percussion bit

percussion bit

[pər′kəsh·ən ‚bit]
(mechanical engineering)
A rock-drilling tool with chisellike cutting edges, which when driven by impacts against a rock surface drills a hole by a chipping action.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Use a percussion bit to drill the holes the same size as the anchor.
How to Use: With a percussion bit the same size as the anchor, drill a hole directly through the wood or bracket and into solid concrete, concrete block or brick.