Table of Contents
Advertisement
7 Reference information
7.4.1 Bolt and screws
7.4 Bolt, screws, tightening torques
7.4.1 Bolt and screws
General
Before tightening any screw, observe the following:
118
•
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 keys.
•
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
The bolts used on (or provided with) the GWT C9 are of 3 different classes, 8.8,
10.9, and 12.9. Unless indicated otherwise, the screws are by default of class
8.8.
© Copyright 2022 ABB. All rights reserved.
Product manual - GWT C9
3HAA010198-001 Revision: A
Advertisement
Table of Contents
