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Vessel Sink - Bit Size and Type (Drilling through Slate)

I am installing a vessel sink on top of 1/2" plywood covered with 3/8-1/2" slate tile countertop.  I  need to drill through slate without it seperating or chipping/cracking on me.  I heard that a "Carbide" bit is needed but I don't kow what size.  The drain to the sink looks to be 1 3/4".  CAn anyone confirm that this is a standard size drain and 1 3/4" bit size is correct.  Any other tips I should know before I start driling through slate? Thanks!

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Posted 2013-04-02T20:58:31+0000  by blondie460 blondie460

Hello blondie460.  Welcome to the Community!


While a 1 3/4" hole size is indeed common for vessel sink installations, it is NOT a standard.  Since you have measured the drain, I must assume that this common size will work out for you.


I always prefer to use a diamond grit type hole saw for stone, including something softer like slate.  These bits look like this:


diamond bit.jpg

Is this what you are looking for?





Posted 2013-05-07T20:31:11+0000  by Chris_HD_CHI
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