Four-row tapered roller bearings


Four row tapered roller bearings are the one kind of roll neck bearings, their radial and axial loading capacity are high, can carry heavy axail loads in two directions, and their radial loading capacity is 3 times heavier than single row tapered roller b

Four row tapered roller bearings are the one kind of roll neck bearings, their radial and axial loading capacity are high, can carry heavy axail loads in two directions, and their radial loading capacity is 3 times heavier than single row tapered roller bearings, but limiting speed is lower. They can be used as axial locating bearings in two directions because they are able to limit axial displacement in two directions within axial clearance. The radial and axial clearance also can be adjusted by changing the width of spacer between inner and outer rings.

Four-row tapered roller bearings are used successfully worldwide for rolling mill bearing arrangements where rolling speeds are slow to moderate. They are mainly used in the working roll necks of hot or cold rolling mills, and roll neck of cogging mills. They usually clearance fit with roll necks to being mounted and dismounted conveniently.

Steel pressed cages are usually used in four row tapered roller bearings, and pin type cages are for large size taper bearings.

We supplies many sizes of four row tapered roller bearings with integral radial shaft seals at both sides. They are available in several designs depending on bearing size as well as on the open (non-sealed) basic design.

Boundary dimensions

Basic load ratings

Designations

Mass

Limiting speeds

mm

kN

Current

Original

kg

r/min

d

D

T

rmin

r1min

Cr

Cor

Grease

Oil

150

210

165

2.5

2

700

1700

382930

2077930

16.5

670

850

 

212

155

3

2.5

964

2350

30630

-

16.8

670

850

160

220

165

2.5

2

795

2090

382932

2077932

18.5

670

850

 

265

173

3

2.5

1450

2760

380632

-

35.7

670

850

170

240

175

3

2.5

1210

3000

380634

-

24.2

670

850

 

260

230

3

2.5

907

1720

382034

2077134

39.5

670

850

180

250

185

2.5

2

1280

3400

382936

-

27.5

670

850

 

260

160

2.5

2

1140

2550

380636

-

26.7

670

850

200

282

206

3

2.5

1680

2510

380640

-

42.1

560

700

 

310

200

3

2.5

1660

3100

382040X2

2077140

55.6

560

700

 

310

275

3

2.5

1760

4200

382040

2077140

75.1

560

700

205

320

205

3

3

1590

3260

380641

77741

57

500

630

220

340

305

4

3

2070

5430

382044

2077144

97.9

500

630

225

320

230

2.5

2

1910

5000

380645

77745

58

500

630

230

315

190

2.5

2

1600

4310

380646

77746

42.5

500

630

240

360

310

4

3

2110

5610

382048

2077148

90.5

450

560

250

385

255

5

4

2870

6450

381050

77150

107

380

480

260

360

265

3

2.5

1760

5220

382952

2077952

76.3

450

560

 

400

255

4

7.5

2300

5000

380652

77752

114

490

600

 

400

345

5

4

2960

7380

382052

2077152

153

430

530

 

440

300

2

5

3550

8200

380152

777752

164

450

560

280

395

288

5

5

3051

8320

380656

-

108

450

560

 

420

250

5

5

2780

5700

380656X2

77756

119

450

560

 

460

324

5

4

2840

7290

381156

1077756

200

360

450

300

420

300

4

3

2330

7210

382960

2077960

130

380

480

 

420

310

4

3

3250

8150

380660

77860

134

380

480

 

460

390

5

4

3180

9330

382060

2077160

238

360

450

 

500

350

5

4

2980

6950

381160X2

77760

286

340

430

 

500

370

5

4

3390

8710

381160

1077760

285

340

430

320

460

338

4

4

2950

8200

380664

77764

180

360

450

 

460

380

4

4

3100

8750

380664X2

77864

218

360

450

 

480

390

5

4

3180

9330

382064

2077164

234

340

430

 

540

364

5

5

6330

14400

381164X2

-

347

340

430

340

460

310

4

3

2480

8100

382968

2077968

145

340

430

 

480

350

5

5

4400

12600

380668

-

195

320

400

 

520

325

5

4

3100

8620

381068

77168

234

320

400

 

580

425

5

4

4580

11700

381168

1077768

441

280

360

350

590

420

2

5

4700

9700

380670

77770

475

280

360

355

490

316

4

4

4520

12200

380671

-

115

320

400


Boundary dimensions

Basic load ratings

Designations

Mass

Limiting speeds

mm

kN

Current

Original

kg

r/min

d

D

T

rmin

r1min

Cr

Cor

Grease

Oil

360

480

310

4

3

2760

8300

382972

2077972

149

340

430

 

480

375

3

3

3010

7870

382972X2

77872

189

340

430

 

520

370

4

4

5560

14600

380672

-

253

300

380

 

540

325

5

4

3388

8840

381072

77172

248

300

380

 

540

360

5

5

5070

12500

381072X2

-

274

300

380

 

600

420

6

6

7900

14000

381172

1077772

388

280

360

 

600

540

5

5

9970

24900

381172X2

-

620

240

360

370

490

292

3

3

3800

11600

380674

-

149

340

430

380

520

400

4

3

5560

16100

380676

-

240

280

380

 

550

350

5

5

5250

13100

380676

77776

273

280

380

 

560

325

5

4

3360

8840

381076

77176

281

280

380

 

560

360

5

5

5730

14000

381076X2

-

294

280

360

 

620

388

6

6

4200

9500

381176X2

3077776

443

240

360

 

620

420

5

4

4710

12300

381176

1077776

519

240

360

395

545

288.7

4

7.5

2610

7490

380679

77779

194

280

360

400

540

280

4

4

3100

8750

380680

77880

175

280

360

 

600

356

5

4

4160

10400

381080

77180

317

240

320

420

620

356

5

4

4160

10400

381084

77184

358

220

300

 

700

480

6

5

6780

18500

381184

1077784

760

190

260

 

760

500

7.5

7.5

9350

20300

380684

77884

1039

180

240

440

620

454

6

6

3960

7880

380688

77888

440

200

280

 

650

355

6

6

4290

12390

380088

77788

385

200

280

 

650

376

6

5

4330

13700

381088

77188

401

200

280

460

620

310

4

3

3360

10200

381992

1077992

232

200

280

 

650

474

6

6

5292

11270

380692

77892

495

180

240

 

680

410

6

5

5130

14200

381092

77192

476.

180

240

 

730

440

4

7.5

6500

15100

380692X3

77792

694

170

220

475

660

450

5

5

7330

22400

380695

77795

457

170

220

480

650

338

5

4

2450

5400

381996

1077996

301

190

260

 

678

494

6

6

10600

31900

380696

-

578

170

220

 

700

342

6

6

7050

17900

381096X2

-

447

170

220

 

700

420

6

5

5780

16900

381096

77196

547

170

220

 

790

510

7.5

7.5

11570

26900

381196X2

-

1017

120

160

490

625

385

4

4

5070

17670

380698

-

282

170

220

500

720

420

6

5

6650

19400

3810/500

771/500

565

160

200

 

830

540

7.5

7.5

13230

33000

3811/500X2

-

1194

120

160

508

762

420

6

6

9050

23900

3806/508

-

684

160

200

520

735

535

6

6

10580

33400

3806/520

-

721

160

200

530

780

450

6

5

7520

21500

3810/530

771/530

744

140

180

 

870

560

7.5

7.5

14400

36150

3811/530X2

-

1342

120

160

 

870

590

7.5

6

9300

26100

3811/530

10777/530

1422

120

160

 

880

544

7.5

7.5

10500

25600

3806/530

30777/530

1350

120

160

540

690

400

5

5

4860

17300

-

779/540

375

160

200

560

730

410

4

6

5560

18900

3828/560X

-

441

140

180


Boundary dimensions

Basic load ratings

Designations

Mass

Limiting speeds

mm

kN

Current

Original

kg

r/min

d

D

T

rmin

r1min

Cr

Cor

Grease

Oil

560

750

368

5

4

4370

13300

3819/560

10779/560

456

140

180

 

920

620

7.5

6

11200

26100

3811/560

10777/560

1635

100

140

600

800

365

5

5

5000

17800

-

779/600

489

120

160

 

800

380

5

4

5500

18900

3819/600

10779/600

536

120

160

 

855

620

6

6

14700

48100

3806/600

-

1155

100

140

 

870

415

6

6

9790

27200

3810/600X2

-

831

100

140

 

870

480

6

5

8370

25400

3810/600

771/600

995

100

140

 

980

615

7.5

6

17600

45600

3811/600X2

-

1865

90

120

 

980

650

7.5

6

12700

36700

3811/600

10777/600

1970

90

120

625

815

480

5

5

10400

31700

3806/625

777/625

647

100

140

630

850

418

6

5

6440

19800

3819/630

10779/630

720

100

140

 

890

650

7.5

7.5

16970

53800

3806/630

-

1293

100

140

 

920

515

7.5

6

9170

26800

3810/630

771/630

1158

95

130

 

920

600

7.5

7.5

16500

48200

3810/630X2

-

1342

90

120

 

1030

645

7.5

7.5

20270

53160

3811/630X2

-

2162

85

110

 

1030

670

7.5

6

14400

39900

3811/630

10777/630

2170

85

110

650

1030

560

7.5

12

11460

22050

3806/650

777/650

1769

85

110

660

1070

650

7.5

7.5

12600

26500

3806/660

777/660

2282

80

100

670

900

412

6

5

6940

22300

3819/670

10779/670

959

95

130

 

950

700

7.5

7.5

19800

61900

3806/670

-

1599

90

120

 

980

475

7.5

7.5

13880

36500

3810/670X2

-

1224

90

120

 

1090

690

7.5

7.5

22700

58800

3811/670X2

-

2566

75

95

 

1090

710

7.5

6

15700

39900

3811/670

10777/670

2665

75

95

710

1030

490

7.5

7.5

14500

40600

3810/710X2

-

1372

75

95

 

1030

555

7.5

6

11200

35800

3810/710

771/710

1568

75

95

 

1150

710

9.5

8

24500

65000

3811/710X2

-

2931

48

80

 

1150

750

9.5

8

15840

33960

3811/710

10777/710

3227

48

80

730

1035

755

7.5

7.5

22500

73200

3806/730

-

2043

75

95

750

1090

515

7.5

6

16200

45600

3810/750X2

-

1619

70

90

 

1090

605

7.5

6

13100

42400

3810/750

771/750

1874

70

90

 

1130

690

7.5

7.5

19000

51700

3806/750

777/750

2516

48

80

 

1220

750

9.5

8

27430

7380

3811/750X2

-

3504

48

80

 

1220

840

9.5

8

21900

68000

3811/750

10777/750

3994

48

80

774

1130

690

4

7.5

16700

50100

-

777/774

2400

48

80

780

1220

840

9.5

8

28400

74000

3806/780

779/780

3659

48

80

800

1120

820

7.5

7.5

26200

86300

3806/800

-

2842

-

-

840

1170

840

7.5

7.5

26300

86400

3806/840

-

2840

-

-

850

1360

900

12

9.5

38900

140600

3811/850

10777/850

5168

-

-

950

1360

880

7.5

6

23300

83600

3820/950

20771/950

4087

-

-

1060

1500

1000

9.5

8

29100

105000

3820/1060

20771/1060

5698

-

-

1070

1400

889.762

4

12

27270

90000

BT4B 328100

-

3730

-

-

1080

1450

950

5

12

30240

97200

BT4B 331559

-

4450

-

-

1250

1550

890

5

12

27270

102600

BT4B 328819

-

3820

-

-

1260

1640

1000

5

12

35190

128700

BT4B 332124

-

5800

-

-

1300

1720

1040

5

12

38610

126000

BT4B 331950

-

7000

-

-

1500

1900

1080

4

12

42120

153000

BT4B 332078

-

7700

-

-

1580

1960

1080

5

12

41130

158400

BT4B 331934

-

7800

-

-