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Tack122 t1_j25w323 wrote

Reply to comment by luv_____to_____race in Help drilling a hole through kitchen countertop & flange of undermount sink for a water filter by [deleted]

Well you'd need a hammer drill for a center bit in stone/concrete. Just spinny would grind off the tip and you'd never sink in.

I could imagine some sort of complicated dual clutched system where the hole saw rides on a hammer drilling center bit, but that'd be a very specialized drill.

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luv_____to_____race t1_j25zhn4 wrote

We can't use ANY hammer drill on stone tops, the many repeated impacts will eventually cause failure in the material. Some may work, most won't. Quartz is made up of about 93% natural Quartz chips, and the rest an epoxy binder resin. It's heated and pressed together in a huge line, and when cooled is extremely durable, but if you start creating point heat/impacts nearing the manufacturing process, all bets are off.

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100GbE t1_j267g21 wrote

Diamond tip bits work well in tile, stone masonry - don't need to use hammer either.

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