Rockwell Automation TL-Series Servo Motor - Manual (Page 20)

20 TL-Series Servo Motor Installation Instructions
Publication TL-IN001C-EN-P — March 2005
Removing and Installing a Shaft Key
TL shaft keys are constructed of carbon steel. Keys for metric mount motors are
toleranced for interference fit (slightly larger than the opening) to ensure a secure
and rigid fit for the mating connection. Keys for NEMA mount motors are
toleranced for a slightly loose (slip) fit.
To remove an interference fit key:
• Lift the key by grasping it with a plier or similar tool.
• Lever the key with a flat blade screwdriver inserted between the key and the slot.
To install an interference fit key:
• Verify the replacement key matches the keyway in the shaft and the mating
mechanical connection (e.g., coupling or pulley) before proceeding.
• Support the underside of the shaft diameter with a fixture (Figure 3), and use a
controlled press device to apply a constant force across the top surface to press
the key into the shaft.
Figure 3
Key Alignment and Shaft Support
!
ATTENTION
Damage may occur to the motor bearings and the feedback
device if sharp impact to the shaft is applied during installation
of couplings and pulleys, or a shaft key. Damage to the feedback
device may result by applying leverage from the motor
mounting face to remove devices mounted on the motor shaft.
Failure to observe these safety procedures could result in
damage to the motor and its components.
Shaft
Support for shaft
and/or motor