Recent content by Boland

Thanks for the reply. I went very slowly, about 2 revolutions per second at first. I could make out the markings on the bit. Then sped up a little at a time to maybe 200 revs/min. And I kept the hole and bit wet with a spray bottle set on stream. It still wore down (diamond came off the bit, as...

Thanks for the quick reply, boss. Probably can’t spring for the Roto. I do have a hammer drill, but was afraid I’d just crack the tile. I did try small first with no luck. Literally erased the blade on an 1/8” ceramic & glass bit in seconds. And the smallest diamond tipped porcelain bit I could...

As I noted, I got through the marble and I believe the next layer probably is porcelain. Thanks for the alternate hole suggestion. There are indeed 4 other holes on the ring itself, but unfortunately I ran into the same issue with them. This Suuuuuuucks!

I have burned through 5 bits trying to drill into my bathroom floor in order to secure a new repair flange. The top layer is marble, which I’ve drilled through with a Tapcon carbide tipped concrete bit. Since then I have tried every type of bit: black oxide, cobalt, titanium, carbide, glass &...