Disassembly of the M100 and M200 motor is simple and should only take a minute!
1. Loosen the set screw from the shaft collar at the bottom of the motor.
2. Remove shaft collar. If it seems stuck, pull the rotor away from the base to pull the shaft out of the collar. Do not pry the shaft collar.
3. Remove the rotor assembly.
Repeat these steps in the reverse direction to reassemble the motor.