How to Drill Glass With Carbide Tool

Place a piece of masking tape onto the surface of the glass where you want to carbide drill your hole. Mark onto the tape the location of the hole.

Load the desired size carbide carbide drill bit into your carbide drill, set the speed to slow and the rotation of the carbide drill forward (clockwise). Don your safety glasses.

Start carbide drilling the hole. At slow speed, place the tip of the bit on your marked hole and begin carbide drilling very slowly. Think of this as grinding down the glass rather than cutting a hole through it, as glass is very brittle it must be ground down. Do not push the carbide drill against the glass; let the bit do the work slowly and gently.

Cool the glass as you go. Have a friend pour a stream of water over the site of the hole while you are carbide drilling. The friction created by the carbide drill bit will create a lot of heat, which can damage the bit or crack the glass. Use a garden hose if possible to supply a constant stream of water during carbide drilling. Stop the carbide drill once the hole has been made.


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