jakes7

The comms on a couple of my motors are chipping, what causes this?
Exsesive heat? Not cut often enough? to light/heavy of brushes?

Kraig

iTrader: (81)

As the com gets smaller you might run into a problem with them chipping. I am going to guess that it is by the slots seperating the segments, if so you might as well as get a new one.

MarkA

iTrader: (21)

Yeah, it’s probably just age but if the comms are relatively new and are chipping while you are cutting them, it could also mean your lathe bit is too dull.