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7 Reference information
7.4 Screw joints
Continued
Oil-lubricated screws with slotted or cross-recess head screws
The following table specifies the recommended standard tightening torque for
oil-lubricated screws with slotted or cross-recess head screws.
Dimension
M2.5
M3
M4
M5
M6
Oil-lubricated screws with allen head screws
The following table specifies the recommended standard tightening torque for
oil-lubricated screws with allen head screws.
Dimension
M5
M6
M8
M10
M12
M16
M20
M24
Lubricated screws (Molycote, Gleitmo or equivalent) with allen head screws
The following table specifies the recommended standard tightening torque for
screws lubricated with Molycote 1000, Gleitmo 603 or equivalent with allen head
screws.
Dimension
M8
M10
M12
M16
M20
Continues on next page
348
•
Always tighten the joint by hand, and never use pneumatic tools.
•
Use the correct tightening technique, that is do not jerk. Tighten the screw
in a slow, flowing motion.
•
Maximum allowed total deviation from the specified value is 10%!
Tightening torque (Nm)
Class 4.8, oil-lubricated
0.25
0.5
1.2
2.5
5.0
Tightening torque (Nm)
Class 8.8, oil-lubricated
6
10
24
47
82
200
400
680
Tightening torque (Nm)
Class 10.9, lubricated
28
55
96
235
460
© Copyright 2013 ABB. All rights reserved.
Tightening torque (Nm)
Class 10.9, oil-lubric-
ated
-
-
34
67
115
290
560
960
Tightening torque (Nm)
i
Class 12.9, lubricated
35
70
120
280
550
3HAC039838-001 Revision: C
Tightening torque (Nm)
Class 12.9, oil-lubric-
ated
-
-
40
80
140
340
670
1150
i
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