Re: [CAD_CAM_EDM_DRO] re: small variable speed motors

Elliot Burke wrote:

>
> From: "Elliot Burke" <elliot@...>
>
> Am polishing glass. This is done on a cast iron grinder rotating from
> 40-400 rpm typically for grinding, then a pitch lap in similar speed range.
> Some people have CNC machines that can do this sort of thing, but for
> prototype work it is mostly still done in a way familiar to amateur
> telescope makers.
>
> I think I'll use a VSR drill. After my first cheap one burns out, I'll shop
> for one with quieter gears. There is a screw inside the chuck which
> probably is involved with removing the chuck, but the darn thing is too
> tight to get off. With the chuck off the pulley could get closer to the
> bearings, and put less moment into the output shaft. I suspect these drill
> motors will have reduced life when used with pulley side loads.
>

Elliot;

Those screws in the center of the chuck are usually left hand thread.
Once
thats is out you will still have to unscrew the chuck.

Bill