center bit


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center bit

center bit showing cutting end
A tool for boring holes in wood, held by a brace; the cutting end consists of a sharp point (or threaded center spur) for fixing the center of the hole, a projecting scoring edge for marking the circumference of the hole, and a sharp lip for cutting away the wood inside the circumference.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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4 ALIGN the center bit with the pilot hole on the opposite side of the door and complete the hole.
plywood over it to provide a solid surface for the center bit.
Align the center bit of the hole saw with the pilot hole and bore the hole.
Hole saws

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