![]() ![]() I probably needed a flatter and stiffer backing, as I also cracked the glass during one attempt - see the photo. Glass and Tile Drill Bits 3.0 (2) Write a review Our Glass and Tile Drill Bit features an exact start tip for clean holes and minimal bit walking in glass and ceramic tile. In my test, I did get some concentric fractures on the backside of the glass, kind of like when a bullet passes through window glass. ![]() It would be best to use a cordless drill or GFCI protected tool as keeping the surface of the pot slightly wet will help reduce any heat buildup. We recommend starting at a low RPM and steady pressure. You will also have to be patient and use fairly light pressure. The GT3000 Glass and Tile Bit set can be used with different tile material. By the way, these bits are not intended to be used on any kind of stone, such as marble - drill glass and ceramic tile only. ![]() A fine white powder is produced during the drilling. I can confirm that holding the bit fairly close to perpendicular does in fact easily keep the bit from "walking" when starting the hole, which is quite impressive on a hard flat surface like glass or ceramic tile. I used a Bosch hand drill running at 1300 RPM (max recommended RPM is 2000) and backed-up the glass with 3/4" plywood. They're made with either tungsten carbide or a diamond. I tested them on probably what is the toughest job - old thin window glass, drilling fairly close to an edge. Unlike typical drill bits that can easily crack or shatter your workpiece, glass drill bits are designed with extremely hard tips. If you examine them closely you can't help but notice their high quality "look" right down to the dark and clear character etching on the shafts. Small Diamond Glass & Hard Tile Drill Bits Supreme-Series Dry and Wet Coring Supreme-Series Wet Coring Only Showing 126 of 52 results Carbide Quad Tip Glass and Tile Drill 7.95 33.45 SIZZLE BITS For Super Hard Tile and Glass 10.99 15.50 Carbide Tipped with Spear Point Glass and Tile Drills 11.88 29. Most Bosch products are "things of beauty", and I have to say these drill bits are no exception. 4 x spear pointed, double chamfered, Tungsten Carbide blade Drills perfect holes in seconds wet or dry through glass, porcelain and the hardest ceramics Bits. ![]()
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