Originally Posted by imprsme
NOT TRUE AT ALL!!!
If the lathe is cutting at and angle that is deeper at the inside vs the outside. The sharpie would be gone but the Comm. would be tapered.
If you cut it deep enough all of the Sharpie will be gone anyway...
I don't think it really matters if you have a little bit of taper in the comm. I know my lathe cuts with a small ammount. You can see if if you look at the brushes after like 30 seconds of run. After that its unnoticable. Maybe it works better that way, cause you have more surface contact.
My motors are always fast.