A quick-locking tool holder adaptor for high torque power tools

A quick-locking tool holder adaptor for an impact wrench, the adaptor comprising:

• a main body having a drive portion located at a first end thereof and a tool bit receiving portion located at a second opposite end thereof, wherein the drive portion comprises a square bore configured to receive a square drive of an impact wrench, and the tool bit receiving portion is configured to receive a tool bit with a 7/16 inch hexagonal shank within a longitudinal bore;
• and
• a tool bit locking system, comprising:
• at least one ball bearing seated within a corresponding radial bore provided in the tool bit receiving portion such that, in use, each ball bearing projects into the longitudinal bore and engages with the shank of a tool bit received therein;
• and
• a sleeve that is slidable on the outside of the tool bit receiving portion between a lock position, in which each ball bearing is prevented from retreating from the longitudinal bore, and a load position in which each ball bearing is free to retreat completely from the longitudinal bore;
• wherein the sleeve is urged towards the lock position by resilient biasing means;
• and
• wherein, in the load position, a portion of the sleeve extends beyond the tool bit receiving portion and the extent to which the sleeve can extend beyond the tool bit receiving portion is limited by a retaining ring, located proximal to the second end of the main body.