ABB IRB 4600 - 20/2.50, Product Manual

Page: 338 / 374

• 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% !
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.
Tightening torque (Nm)
Class 4.8, oil-lubricated Dimension
0.25 M2.5
0.5 M3
1.2 M4
2.5 M5
5.0 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.
Tightening torque (Nm)
Class 12.9, oil-lubric-
ated Tightening torque (Nm)
Class 10.9, oil-lubric-
ated Tightening torque (Nm)
Class 8.8, oil-lubricated Dimension
- - 6 M5
- - 10 M6
40 34 24 M8
80 67 47 M10
140 115 82 M12
340 290 200 M16
670 560 400 M20
1150 960 680 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.
Tightening torque (Nm)
Class 12.9, lubricated
i
Tightening torque (Nm)
Class 10.9, lubricated
i
Dimension
35 28 M8
70 55 M10
120 96 M12
280 235 M16
550 460 M20
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338 3HAC033453-001 Revision: H
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8 Reference information
8.4 Screw joints
Continued