On 2012-04-19, Rebel1 <
Reb...@optonline.net> wrote:
> I'm installing a peephole viewer that requires a 1" hole in a 1.75"
> door. It's item U9896 here:
First of all, why the Hell is it a one inch hole? It's a peephole,
not a supermax camera. I'd look for a smaller OD optic.
>
http://www.milwaukeetool.com/accessories/drilling-accessories/metal-drilling/step-drill-bits
> place charges $48 to BUY the bit, and doesn't even have a 1/2" drill for
> rent.
You're gonna need a step drill, no doubt about it. OTOH, 1/16" thk is
pretty hefty if it's steel sheet clad. If alum, no problem. Yer also
gonna need a 1/2" drill motor. A 3/8" chuck drill motor is jes not
gonna have the power.
Fer gawds sake, stay away from a hole saw unless you have a drill
press or magnetic drill press. Even with a pilot drill, the chances
of breaking or at least spraining yer wrist is HUGE. I'm a machinist
and you couldn't get me to use a hole saw with a hand drill motor,
even at gunpoint.
Geez, donchya got some friends or neighbors? Someone is bound to have
a 1/2" drill motor. I've got 3! I'm remote as Hell, yet still have 3
rental places within 20 mi. Beg, borrow, or steal the 1/2" motor and
mail order a bit.
If you can find a 7/8" OD peephole, you can use a 3/8" chuck drill
motor and pay a reasonable price. Unibit is a good product:
http://tinyurl.com/7m23xbd
nb
--
vi --the heart of evil!