ABB IRB 6650 - 125/3.2 - Page 222

2 Reference information
2.1.2 Screw joints
20 A 3HAC 16245-1
Tightening torque Below are tables specifying the torque values for different screw joint types:
Screws with slot-
ted or cross
recess head
Screws with
hexagon socket
head, “dry”
Screws with
hexagon socket
head, lubricated
Dimension
Tightening torque (Nm)
Class 4.8 "dry"
M2.5 0.25
M3 0.5
M4 1.2
M5 2.5
M6 5.0
Dimension
Tightening
torque (Nm)
Class 8.8 "dry"
Tightening
torque (Nm)
Class 10.9 "dry"
Tightening
torque (Nm)
Class 12.9 "dry"
M5 6 - -
M6 10 - -
M8 24 34 40
M10 47 67 80
M12 82 115 140
M16 200 290 340
Dimension
Tightening torque (Nm)
Class 10.9
Tightening torque (Nm)
Class 12.9
M8 28 34
M10 55 66
M12 96 115
M16 235 280