On Nov 13, 7:55*pm, "MiamiCuse" wrote:
"BobK207" wrote in message

...
On Nov 13, 6:37 pm, "MiamiCuse" wrote:



I would like to drill a hole through my 8" concrete block wall to pass a
1/2" schedule 40 PVC pipe through from the outdoor to the inside courtyard
area to continue the sprinkler branch.

Problem is I have a 9/16" hammer drill, I don't have a mean heavy duty
demolition hammer drill.

I believe a 1/2" niminal PVC pipe has an outside diameter a little bigger
than 3/4". Is there a masonry bit longer than 8" and wider than 3/4" that
could be used for my hammer drill? Or do I need to rent a big one from the
tool store just for one hole?

If there is not one big enough, is there something else I can do to get
around this - for example, using 1/2" CPVC - those are much skinnier and
if
I can just use that for the stretch through the block...don't know,
probably
not a good idea.

Thanks,

MC

OD of 1/2" pipe is .840"

you really need a rotary hammer with a 7/8 bit. * *

but this might work... search string was........ * 7/8 masonry bit
with reduced shank

http://www.hermanscentral.com/produc...it-w-12-reduce...

what size bits do you currently have?

In your situation, I'd drill through with 3/8 or 1/2, bump up to 9/16
(or skip it if you started with 1/2), finish with the 7/8

or *rent a larger hammer with a 7/8" bit & blow through it.

cheers
Bob

Bob the biggest masonry bit I have is 1/2", but I have no bits that is
longer than 8" so I need bits in any case. *I just wasn't sure if a big bit
with a smaller shank will actually have the power to do the job, I know the
right hammer will chew through it like butter.

MC

Will your 1/2" bit drill drill through the entire wall thickness?

If so, then it will have removed ~1/3 of the total material needed to
be drilled out.


As another poster had mentioned (& you as well), a proper sized hammer
& bit will make short work of the hole.

Years ago before I switched to Hilt TE-Y and Milwaukee SDS hammers,
I had a hammer drill with "standard" drill chuck, the bits would
always come loose.

If yours stays tight you might be able to do the job purchasing a
couple new bits (maybe 1/2" or 9/16" in addition to the 7/8" bit) for
less than rental...its a tossup. Try to get rotary / percussion bits
without reduced shank if they will fit the drill.

It might be more difficult with the littler hammer drill but after its
done you'll have a set of bits & capability.

I think these bits are probably a better match to your tool.

http://www.hermanscentral.com/depart... ssion)%20Bit


cheers
Bob