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RC Glossary


New to the RC Hobbies? What does buggy, bulkhead, nitro mean in radio control car hobbies? Check out the glossary for remote control cars below.

Motor Shims --

Super thin 'washers' used to center a motor's armature in the can's magnetic field. These shims are placed between the bearings and armature of an electric motor to ensure the armature spins freely. To properly center an armature using motor shims, first spin the armature by hand without the brushes or springs installed - this centers it inside the can. Then pull on the armature, if there is more than just a 'tick' of play, a shim, or shims, will need to be added to that side. Disassemble the motor and add the estimated number of shims. Reassemble the motor and repeat, but this time pull on the armature, adding any shims if necessary. The goal is to achieve a 'tick' of play in each direction. Always use at least 1 motor shim on each side. Shimming a motor may not offer insane power gains, but every little bit helps, especially with stock racing.
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