dale martin wrote:
On Dec 4, 9:53 am, mkr5000 wrote:
I've never used one before but what's the word on the rotozip tool?

I can see how it would be nice for drywall etc but I'm looking for a
better way to cut circles in 1/2" or 3/4" plywood or mdf board.
(rather than a router).

Are these working looking at? -- is there a circle jig that works
with it?

Certainly you're moving less material with it than a router which may
be a good thing.

As has been mentioned the rotozip and/or dremel don't work real well
for wood- with the possible exception of routing shallow cavities for
inlays. You might be better off looking at a laminate trimmer (mini-
router) and building a trammel for it or use it with template guides
to cut circles. I have a Ridgid laminate trimmer for this purpose that
I usually use with a 1/4" spiral bit. Maybe three passes around,
adjusting depth of cut to go through 1/2" mdf. Major clouds of dust!
I try to catch most in dust collector. Hope this helps.

Excellent idea! I have the $25 Harbor Freight model that I used for some
laminate trimming. Worked swell for that.

http://www.harborfreight.com/cpi/cta...emnumber=44914

If cutting large holes in thick wood, I'd expect one to have to replace the
bit a few times.

Then, too, there's the jigsaw technique for cutting the interior of a wood
sheet... The OP didn't say whether he wanted a circulare hole or a circular
plate. If the latter, there's a technique for so doing using a table saw.