Rockwell Automation TLY-Series Servo Motor - Manual (Page 21)

TL-Series Servo Motors 21
Publication TL-IN003A-EN-P — June 2007
Remove and Install a Shaft Key
Shaft keys are constructed of carbon steel. Keys for metric mount motors are toleranced for
interference fit (slightly larger than the opening) to be sure of a secure and rigid fit with the mating
connection. Keys for NEMA mount motors are toleranced for a slightly loose (slip) fit.
To remove a shaft key, perform one of the following actions.
• 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 a shaft key, follow these steps.
1. Verify that the replacement key matches the keyway in the shaft and the mating mechanical
connection (for example, a coupling or pulley) before proceeding.
2. Align the front of the key with the front of the motor shaft. This prevents the radiused
end-of-cut at the motor end of the keyway from interfering with correct seating of the key.
3. Support the underside of the shaft diameter with a fixture, and use a controlled press device
to apply a constant force across the top surface to press the key into the shaft.
ATTENTION
Do not strike the shaft, key, couplings, or pulleys with tools during installation or
removal.
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 also may result by applying leverage from the
faceplate to remove devices mounted on the motor shaft.
Apply a constant pressure, with a wheel puller, to the user end of the shaft to
remove from the motor shaft any friction fit or stuck device.
Failure to observe these safety procedures could result in damage to the motor and
its components.
IMPORTANT
Check the motor shaft and surrounding surfaces. Remove any nicks,
burrs, or surface damage. Significant grooving or damage will require
service by Rockwell Automation to provide appropriate seal performance.