Rockwell Automation 20B PowerFlex 700 Drive Components Replacement - Frame 8 - Manual (Page 20)

20 Rockwell Automation Publication 20B-IN024C-EN-P - June 2012
Chapter 1 Component Diagrams and Torque Specifications
Fastener Torque
Specifications Torque Sequence
The following illustrates initial and final tightening sequences for components
fastened to a heatsink using two, four, and six screws. Initial torque is 1/3 (33%)
of final torque, except six-point mountings, which require 0.7 N•m (6 lb•in.) The
numeric illustration labels are for your assistance. Drive components do not carry
these labels.
Figure 6 - Various-point Mounting
ATTENTION:
When mounting components to a drive’s heatsink,
component fastener torque sequences and tolerances are crucial
to component-to-heatsink heat dissipation.
Components can be damaged if initial tightening procedure is not
performed to specification.
Initial
Torque Sequence
Final
Torque Sequence
Two-Point Mounting
Start End End Start
1 2 1 2
Initial
Torque Sequence
Final
Torque Sequence
Four-Point Mounting
End
Start
Start
End
1 2 4 3
3 4 2 1
Note: Do not exceed 0.7 N•m (6 lb•in) on initial torque.
Initial Torque Sequence
Six-Point Mounting
Start
End
Final Torque Sequence
Start
End
6 2
3 1
4
5
6 2
3 1
4
5