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Your Location: Home > Products > Tap Holders > Torque Reference Values for Tapping
Torque Reference Values for Tapping
Torque |
Thread Type |
| Nm |
Ft. lbs |
M |
UNC |
UNF |
G (Whw.), BSP |
NPT, NPTF
(with cylindrical boring) |
Rc (BSPT) |
| 0.3 |
0.22 |
M2 |
No.2 |
No.2 |
|
|
|
| 0.4 |
0.30 |
M2.5 |
|
No.3 |
|
|
|
| 0.5 |
0.37 |
|
No.3 |
No.4 |
|
|
|
| 0.6 |
0.44 |
M3 |
|
|
|
|
|
| 0.8 |
0.59 |
|
No.4 |
No.5 |
|
|
|
| 1.0 |
0.74 |
M3.5 |
No.5 |
No.6 |
|
|
|
| 1.2 |
0.89 |
M4.5 |
No.6 |
No.8 |
|
|
|
| 1.6 |
1.18 |
M4 |
No.8 |
|
|
|
|
| 2.0 |
1.48 |
|
|
No.10 |
|
|
|
| 2.5 |
1.85 |
M5 |
|
No.12 |
|
|
|
| 3 |
2.21 |
|
No.10 |
1/4 |
|
|
|
| 4 |
2.95 |
|
No.12 |
|
|
|
|
| 5 |
3.69 |
M6 |
|
5/16 |
|
|
|
| 6 |
4.43 |
M7 |
1/4 |
3/8 |
G 1/8 |
|
|
| 8 |
5.90 |
|
|
|
|
|
|
| 10 |
7.38 |
M8 |
5/16 |
7/16 |
|
|
|
| 12 |
8.86 |
M9 |
|
1/2 |
|
|
|
| 16 |
11.81 |
|
3/8 |
|
|
1/16 |
Rc 1/16 |
| 18 |
13.28 |
M10 |
|
9/16 |
G 1/4 |
|
|
| 20 |
14.76 |
|
|
5/8 |
|
|
|
| 22 |
16.24 |
|
7/16 |
|
G 3/8 |
|
|
| 25 |
18.45 |
M12 |
|
|
|
1/8 |
Rc 1/8 |
| 28 |
20.66 |
|
|
|
|
|
|
| 32 |
23.62 |
|
1/2 |
3/4 |
|
|
|
| 36 |
26.57 |
|
|
|
|
|
|
| 40 |
29.52 |
|
9/16 |
|
|
|
|
| 45 |
33.21 |
M14 |
|
7/8 |
|
|
|
| 50 |
36.90 |
M16 |
5/8 |
|
G 1/2 |
|
|
| 56 |
41.33 |
|
|
|
G 5/8 |
1/4 |
Rc 1/4 |
| 63 |
46.49 |
|
|
|
|
|
|
| 70 |
51.66 |
|
3/4 |
1" |
G 3/4 |
|
|
| 80 |
59.04 |
M18 |
|
1 1/8 |
G 7/8 |
|
|
| 90 |
66.42 |
M20 |
|
1 1/4 |
|
3/8 |
Rc 3/8 |
| 100 |
73.80 |
M22 |
7/8 |
1 3/8 |
|
|
|
| 110 |
81.18 |
|
|
1 1/2 |
|
|
|
| 125 |
92.25 |
|
|
|
|
|
|
| 140 |
103.32 |
M24 |
1" |
|
G 1" |
|
|
| 160 |
118.08 |
M27 |
|
|
G 1 1/8 |
1/2 |
Rc 1/2 |
| 180 |
132.84 |
|
|
|
G 1 1/4 |
|
|
| 200 |
147.60 |
|
|
|
G 1 3/8 |
3/4 |
Rc 3/4 |
| 220 |
162.36 |
M30 |
1 1/8 |
|
G 1 1/2 |
|
|
| 240 |
177.12 |
M33 |
1 1/4 |
|
G 1 3/4 |
|
|
| 260 |
191.88 |
|
|
|
G 2" |
|
|
| 280 |
206.64 |
M36 |
|
|
|
|
|
| 300 |
221.40 |
|
|
|
G 2 1/4 |
|
|
| 320 |
236.16 |
M39 |
|
|
|
|
|
| 340 |
250.92 |
|
1 3/8 |
|
G 2 1/2 |
1" |
Rc 1" |
| 360 |
265.68 |
|
1 1/2 |
|
G 2 3/4 |
|
|
| 400 |
295.20 |
M42 |
|
|
G 3" |
|
|
| 420 |
309.96 |
M45 |
|
|
G 3 1/4 |
|
|
| 450 |
332.10 |
|
|
|
G 3 1/2 |
1 1/4 |
Rc 1 1/4 |
| 480 |
354.24 |
|
|
|
G 3 3/4 |
|
|
| 500 |
369.00 |
|
|
|
G 4" |
|
|
| 560 |
413.28 |
M48 |
|
|
|
1 1/2 |
Rc 1 1/2 |
| 630 |
464.94 |
M52 |
1 3/4 |
|
|
|
|
| 710 |
523.98 |
M56 |
|
|
|
2" |
Rc 2" |
| 800 |
590.40 |
M60 |
|
|
|
|
|
| 900 |
664.20 |
M64 |
|
|
|
|
|
| 1000 |
738.00 |
M68 |
2" |
|
|
|
|
| 1100 |
811.80 |
|
2 1/4 |
|
|
|
|
| 1250 |
922.50 |
|
|
|
|
|
|
| 1400 |
1033.20 |
|
2 1/2 |
|
|
2 1/2 |
Rc 2 1/2 |
| 2000 |
1476.00 |
|
2 3/4 |
|
|
3" |
Rc 3" |
| 2200 |
1623.60 |
|
|
|
|
|
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The values listed above are only reference values and were calculated for a ground thread single pass tap being used in steel of an appr. 600 - 800 N/mm2 tensile strength.
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