Robert Speck Ltd
Little Ridge
Whittlebury Road
Silverstone
Northamptonshire
NN12 8UD
United Kingdom
Tel (+44) (0)1327 857307
Fax (+44) (0)1327 858166
 
 
 
 

Chart Drill / Tap Sizes

Thread
size

Drill
dia

Collet
dia

Normal
Drilling
Speed
RPM

Motor
Power

Kw

Tapping
speed

Material
thickness

Toque
Nm

Tensile
kN

Thread
class

M3

2.7

6

3,500

0.5

900

 

 

 

6

M4

3.7

6

3,300

0.5

800

1.0

2.0

5

9

5.3

8.3

6

6

8

M5

4.5

8

3,000

0.6

700

1.0

1.5

2.0

8

11

13

8.5

11.5

14

6

8

10

M6

5.3

8

2800

0.7

600

1.5

2.0

3.0

16

20

26

13.5

17.5

24

6

8

12

M8

7.3

8

2,500

0.8

400

2.0

3.0

4.0

27

51

65

26

40

45

6

10

12

M10

9.2

10

2,200

1

350

3.0

4.0

64

96

52

70

8

12

M12

10.9

12

2,000

1.5

300

3.0

4.0

5.0

134

161

267

66

87

97

6

10

10

M16

14.8

14

11-1500

(*10-4mm)

3 2.5

(*10-4mm)

200

3.0

8.0

 

94

 

M20

18.6

18

9-1100

(*10-4mm)

4.0-2.7

(*10.4mm)

100

3.0

10.0

 

136

 

* Material Thickness

Please refer to price list for tapping sizes of other threads

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