High Speed Diamond Core bit for granite, marble, quartzite, quarts, engineered stone, concrete counter tops, and all natural stone.With diamonds on the barrel to reduce drag, heat, and friction, along with high diamond content segments, dry diamond core bits can drill holes in 3cm granite in less than 30 seconds. The High Speed Diamond Core Bits are the best dry diamond core bit for granite and engineered stone counter top faucet hole drilling. They can also be used wet with Air Polishers in shop applications. What makes the High Speed Diamond Core Bit different from others and the best Diamond Core Bit on the Market? Speed of drilling: The Diamond Core Bit will drill a hole through 3cm Uba Tuba Granite in less than 30 seconds at 10,000 rpm. Diamonds on the Barrel: The vacuum brazed diamonds promote faster drilling when the bit is being "rounded" during the drilling process, and also allow you to enlarge the hole. So if you need to make the hole a little bigger, just run the Diamond Core Bit like a Vacuum Brazed Zero Tolerance wheel and make the hole bigger. This also works excellent when you are doing inside and outside radius holes, or making grommets fits nice and smooth. Use it Dry: These granite and stone core bits can be used dry for job site counter top applications, including: faucets, sink corners, creating radius holes, grommets, and other on site fabrication work. Just screw them onto a grinder, turn up the rpms, and get it drilled fast! Use it Wet: For in shop use, were granite counter top fabrication is primarily done wet, attach the Diamond Core Bit to any air polisher, or electric wet polisher and run at least 4,000 rpm. It will drill just as fast, if not faster, than wet core bits. Bites Fast: When starting to drill the most important thing is getting the diamond core bit to "bite" into the stone as fast as possible to prevent walking. These Core Bit Diamonds are fully exposed from the get go. This allows the bit to suck down into the stone the millisecond it touches the stone to prevent any chance of walking. Drill Many Holes: Just because the Next Gen Core Bits are fast doesn't mean they won't last long. Depending on use, thickness of the material, hardness of the stone, and the abrasiveness, one can fully expect between 60-150 holes per bit. Many Types of Material: Diamond Core bits will drill in any material that is fabricated: granite, marble, engineered stone, concrete and even the super hard quartzite stone. Next Gen Diamond Core Bit is the best diamond core bit for granite and stone counter top fabrication. For optimum drilling run at 10,000 rpm. Dry use. May be used wet. 4" total length 5/8-11 thread
