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Threaded commutators

Threaded commutators
Vol. 19 #1, Feb. 1992

 

 

I've seen a fair number of DC drive motors with threaded (a fine sort of grooving) commutators. 

 

Threading can be caused in many ways, but, chances are, the brush current density is too low.

 

See also

Brush wear forecasting 

DC drive failure 

Drive motor start up

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Threaded commutators