brushes question

[zim35]

I've looked around and cant find an answer so i figured id start a thread. What is the diffrence between slotted and full brushes? And which is better suited for a crawler?

[EddieO]

Slotted brushes mess with powerband......you can use them as a tuning aid for your motors....some claim it increases RPM, others torque.....I've found that every brush and motor can react different to a brush cut....its all about testing.

Full face is what I use on all my motors......I've messed with brush cuts to a lot of success, just customers are not able to replace easily, so I don't use them on production motors.

Later EddieO

[AreCee]

Originally Posted by zim35

I've looked around and cant find an answer so i figured id start a thread. What is the diffrence between slotted and full brushes? And which is better suited for a crawler?

Slotted was believed to give higher rpm due to less friction and the cavity was supposed to enhance the electric field.

Full brush would give more torque and a little lower rpm, an advantage in crawling. The serrated brush is a full design but the serrations aid in quickening the break in.