Designation

dynamic static Grease Oil cylindrical bore tapered bore

Spherical roller bearings

297

Dimensions Abutment and fillet dimensions

min. min. max. max.

Calculation factors

298