[Joe Johnson]

I strongly urge folks not to mess with the steel in the can of the Chiaphua (CIM) motor.


The metal thickness of the motor housing is part of the magnetic path of the motor. There are times when we actually ADD material around a motor to increase the torque of a motor (note the flux yoke on the Fisher Price motors). For some PSD motors, we can get about 15% more torque by simply putting a thick sleeve of steel around the outside of the motor can.

Reducing the motor can thickness on the CIM motor will almost certainly reduce the torque of the motor.

This is one of those happy cases where it is both illegal and bad engineering to remove metal.

Joe J.

P.S. as a rule of thumb, if a large paper clip can be picked up by using the outside of the motor can, it is likely that it could benefit from an external flux yoke, the stronger it sticks the more likely a benefit can be had.