| Thread size |
Steel
|
Stainless Steel
|
| Metric |
Peripheral speed 7–10 m/min.
|
Peripheral speed 3–5 m/min. |
|
M3X0.5
|
800 Rpm.
|
400 Rpm.
|
|
M4X0.7
|
700 Rpm.
|
350 Rpm.
|
|
M5X0.8
|
600 Rpm.
|
300 Rpm.
|
|
M6X1.0
|
500 Rpm.
|
250 Rpm.
|
|
M8X1.25
|
400 Rpm.
|
200 Rpm.
|
|
M10X1.5
|
320 Rpm.
|
160 Rpm.
|
|
M12X1.75
|
270 Rpm.
|
130 Rpm.
|
|
M14X2.0
|
230 Rpm.
|
120 Rpm.
|
|
M16X2.0
|
200 Rpm.
|
100 Rpm.
|
|
M18X2.5
|
180 Rpm.
|
100 Rpm.
|
|
M20X2.5
|
160 Rpm.
|
90 Rpm.
|
|
BSP
|
||
|
1/8BSP
|
320 Rpm.
|
160 Rpm.
|
|
1/4 BSP
|
270 Rpm.
|
130 Rpm.
|
|
3/8 BSP
|
200 Rpm.
|
100 Rpm.
|
|
1/2 BSP
|
160 Rpm.
|
90 Rpm.
|
|
3/4 BSP
|
140 Rpm.
|
80 Rpm.
|
|
1/1 BSP
|
120 Rpm.
|
60 Rpm.
|
|
UNC
|
||
|
N°5 UNC (40)
|
800 Rpm.
|
400 Rpm.
|
|
N°6 UNC (32)
|
800 Rpm.
|
400 Rpm.
|
|
N°8 UNC (32)
|
700 Rpm.
|
350 Rpm.
|
|
N°10 UNC (24)
|
700 Rpm.
|
350 Rpm.
|
|
N°12 UNC (24)
|
600 Rpm.
|
300 Rpm.
|
|
1/4 UNC (20)
|
500 Rpm.
|
250 Rpm.
|
|
5/16 UNC (18)
|
400 Rpm.
|
200 Rpm.
|
|
3/8 UNC (16)
|
350 Rpm.
|
175 Rpm.
|
|
7/16 UNC (14)
|
320 Rpm.
|
160 Rpm.
|
|
1/2 UNC (13)
|
270 Rpm.
|
130 Rpm.
|
|
9/16 UNC (12)
|
230 Rpm.
|
120 Rpm.
|
|
5/8 UNC (11)
|
200 Rpm.
|
100 Rpm.
|
|
3/4 UNC (10)
|
180 Rpm.
|
100 Rpm.
|
|
Metric Fine
|
||
|
M6X0.75
|
500 Rpm.
|
250 Rpm.
|
|
M6X0.5
|
500 Rpm.
|
250 Rpm.
|
|
M8X1.0
|
400 Rpm.
|
200 Rpm.
|
|
M8X0.75
|
400 Rpm.
|
200 Rpm.
|
|
M10X1.25
|
320 Rpm.
|
160 Rpm.
|
|
M10X1.0
|
320 Rpm.
|
160 Rpm.
|
|
M12X1.5
|
270 Rpm.
|
130 Rpm.
|
|
M12X1.0
|
270 Rpm.
|
130 Rpm.
|
|
M16X1.5
|
200 Rpm.
|
100 Rpm.
|
|
M16X1.0
|
200 Rpm.
|
100 Rpm.
|
|
M18X1.5
|
180 Rpm.
|
100 Rpm.
|
|
UNF
|
||
|
N°5 UNF (44)
|
800 Rpm.
|
400 Rpm.
|
|
N°6 UNF (40)
|
800 Rpm.
|
400 Rpm.
|
|
N°8 UNF (36)
|
700 Rpm.
|
350 Rpm.
|
|
N°10 UNF (32)
|
700 Rpm.
|
350 Rpm.
|
|
N°12 UNF (28)
|
600 Rpm.
|
300 Rpm.
|
|
1/4 UNF (28)
|
500 Rpm.
|
250 Rpm.
|
|
5/16 UNF (24)
|
400 Rpm.
|
200 Rpm.
|
|
3/8 UNF (24)
|
350 Rpm.
|
175 Rpm.
|
|
7/16 UNF (20)
|
320 Rpm.
|
160 Rpm.
|
|
1/2 UNF (20)
|
270 Rpm.
|
130 Rpm.
|
|
9/16 UNF (18)
|
230 Rpm.
|
120 Rpm.
|
|
5/8 UNF (18)
|
200 Rpm.
|
100 Rpm.
|
|
3/4 UNF (16)
|
180 Rpm.
|
100 Rpm.
|