Boring Holes in Concrete Brickgreenspun.com : LUSENET : The Plumb Truth : One Thread
I need to bore a 1 1/2" hole in a concrete brick. Are there drill bits available to do this? Can they be rented? What other alternatives will do the job?
-- Dan Cordoba (firstname.lastname@example.org), August 02, 2000
Yes ther are drillbits to do this job, concrete coring bits(tilden kk26)with standard shank and hammerdrill bits(milwaukee brand)with special shank for milwaukee hammer drills which can possibly be rented
-- Randy Cisneros (email@example.com), August 17, 2000.
What I've done in the past, to drill through cement block walls is use a long 5/16" bit and drill multiple holes around the perimeter and knock out the center. The smaller bit goes much faster, I've tried larger 1 1/4" bits. Of course I was drilling 3" holes for a sewer line. It isn't as pretty but I was going to seal the hole with hydraulic cement anyway. When it was all finished it looked perfect.
-- Jerry Albrecht (firstname.lastname@example.org), August 15, 2001.