Drill Bit Size

Does anyone know the appropriate drill bit size for a drive shaft. We want to make free spinning metal inserts, since the plastic ones fall out.


You could try using bits of rubber bands or anti-slip mat as a shim to lock the plastic inserts in. I’ve never done this myself, but you could try it.

Does anyone know what the right size is for standoffs for a GER style transmission.

A standoff is 1/4" across the flats, but the bit size for the entire diameter of the standoff is 5/16".