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I work for a glass shop and we install custom shower doors in our customers homes. Lately we have been coming up against some tough tile and are having a hard time drilling thru it. We have tried wet and dry drill bits but there doesn't seem to be anything that works real well. Does anyone have any recommendations for a good drill bit?
Thanks for any help,
 

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I've used carbide tipped and ordinary steel twist drill bits, they both go right through tile. I'm not sure if I was drilling through ceramic or porcelain tile though.
 

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I've used carbide tipped and ordinary steel twist drill bits, they both go right through tile. I'm not sure if I was drilling through ceramic or porcelain tile though.
That won't touch hard italian porcelain. Diamond hole saw, grout sponge and a spray bottle of water.
 
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Diamond hole saws. As Inner said, drill through a wet grout sponge for cooling. The larger saws I pack with ice.

Tom
 

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CRL used to sell some really great carbide tipped bits. They went through anything. Of course, with CRL, once they know it works, they get rid of it. :whistling

These days, I use a mix of the small diamond hole saws and masonry bits. With water of course.
 
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