spur

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Auger bitAn auger bit is used with a mechanical or powered brace for drilling holes. A typical woodworking auger, or carpenter's auger, consists of six distinct functional components: feed screw, cutting lip, spur, twist, shank, and tang.

Labeled diagram showing a carpenter's brace and bit, with the auger bit's parts-feed screw, spur, cutting lip, twist, shank, and tang-plus the brace's jaws, shell, ratchet, bow, head, and handle.

spur

tool part

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auger
…are two sharp points called spurs, which score a circle equal in diameter to the hole, and two radial cutting edges that cut shavings within the scored circle. The twist is helical and carries the shavings away from the cutters. The tang is square and tapered and fits in the…
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…are two sharp points called spurs, which score a circle equal in diameter to the hole, and two radial cutting edges that cut shavings within the scored circle. The twist is helical and carries the shavings away from the cutters. The tang is square and tapered and fits in the…
Read More