KOYO BEARING

GB-28 KOYO NEEDLE ROLLER BEARINGS

KOYO drawn cup needle roller bearings.

METRIC SERIES
When a rolling bearing is needed for a compact and economic design and where it is not practical to harden and grind the housing bore, or where the housing materials are of low rigidity such as cast iron, aluminum or even plastics – drawn cup needle roller bearings should be considered.

Get A Quote
Contact Us

KOYO NEEDLE ROLLER BEARINGS.

Various part numbers in stock, welcome inquiry. Fast shipment within 2-3 working days.

Bearing

bore

designation

    Mounting  
Nominal bore Nominal

O.D.

Shaft  raceway

diameter

Housing

bore

Max. Min. Max. Min.
  mm

in

mm

in

mm

in

mm

in

mm

in

mm

in

GB-2 3.175

0.1250

6.350

0.2500

3.178

0.1251

3.170

0.1248

6.281

0.2473

6.274

0.2470

GB-2 1/2 3.967

0.1562

7.142

0.2812

3.973

0.1564

3.965

0.1561

7.074

0.2785

7.066

0.2782

GB-3 4.763

0.1875

8.733

0.3438

4.765

0.1876

4.757

0.1873

8.611

0.3390

8.603

0.3387

GB-4 6.350

0.2500

11.113

0.4375

6.353

0.2501

6.345

0.2498

10.993

0.4328

10.986

0.4325

GB-5 7.938

0.3125

12.700

0.5000

7.940

0.3126

7.932

0.3123

12.581

0.4953

12.573

0.4950

GBH-5 7.938

0.3125

14.288

0.5625

7.940

0.3126

7.932

0.3123

14.168

0.5578

14.161

0.5575

GB-6 9.525

0.3750

14.288

0.5625

9.528

0.3751

9.520

0.3748

14.168

0.5578

14.161

0.5575

GBH-6 9.525

0.3750

15.875

0.6250

9.528

0.3751

9.520

0.3748

15.756

0.6203

15.748

0.6200

GB-7 11.113

0.4375

15.875

0.6250

11.115

0.4376

11.107

0.4373

15.756

0.6203

15.748

0.6200

GBH-7 11.113

0.4375

17.463

0.6875

11.115

0.4376

11.107

0.4373

17.343

0.6828

17.336

0.6825

GB-8 12.700

0.5000

17.463

0.6875

12.703

0.5001

12.695

0.4998

17.343

0.6828

17.336

0.6825

GBH-8 12.700

0.5000

19.050

0.7500

12.703

0.5001

12.695

0.4998

18.931

0.7453

18.923

0.7450

GB-9 14.288

0.5625

19.050

0.7500

14.290

0.5626

14.282

0.5623

18.931

0.7453

18.923

0.7450

GBH-9 14.288

0.5625

20.638

0.8125

14.290

0.5626

14.282

0.5623

20.518

0.8078

20.511

0.8075

GB-10 15.875

0.6250

20.638

0.8125

14.878

0.6251

15.870

0.6248

20.518

0.8078

20.511

0.8075

GBH-10 15.875

0.6250

22.225

0.8750

14.878

0.6251

15.870

0.6248

22.106

0.8703

22.098

0.8700

GB-11 17.463

0.6875

22.225

0.8750

17.465

0.6876

17.457

0.6873

22.106

0.8703

22.098

0.8700

GBH-11 17.463

0.6875

23.813

0.9375

17.465

0.6876

17.457

0.6873

23.693

0.9328

23.686

0.9325

GB-12 19.050

0.7500

25.400

1.0000

19.053

0.7501

19.045

0.7498

25.281

0.9953

25.273

0.9950

GBH-12 19.050

0.7500

26.988

1.0625

19.053

0.7501

19.045

0.7498

26.868

1.0578

26.861

1.0575

GB-13 20.638

0.8125

26.988

1.0625

20.640

0.8126

20.632

0.8123

26.868

1.0578

26.861

1.0575

GBH-13 20.638

0.8125

28.575

1.1250

20.640

0.8126

20.632

0.8123

28.456

1.1203

28.448

1.1200

GB-14 22.225

0.8750

28.575

1.1250

22.228

0.8751

22.220

0.8748

28.456

1.1203

28.448

1.1200

GBH-14 22.225

0.8750

30.163

1.1875

22.228

0.8751

22.220

0.8748

30.046

1.1829

30.036

1.1825

Bearing

bore

designation

    Mounting  
Nominal bore Nominal

O.D.

Shaft  raceway

diameter

Housing

bore

Max. Min. Max. Min.
  mm

in

mm

in

mm

in

mm

in

mm

in

mm

in

GB-15 23.813

0.9375

30.163

1.1875

23.815

0.9376

23.807

0.9373

30.046

1.1829

30.036

1.1825

GB-16 25.400

1.0000

31.750

1.2500

25.403

1.0001

25.395

0.9998

31.633

1.2454

31.623

1.2450

GBH-16 25.400

1.0000

33.338

1.3125

25.403

1.0001

25.395

0.9998

33.221

1.3079

33.211

1.3075

GB-17 26.988

1.0625

33.338

1.3125

26.990

1.0626

26.982

1.0623

33.221

1.3079

33.211

1.3075

GB-18 28.575

1.1250

34.925

1.3750

28.578

1.1251

28.570

1.1248

34.808

1.3704

34.798

1.3700

GBH-18 28.575

1.1250

38.100

1.5000

28.578

1.1251

28.570

1.1248

37.986

1.4955

37.973

1.4950

GB-19 30.163

1.1875

38.100

1.5000

30.165

1.1876

30.157

1.1873

37.986

1.4955

37.973

1.4950

GB-20 31.750

1.2500

38.100

1.5000

31.753

1.2501

31.745

1.2498

37.986

1.4955

37.973

1.4950

GBH-20 31.750

1.2500

41.275

1.6250

31.753

1.2501

31.745

1.2498

41.161

1.6205

41.148

1.6200

GB-21 33.338

1.3125

41.275

1.6250

33.340

1.3126

33.332

1.3123

41.161

1.6205

41.148

1.6200

GB-22 34.925

1.3750

41.275

1.6250

34.925

1.3750

34.917

1.3747

41.161

1.6205

41.148

1.6200

GBH-22 34.925

1.3750

44.450

1.7500

34.925

1.3750

34.917

1.3747

44.336

1.7455

44.323

1.7450

GB-24 38.100

1.5000

47.625

1.8750

38.100

1.5000

38.092

1.4997

47.511

1.8705

47.498

1.8700

GB-26 41.275

1.6250

50.800

2.0000

41.275

1.6250

41.267

1.6247

50.686

1.9955

50.673

1.9950

GB-28 44.450

1.7500

53.975

2.1250

44.450

1.7500

44.442

1.7497

53.861

2.1205

53.848

2.1200

GB-30 47.625

1.8750

57.150

2.2500

47.625

1.8750

47.617

1.8747

57.036

2.2455

57.023

2.2450

GB-32 50.800

2.0000

60.325

2.3750

50.800

2.0000

50.792

1.9997

60.211

2.3705

60.198

2.3700

GBH-33 52.388

2.0625

64.293

2.5312

52.385

2.0624

52.377

2.0621

64.178

2.5267

64.166

2.5262

GB-34 53.975

2.1250

63.500

2.5000

53.973

2.1249

53.965

2.1246

63.386

2.4955

63.373

2.4950

GB-36 57.150

2.2500

66.675

2.6250

57.148

2.2499

57.140

2.2496

66.561

2.6205

66.548

2.6200

GB-42 66.675

2.6250

76.200

3.0000

66.670

2.6248

66.662

2.6245

76.088

2.9956

76.073

2.9950

GB-44 69.850

2.7500

79.375

3.1250

69.845

2.7498

69.837

2.7495

79.263

3.1206

79.248

3.1200

GB-56 88.900

3.5000

101.600

4.0000

88.895

3.4998

88.887

3.4995

101.488

3.9956

101.473

3.9950

WHCD Bearing Co.,Ltd is professional bearing supplier, engaged in bearing business with more than eighteen years, export to worldwide countries, as America, European, Middle-East, Southeast Asia …etc. with plenty long-term cooperation customers. WHCD Bearing company will provide professional and prompt solution for customers.Original Quality and Warranted, and Bearing experts team support customer service. Various bearing types for customer choose:  

Bearing Types:
Self-aligning ball bearing
Cylindrical roller bearing
Spherical roller bearing
Tapered roller bearing
Angular contact ball
Needle roller
Deep groove ball bearing
Axial deep groove ball
Pillow block bearing and units
LM/Linear Guide
Product Inquiry Form
Scroll to Top