ABB FlexPLP IRPLP 220, Product Manual

Page: 133 / 146

9.3 Bolt, screws, tightening torques
Bolt and screws
Before tightening any screw or bolt, observe the following:
• Determine whether a standard tightening torque or special torque is to be
applied. The standard torques are specified in the following tables. Any
special torques are specified in the repair, maintenance or installation
procedure descriptions. Any special torque specified overrides the standard
torque! Use the correct tightening torque for each type of screw joint.
• Only use correctly calibrated torque wrench.
• Always tighten the joint by hand, and never use pneumatic tools.Use the
correct tightening technique, tighten the screw in a slow, flowing
motion.Maximum allowed total deviation from the specified value is 10%!
Note
Unless indicated otherwise, the bolts used on (or provided with) the FlexPLP are
of class 8.8.
Note
Unless indicated otherwise, all bolts must be free of oil or grease and tightened
with a mild thread-locker such as Loctite 243.
Standard tightening torques
The following table specifies the recommended standard tightening torques for
hex screws and socket head hex screws:
M12 M10 M8 M6 M5 Screw thread size
79 Nm 46 Nm 23 Nm 9.5 Nm 5.5 Nm Tightening torque
CLASS 8.8
116 Nm 67 Nm 34 Nm 14 Nm 8.1 Nm Tightening torque
CLASS 10.9
136 Nm 79 Nm 40 Nm 16.4 Nm 9.5 Nm Tightening torque
CLASS 12.9
The following table specifies the recommended standard tightening torque for
water and air connectors when one or both connectors are made of brass:
Tightening torque
Nm - Maximum Tightening torque
Nm - Minimal Tightening torque
Nm - Nominal Dimension (unit: inch)
15 Nm 8 Nm 12 Nm 1/8
20 Nm 10 Nm 15 Nm 1/4
25 Nm 15 Nm 20 Nm 3/8
50 Nm 30 Nm 40 Nm 1/2
90 Nm 55 Nm 70 Nm 3/4
Product manual - FlexPLP IRPLP 220 133
3HAW050041018-001 Revision: C
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9 Reference information
9.3 Bolt, screws, tightening torques