The Alpha® Wet Core Drill Bit is designed to work on a drill press with a water swivel attachment or free-hand using a wet polishing tool such as the AIR-658, AWP-158 or VSP-110. Since it must be used wet, a tool with a central water-feed or a water swivel is necessary. The direct sintered metal segments are brazed to the steel core and provide the long life and aggressiveness expected from a quality core bit.
Alpha Professional Tools® introduces a Dry Core Bit designed for use on the job site without using water. Our Dry Core Bits fit on a high-speed angle grinder with a 5/8” -11 spindle. The Alpha® Dry Core Bit provides the best cutting performance and can drill through the toughest 1-1/4” granite or engineered stone countertop at the job site without using water. Not only is this convenient but it also increases productivity by cutting down on the amount of clean up needed when using water.
Both Alpha Wet and Dry diamond core bits can be used for drilling holes for concrete countertops. Alpha dry diamond core bits can be used at high speed (10,000 RPM) without using water, while drilling at lower speed (3500 RPM) on concrete, both dry and wet bits should use water.