| 摘要 |
An adapter (10, 110) for use with a powered grinding tool having a driven grinding wheel (13) has a pivotally movable mounting part (16, 128) on a body thereof, and a drill bit holder (15, 116) engageable with the mounting part in either of two orientations for sharpening a tip of a drill bit (20, 124) clamped in a set position in the drill bit holder at said grinding wheel (13), the engagement being completed when the drill bit engages on a stop bar (34, 136) at the front of the mounting part. Also disclosed is a setting arrangement for setting the drill bit in its holder including stop means (143) for engagement by the drill tip upon longitudinal setting of the drill bit, and drill rotation setting means (145) slidable relative to the stop means for rotational setting of the drill bit. A powered grinding tool having the features of the adapter formed as part thereof is also disclosed.
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