#Glass and tile drill bits cracked
I probably needed a flatter and stiffer backing, as I also cracked the glass during one attempt - see the photo. United Rentals stocks sturdy yet comfortable handheld core drills that can remove cores with up to a 4-inch diameter. 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. You will also have to be patient and use fairly light pressure.
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. Do not use these bits on hammer mode with your drill. COLLECT 20X BONUS CT MONEY® + save up to 25 on all qualifying tire purchases April 14 17. The 1/4 inch hex shank allows for quick and easy bit changes. A fine white powder is produced during the drilling. Glass and Tile Drill Bit Canadian Tire Fort Erie, ON Open Closes at 6:00 p.m. 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. Master Mechanic, 3/16 x 2-1/4, Glass & Tile Carbide Tipped Drill Bit, Spear Pointed Tip Reduces Breakouts When Drilling From 1 Side To The Other. I used a Bosch hand drill running at 1300 RPM (max recommended RPM is 2000) and backed-up the glass with 3/4" plywood. I tested them on probably what is the toughest job - old thin window glass, drilling fairly close to an edge. 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. Most Bosch products are "things of beauty", and I have to say these drill bits are no exception.
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