Originally Posted by Skiddins
Ok, can some of you explain exactly what the cavity cut achieves, and just as importantly, how it achieves it?
Thanks
Skiddins
When you remove material from the center of the brush, (cavity, slot, etc) it increases the pressure being applied to the leading and trailing edges of the brush, improving commutation. This will help reduce/eliminate heat and damage to the comm and brushes due to arcing. The less comm/brush damage a motor sustains during a run, the less performance loss you will see throughout the run. You may also see a gain in RPM, due to the fact that the full width of the brush is in contact with the comm and that there is now less brush drag on the comm as well.