Who's of you make flat spot on motor shaft??

[Serum]

I'll shoot a pic of my flat spot later this day..

I use a dremel and a grinding stone.. Works like a charm. I try to make them a bit hollow..

[Finnster]

I make a flat spot for most of the shaft, but I leave the end bigger, just in case the setscrew gets loose. That way the pinion can't go flying off

[zeropointbug]

Originally Posted by Finnster

I make a flat spot for most of the shaft, but I leave the end bigger, just in case the setscrew gets loose. That way the pinion can't go flying off

That's a pretty darn good idea Finnster! I know I recently had a pinion fly off on me... didn't wait long enough for lock tight to harden and/or I didn't tighten th set screw enough.

Originally Posted by Finnster

I make a flat spot for most of the shaft, but I leave the end bigger, just in case the setscrew gets loose. That way the pinion can't go flying off

Yeah, that is a very good idea!

[Patrick]

Originally Posted by Finnster

I make a flat spot for most of the shaft, but I leave the end bigger, just in case the setscrew gets loose. That way the pinion can't go flying off

I use a grinding stone on the dremel and leave the last mm or 2 as well so the pinions can't come off. The pinion came loose once or twice with my fiegao, but I didn't loose the pinion because of the end being bigger.
With my neu I think I may have done the flat spot a bit better (still with the lip at the end though), because I haven't had a loose pinion in the last 6 months I've had that motor, I don't use loctite on the set screws.
I've put pinions on the shaft with the set screw facing both ways and the lip at the end hasn't gotten in the way.