22
Rockwell Automation Publication 750-TG101A-EN-P - June 2022
Chapter 1 Before You Begin Tests, Maintenance, or Repairs
Hardware Installation
Diagrams
The disassembly illustrations throughout this manual contain diagrams (as
shown here) that identify the following: sequence number (if necessary), type
of fastener, fastener size, tool type and size, and final assembly torque.
Fastener Torque Sequences
These figures illustrate the initial and final tightening sequences for
components that are fastened to a heatsink by 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) initial torque. The numeric illustration labels are for your assistance.
Drive components do not contain these labels.
Figure 7 - Two-point Mounting
Fastener Type
Flat-head screw
Hexagonal bolt
Hexagonal nut or standoff
Hexagonal screw
Torx screw
Slotted Torx screw
Sequence
Number
1
M4 x 10 mm
T20 or F - 6.4 mm (0.25 in.)
4.8 N
•
m (42 lb
•
in)
Tool Type and Size
F
Flat-nose screwdriver
T
xx
Torx screwdriver/bit and size
nn
mm Hexagonal socket wrench
Final Assembly Torque
Fastener Size
ATTENTION:
When mounting components to a drive heatsink, component
fastener torque sequences and tolerances are crucial to component-to-heatsink
heat dissipation.
Components can be damaged if the initial tightening procedure is not performed
to specification.
1
2
Initial Sequence
1
2
1
2
Final Sequence
