Jerry ) writes:
On Sep 10, 12:06 pm, "Michael A. Terrell"
wrote:

BTW, have you seen the small DC powered clone at Harbor Freight? It
runs on 12 VDC, and comes with an AC adapter. I was thinking about
using one (or more, with different sized drills) with a homebrew CNC
machine to drill PC boards.


I have one of those HF pseudo-dremels. Not very torque-y at all. Bogs
down very easily. A very light touch is required.

But that's the point, those things have really high speed to do the
work, and you shouldn't be using much pressure.

Try sawing through a bolt. You'd have to use the hacksaw and lots
of pressure. Put a cutoff wheel in the "rotary tool", and you barely
need to apply any pressure. The first time I tried a cutoff wheel
in one of those things was the day I realized how wonderful they
were.

Now, your cheap one may have other problems. But a light touch
is what's required with "rotary tools" anyway.

Michael