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Countersinks & Counterbores
Countersinks, Center Drills & Spotting Drills
Center drills, also known as combination drill and countersinks, are short, thick bits used to start a hole prior to drilling. They have pilot tips that create an indentation or small-diameter hole in the workpiece to prepare it for drilling. This helps the twist bit to avoid walking and wandering off-center while drilling.
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Countersinks create cone-shaped holes in a workpiece that accommodate the heads of screws or rivets. These cone-shaped holes allow fasteners to sit flush with or below the surface of a workpiece. They come in a variety of fluted designs and materials and are used in metal, wood, and plastic.
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Motion Industries 1605 Alton Rd. Birmingham, AL 35210, USA (205) 956-1122