Rotary and impact drill ratchet mechanism - has ring with teeth sloping at 20 degrees and flanks at 45 degrees

摘要

The rotary and impact drill has a ratchet mechanism which includes a stopped sleeve (3) with a ring of ratchet teeth (2) at one end, on a face at right angles to its axis of rotation. This sleeve is designed for rotation in either direction. The contact face (4) of each tooth slopes at an angle of about 10 deg. to the vertical face, and the flank (1) slopes at an angle of 45 deg..