Rockwell Automation HPK-Series Asynchronous Servo Motor - Manual (Page 32)

32 HPK-Series Asynchronous Servo Motors
Publication HPK-IN001C-EN-P - June 2010
Shaft Key Removal and Installation
Shaft keys are dimensioned for an interference fit, slightly larger than the opening. An
interference fit provides a secure and rigid mating connection.
To Remove a Shaft Key
Lift the key by grasping it with a plier or similar tool, or lever the key with a flat-blade screwdriver
inserted between the key and the slot.
To Install a Shaft Key
1. Verify the replacement key matches the keyway in the shaft and the mating mechanical
connection (for example, a coupling or pulley) before proceeding.
2. Support the motor and shaft to prevent movement.
3. Align the front of the key with the front of the shaft. This prevents the radiused
end-of-cut at the motor end of the keyway from interfering with seating of the key.
Shaft Key Alignment
4. Apply a constant force across the exposed surface of the key with a controlled press
device (for example, a screw clamp) to push the key into the shaft.
5. Visually inspect the motor and the key to verify the key is fully seated and aligned.
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.
Key Alignment
Radiused Cut for Keyway
Key
Shaft