On 2/10/2011 9:06 PM, Philip Pemberton wrote:
> (
>
> Problem 2: I don't have a hole-saw suitable for PVC (actually, I don't
> have a hole-saw at all: the one in the toolbox has a broken setscrew so
> the drill bit won't pass any motion onto the saw-blade).
>   =20
The hole saw shank should be chucked in the drill, not the drill itself,=20
but to use the drill, grind a flat on the drill for the set screw to=20
clamp on.
>
> The Dremel won't work either -- the router bit gets clogged with bits of
> PVC very, VERY quickly and just plain stops cutting. I suspect my PCB
> router bit isn't geared up for uPVC, or the Dremel is moving too fast
> and melting the plastic (not surprising).
>   =20
Wrong bit, one I suggested has about 1.5" cutting length, the flutes=20
(grooves) are sharpened, and the spiral ejects chips. Try lower speed,=20
maybe using 1/4" electric drill. Speed will melt plastic, and make a mess.
> Short of "buy a new holesaw" (apparently *not* stocked by the local
> B&Q), does anyone have any ideas how I might be able to cut these holes?
>   =20
Borrow, or maybe even pay someone to make the hole. With right tools,=20
it's a 10 minute job. Otherwise could be hours and not a neat job.
> Thanks,
>   =20
--=20
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