Howdy,
On Tue, 17 Jun 2008, Randall wrote:
> I'm working on plumbing (and wiring) a new air compressor for my shop.
> Turns out the 3/4" air line needs to run through some decorative cinder
> block.
>
> Any suggestions for how to cut an approximately 1.25" diameter hole
> through the block, with the least risk of breaking the whole thing in
> half ?
>
> I see HF has spade-type masonry bits to 1", with turned down shanks; but
> I'm not sure how to enlarge the resulting hole.
>
> Any suggestions ? I've got an ordinary 1/2" drill motor; really don't
> want to have to buy a hammer-drill for just this one project. Also an
> air chisel, but I'm worried breaking the block with it.
Rent a masonry drill & appropriate bit?
Or buy this:
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=41983
They also have an SDS bit kit that has a 1" bit. Biggest McMaster sells
is a 1+1/8" bit... That's not big enough for a 3/4" air line?
Mark
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