User Manual

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 larg er 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, pe rform one of the following act ions.
• Lift the key by grasping it with a plier or simi lar t ool.
• Lever the key with a flat-blad e screwdriver inser t ed between the key and the slot.
To inst all 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 couplin g 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 correc t seating of the key.
3. Suppor t the u nderside of the shaft diameter with a fixture, and use a controlled press device
to apply a cons tant force across the top surface to press the key into the shaft.
ATTENTION
Do not str ike the shaft, key, couplings, or pul leys with tools dur ing insta ll ation or
removal.
Damage may occur to the motor bearings and the feedback device if sharp impact to
the shaft is applied during installat ion 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 shaf t .
Apply a constant pressur e, with a wheel puller, to the user end of the shaft to
remove from the motor shaft any friction fit or stuck device.
Failur e t o observe these safety proce dur es could result in damage to the motor and
its component s.
IMPORTANT
Check the motor shaft and surr ounding surfaces. Remove any nicks,
burrs, or surface dam age. Significa nt grooving or damage will re qu ire
service by Rockwell Automation to provide appropriate seal performance.