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  #1  
Old 05-13-2011, 02:23 AM
HOracerone HOracerone is offline
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Default Motor Brushes?!?

Hey guys, what do you suggest for breaking in new motor brushes on magnet cars ? Or does it really make a difference if you don't break them in?
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  #2  
Old 05-13-2011, 05:09 AM
slotking slotking is offline
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I but in new brushes in won races
I have also broke them in and won races

I have tested it on the DYNO and it all seems to depend on the car
ie.. it often seems to help the SG+
but with barrel cars, its up in the air
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  #3  
Old 05-13-2011, 06:22 AM
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RichD RichD is offline
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For a particular motor there is no way to compare the performance that you get if you run it straight out of the package versus what you get if you break the motor in on the bench. Before the brushes are fully seated the contact area is very small so you are applying more pressure per square inch to the commutator . I used to recondition armatures for a number of people and it was easy to spot the ones that did not get a bench break-in. There was discoloration to the commutator that was not removed when it was cut and there was also damage to the edge of the slots. When the motor is not broken in properly the crystal structure of the copper is altered to something that is much harder and does not conduct electricity as well. When I first started truing armatures I was suprised at how fast carbide cutters would wear out. I had to switch to a diamond cutter.
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  #4  
Old 05-13-2011, 09:29 AM
slotking slotking is offline
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Sorry
I normally run the Slottech bigfoot brush system
they start with a bigger foot print
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