Shank size: 1/4"
Limited stock. Metal-Bond Diamond Core Drills - Use drill press. Hand held tool is not recommended - Speed 5,000 to 20,000 RPM - Choke up on point, extend drill beyond chuck jaws only as needed to go through workpiece. - Submerge in water or use constant flow. - Use rapid up and down motion when drilling, light to moderate pressure. -Important:Always recognize that the drill tip must always have coolant. A combination of excessive speed, pressure, dwell without lifting the drill, will deprive the drill of water and the tip may overheat. Size: 7/16"dia. x 3" long (approx.)
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