Location : Products >>BONDED ABRASIVES >> Conversion table-wheel speeds
 
 Revolutions Per Minute for Various Diameters of Abrasive Wheels to Give Surface Speed

Diam. of wheel in inches

Surface Speed in per Minute

Diam. of Wheel in MM

4,000

4,500

5,000

5.500

6,600

6,500

7,000

7,500

8,000

8,500

9,000

9,500

10,000

12,000

12,500

14,200

16,000

16,500

17,000

Surface Speed in Meters per Second

20.319

22.859

25.399

27.938

30.478

33.018

35.558

38.098

40.638

43.177

45.717

48.257

50.797

60.956

63.496

72.136

81.275

83.816

86.356

Revolutions per Minute

1

15,279

17,189

19,099

21,008

22,918

24,828

26,738

28,648

30,558

32,468

34,377

36,287

38,197

45,837

47,746

54,240

61,115

63,025

64,935

25.40

1.5

10,186

11,459

12,732

14,006

15,279

16,552

17,825

19,099

20,372

21,645

22,918

24,192

25,465

30,558

31,831

36,160

40,744

42,017

43,290

38.10

2

7,639

8,594

9,549

10,504

11,459

12,414

13,369

14,324

15,279

16,234

17,189

18,144

19,099

22,918

23,873

27,120

30,558

31,513

32,468

50.80

2.5

6,112

6,875

7,639

8,403

9,167

9,931

10,695

11,459

12,223

12,987

13,751

14,515

15,279

18,335

19,099

21,696

24,446

25,210

25,974

63.50

3

5,093

5,730

6,366

7,003

7,639

8,276

8,913

9,549

10,186

10,823

11,459

12,096

12,732

15,279

15,915

18,080

20,372

21,008

21,645

76.20

3.5

4,365

4,911

5,457

6,002

6,548

7,094

7,639

8,185

8,731

9,276

9,822

10,368

10,913

13,096

13,642

15,497

17,462

18,007

18,553

88.90

4

3,820

4,297

4,775

5,252

5,730

6,207

6,685

7,162

7,639

8,117

8,594

9,072

9,549

11,459

11,937

13,560

15,279

15,756

16,234

101.60

5

3,056

3,438

3,820

4,202

4,584

4,966

5,348

5,730

6,112

6,494

6,875

7,257

7,639

9,167

9,549

10,848

12,223

12,605

12,987

127.00

6

2,546

2,865

3,183

3,501

3,820

4,138

4,456

4,775

5,093

5,411

5,730

6,048

6,366

7,639

7,958

9,040

10,186

10,504

10,823

152.39

7

2,183

2,456

2,728

3,001

3,274

3,547

3,820

4,093

4,365

4,638

4,911

5,184

5,457

6,548

6,821

7,749

8,731

9,004

9,276

177.79

8

1,910

2,149

2,387

2,626

2,865

3,104

3,342

3,581

3,820

4,058

4,297

4,536

4,775

5,730

5,968

6,780

7,639

7,878

8,117

203.19

9

1,698

1,910

2,122

2,334

2,546

2,759

2,971

3,183

3,395

3,608

3,820

4,032

4,244

5,093

5,305

6,027

6,791

7,003

7,215

228.59

10

1,528

1,719

1,910

2,101

2,292

2,483

2,674

2,865

3,056

3,247

3,438

3,629

3,820

4,584

4,775

5,424

6,112

6,303

6,494

253.99

12

1,273

1,432

1,592

1,751

1,910

2,069

2,228

2,387

2,546

2,706

2,865

3,024

3,183

3,820

3,979

4,520

5,093

5,252

5,411

304.79

14

1,091

1,228

1,364

1,501

1,637

1,773

1,910

2,046

2,183

2,319

2,456

2,592

2,728

3,274

3,410

3,874

4,365

4,502

4,638

355.59

16

955

1,074

1,194

1,313

1,432

1,552

1,671

1,790

1,910

2,029

2,149

2,268

2,387

2,865

2,984

3,390

3,820

3,939

4,058

406.38

18

849

955

1,061

1,167

1,273

1,379

1,485

1,592

1,698

1,804

1,910

2,016

2,122

2,546

2,653

3,013

3,395

3,501

3,608

457.18

20

764

859

955

1,050

1,146

1,241

1,337

1,432

1,528

1,623

1,719

1,814

1,910

2,292

2,387

2,712

3,056

3,151

3,247

507.98

22

694

781

868

955

1,042

1,129

1,215

1,302

1,389

1,476

1,563

1,649

1,736

2,083

2,170

2,465

2,778

2,865

2,952

558.78

24

637

716

796

875

955

1,035

1,114

1,194

1,273

1,353

1,432

1,512

1,592

1,910

1,989

2,260

2,546

2,626

2,706

609.58

26

588

661

735

808

881

955

1,028

1,102

1,175

1,249

1,322

1,396

1,469

1,763

1,836

2,086

2,351

2,424

2,498

660.37

28

546

614

682

750

819

887

955

1,023

1,091

1,160

1,228

1,296

1,364

1,637

1,705

1,937

2,183

2,251

2,319

711.17

30

509

573

637

700

764

828

891

955

1,019

1,082

1,146

1,210

1,273

1,528

1,592

1,808

2,037

2,101

2,165

761.97

32

477

537

597

657

716

776

836

895

955

1,015

1,074

1,134

1,194

1,432

1,492

1,695

1,910

1,970

2,029

812.77

34

449

506

562

618

674

730

786

843

899

955

1,011

1,067

1,123

1,348

1,404

1,595

1,798

1,854

1,910

863.57

36

424

477

531

584

637

690

743

796

849

902

955

1,008

1,061

1,273

1,326

1,507

1,698

1,751

1,804

914.36

38

402

452

503

553

603

653

704

754

804

854

905

955

1,005

1,206

1,256

1,427

1,608

1,659

1,709

965.16

40

382

430

477

525

573

621

668

716

764

812

859

907

955

1,146

1,194

1,356

1,528

1,576

1,623

1,015.96

42

364

409

455

500

546

591

637

682

728

773

819

864

909

1,091

1,137

1,291

1,455

1,501

1,546

1,066.76

44

347

391

434

477

521

564

608

651

694

738

781

825

868

1,042

1,085

1,233

1,389

1,432

1,476

1,117.56

46

332

374

415

457

498

540

581

623

664

706

747

789

830

996

1,038

1,179

1,329

1,370

1,412

1,168.35

48

318

358

398

438

477

517

557

597

637

676

716

756

796

955

995

1,130

1,273

1,313

1,353

1,219.15

53

288

324

360

396

432

468

504

541

577

613

649

685

721

865

901

1,023

1,153

1,189

1,225

1,346.15

60

255

286

318

350

382

414

446

477

509

541

573

605

637

764

796

904

1,019

1,050

1,082

1,523.94

72

212

239

265

292

318

345

371

398

424

451

477

504

531

637

663

753

849

875

902

1,828.73

 Note:"Centrifugal Force," which is the force that tends to rupture a given wheel when overspeeding increase as  the square of the velocity of that wheel. For example, the centrifugal force in a wheel running at 5,500 surface  feet per minute is 49 per cent greater than in the same wheel running at 4,500 surface feet per minute, although the speed is actually only 22 per cent greater.
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