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Home-->Technical |
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Torque Figures
- Torque figures for bolts and screws with metric
thread and head dimensions, as in DIN 912, 931,
934 etc.
- The figures MA in this table include:
a)coefficient of friction microns total + 0.14
b)90% of minimum elongation
c)torque figures when assembling fasteners
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- The coefficient of friction of microns total
= 0.14 applies for fasteners without coating (self
colour) when slighty lubricated.
- Additional lubrication of the thread will substantially
alter the coefficient of friction, leading to
uncontrollable pre-load situations.
- Pre-load situations will also be influenced
by the fastening methods and tools used.
- The following figures are guidelines only.
- Figures in NM(Newton Meters)
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Tightening Torques
(For Metric Coarse Thread Bolts and Screws) Based on coefficients
of friction ?total of 0.100
Thread
Diameter |
Property Classes |
| 4.6 |
5.6 |
8.8 |
10.9 |
12.9 |
| M4 |
1.02 |
1.37 |
3.0 |
4.4 |
5 |
| M5 |
2.00 |
2.70 |
5.9 |
8.7 |
10 |
| M6 |
3.50 |
4.60 |
10 |
15 |
18 |
| M8 |
8.40 |
11 |
25 |
36 |
43 |
| M10 |
17 |
22 |
49 |
72 |
84 |
| M12 |
29 |
39 |
85 |
125 |
145 |
| M14 |
46 |
62 |
135 |
200 |
235 |
| M16 |
71 |
95 |
210 |
310 |
365 |
| M18 |
97 |
130 |
300 |
430 |
500 |
| M20 |
138 |
184 |
425 |
610 |
710 |
| M22 |
186 |
250 |
580 |
820 |
960 |
| M24 |
235 |
315 |
730 |
1,050 |
1,220 |
| M27 |
350 |
470 |
1,100 |
1,550 |
1,800 |
| M30 |
475 |
3635 |
1,450 |
2,100 |
2,450 |
| M33 |
645 |
8865 |
1,970 |
2,770 |
3,330 |
| M36 |
830 |
1,111 |
2,530 |
3,560 |
4,280 |
Tightening Torques
(For Metric Fine Thread Bolts and Screws) Based on coefficients
of friction ?total of 0.100
Thread
Diameter |
Tightening Torque MA
max (Nm) |
| Property Classes |
| 8.8 |
10.9 |
12.9 |
| M8 x 1.00 |
22 |
30 |
36 |
| M10 x 1.25 |
42 |
59 |
71 |
| M12 x 1.25 |
76 |
105 |
130 |
| M14 x 1.50 |
120 |
165 |
200 |
| M16 x 1.50 |
180 |
250 |
300 |
| M18 x 1.50 |
260 |
365 |
435 |
| M20 x 1.50 |
360 |
510 |
610 |
| M22 x 1.50 |
480 |
680 |
810 |
| M24 x 2.00 |
610 |
860 |
1,050 |
Conversion Figures
To get NCM from Nm Nm x 100
To get inch pounds from Ncm
Ncm x 0.08851
To get foot pounds from Ncm
Ncm x 0.00737
To get foot pounds from NM
Nm x 0.7376 |
*All information is strictly informative
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Contact
us |
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Company Name: Hengsin Industrial Co.,Ltd.
Contact Person: Martin Wang.
Address: 310-5-#55, Zhanongkou Xincun, Jianggan District,Hangzhou,China 310004
Zip: 310004
Tel:86-571-82760351
Mobile:86-131-75103386
Fax:86-571-86973903
Email:sales@fasteners.cc
Email2:Martinwangke@yahoo.com.cn
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