Allen-Bradley 1336 IMPACT - Fastener Torque Specifications; Torque Sequence; Two-Point Mounting; Four-Point Mounting

3–3Disassembly and Access Procedures
Publication 1336 IMPACT-6.2 – March 1998
Torque Sequence
When mounting components to a drive’s heat sink,
component-fastener torque sequences and tolerances are crucial to
component-to-heat sink heat dissipation.
!
ATTENTION: Component can be damaged if
temporary tightening procedure is not performed to
specification.
Two-Point Mounting
The following illustrates temporary and final tightening sequences
for components fastened to a heat sink using two screws. Temporary
torque is 1/3 (33%) of final torque. The numeric illustration labels
are for your assistance. Drive components do not carry these labels.
Figure 3.1
Two-Point Mounting
2
1
AB0016A
1
2
2
1
Temporary Tighten
Final Tighten
Two-Point Mounting
Four-Point Mounting
The following illustrates temporary and final tightening sequences
for components fastened to a heat sink using four screws. Temporary
torque is 1/3 (33%) of final torque. The numeric illustration labels
are for your assistance. Drive components do not carry these labels.
Fastener Torque
Specifications