Sitemap: TAPS, DIES, DIENUTS, Drills, Reamers, Milling Cutters, Slitting Saws, Toolbits

The Tap & Die Co
445 West Green Road
London N15 3PL - UK
Tel:+44 (0)20 88881865
Fax:+44 (0)20 88884613
Email:
sales@tapdie.com

www.tapdie.com

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Established since 1978

CURRENCY Converter

SITEMAP

SFM to RPM

Surface Feet Per Minute (SFM) to Revolutions Per Minute (RPM)
Conversion Chart:

 FORMULA:
 The speeds shown are given in Surface Feet Per Minute (SFM) or Surface Meters Per Minute (m/min), measured at the periphery of thedrill. To calculate thedrill revolutions per minute (RPM) from the surface speeds, the following formulae should be used, where D=diameter of drill

SFM  =  RPM x DIAMETER x 0.262

 RPM  =  (SFM x 3.82)    divided by    DIAMETER
 


SFM
 

RPM

CUTTING DIAMETER

1/8”

1/4”

3/8”

1/2”

5/8”

3/4”

7/8”

1”

10

305

153

102

76

61

51

44

38

15

458

229

153

115

92

76

65

57

20

611

305

204

153

122

102

87

76

25

763

382

254

191

153

127

109

95

30

916

458

305

229

183

153

131

115

35

1069

534

356

267

214

178

153

134

40

1221

611

407

305

244

204

174

153

45

1374

687

458

344

275

229

196

172

50

1527

763

509

382

305

254

218

191

60

1832

916

611

458

366

305

262

229

70

2137

1069

712

534

427

356

305

267

80

2443

1221

814

611

489

407

349

305

90

2748

1374

916

687

550

458

393

344

100

3053

1527

1018

763

611

509

436

382

150

4580

2290

1527

1145

916

763

654

573

200

6107

3053

2036

1527

1221

1018

872

763

250

7634

3817

2545

1908

1527

1272

1091

954

300

9160

4580

3053

2290

1832

1527

1309

1145

350

10687

5344

3562

2672

2137

1781

1527

1336

400

12214

6107

4071

3053

2443

2036

1745

1527

450

13740

6870

4580

3435

2748

2290

1963

1718

500

15267

7634

5089

3817

3053

2545

2181

1908

600

18321

9160

6107

4580

3664

3053

2617

2290

700

21374

10687

7125

5344

4275

3562

3053

2672

800

24427

12214

8142

6107

4885

4071

3490

3053

900

27481

13740

9160

6870

5496

4580

3926

3453

1000

30534

15267

10178

7634

6107

5089

4362

3817

1100

33588

16794

11196

8397

6716

5598

4798

4198

1200

36641

18321

12214

9160

7328

6107

5234

4590

1300

39695

19847

13232

9924

7939

6616

5671

4962

1400

42748

21374

14249

10687

8550

7125

6107

5344

1500

45802

22901

15267

11450

9160

7634

643

5725

1600

48855

24427

16285

12214

9771

8142

6979

6107

1700

51908

25954

17303

12977

10382

8651

7415

6489

1800

54962

27481

18321

13740

10992

9160

7852

6870

1900

58015

29008

19338

14504

11603

9669

8288

7252

2000

61069

30534

20356

15267

12214

10178

8724

7634

Surface Meters Per Minute (m/min) to Revolutions Per Minute (RPM)
Conversion Chart:

 FORMULA:
 The speeds shown are given in Surface Feet Per Minute (SFM) or Surface Meters Per Minute (m/min), measured at the periphery of thedrill. To calculate thedrill revolutions per minute (RPM) from the surface speeds, the following formulae should be used, where D=diameter of drill

m/min  =  3.142 x DIAMETER x RPM    dived by   1000

 RPM  =  (1000 x m/min)    divided by    3.142 x DIAMETER
 


SFM
 

RPM

CUTTING DIAMETER

3mm

5mm

10mm

12mm

16mm

18mm

20mm

25mm

10

1.06

0.53

0.32

0.265

0.20

0.175

0.16

0.125

20

2.12

1.06

0.63

0.53

0.40

0.35

0.32

0.25

40

4.24

2.12

1.27

1.06

0.795

0.71

0.53

0.31

60

6.35

3.18

1.90

1.59

1.19

1.06

0.95

0.76

80

6.49

4.24

2.54

2.128

1.59

1.41

1.27

1.02

100

10.60

5.30

3.18

2.65

1.95

1.77

1.54

1.27

150

15,91

7.95

4.77

3.98

2.98

3.83

2.39

1.91

200

21,21

10.60

5.36

5.30

3.98

3.53

3.18

2.54

250

26,52

13.26

7.95

6.63

4.97

4.42

3.98

3.18

300

31,82

15.91

9.55

7.95

5.97

5.38

4.77

3.82

350

37,13

18.56

11.14

9.28

6.96

6.19

5.57

4.45

400

42,43

21.21

12.73

10.81

7.96

7.07

6.36

4.09

450

47,74

23.82

14.32

11.93

8.95

7.96

7.16

4.73

500

53,04

26.52

15.91

13.26

9.94

8.64

7.95

6.36

550

58,35

29.17

17.50

14.59

10.94

9.72

8.75

7.00

600

63,65

31.82

19.09

15.91

11.93

10.61

9.55

7.64

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