How To Drill A Hole In Granite Countertop. Start by measuring the diameter of the object that is being installed. Once you have the core use a 125mm small diamond drill bit to drill another hole with which to thread your wire through.
Cut a guide hole with your hole saw out of a scrap piece of ceramic tile or a thin 18 to 14 piece of wood and clamp it or have someone hold that with two hands firmly. For larger diameter holes. Place a bucket beneath the countertop directly under where the hole will be drilled.
I recently purchased a 12 inch diameter one cost me about 20 and I drilled a hole through a granite countertop.
Determine the ideal hole size your application requires. Use your diamond drill bits at slow speeds especially when making the initial hole. First you need a hole saw guide. For a 2 inch hole you need a drill that has good torque at low speed I think an 18 volt cordless.
