Motor related questions

[Danjr1]

Two things:

Is the easiest way to put a flat section on a 5mm motor shaft to use a dremel with a grinding attachment?

And

What size grub screw should I use in a pinion on a 5mm shaft?

[geeza]

Re: Motor related questions

The easiest way would be use a milling machine. But your way would work, a file may give you a more consistant flat though. I would use a M4 grub screw maybe, it depends on how much material the pinion has ideally you need 1d (4mm of thread for a M4 screw).

[maddox10]

Re: Motor related questions

5mm shaft, M3 setscrew.

Otherwise you need to file/grind the shaft to much down.

[limpet]

Re: Motor related questions

use some sort of threadlock and check them for tightness whenever possible as well.