DCE80-100E
Technical Handbook
General
10
P.
Group 00
TDCE01
04GB
Tightening torques
The tightening torques are applicable to steel bolts and nuts tight-
ened with a torque wrench under the following conditions:
The values specified in Table 1 are applicable to nut-and-bolt
joints, but can also be used for bolts fitted into tapped holes. How-
ever, in the latter case, the preloading force will be somewhat
lower, depending on its depth of engagement.
When tightening by machine, the torque specified in Table 1
should be reduced by approx. 5%, due to the increased scatter
and to prevent the bolt from being tightened beyond its yield
point.
Surface treatment
Condition
Lubriation
Bolt
Nut
1
untreated
untreated
oiled
2
bright galvanised
bright galvanised
bright galvanised
untreated
bright galvanised
bright galvanised
dry or oiled
3
hot-dip galvanised bright galvanised
dry or oiled
Quality
8,8
10,9
12,9
Tightening torque, Nm
Condition
Thread
M fin
1
2
3
1
1
M8×1
M10×1,25
M12×1,25
M16×1,5
M18×1,5
27
54
96
230
330
24
48
85
205
294
30
61
108
260
373
39
76
135
323
466
46
91
162
388
559
M20×1,5
M24×2
M30×2
M36×3
460
786
2660
1560
409
700
1388
2367
520
888
1763
3005
647
1100
2200
3730
777
1330
2640
4480
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