Importance

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Abstract

A tool bit adapter includes a base member including a cylindrical body having a receiving open chamber formed of a front small diameter portion, a rear large diameter portion and one or multiple through holes in communication between the small diameter portion and the atmosphere, a ball mounted in each through hole, an operating member slidably sleeved onto the cylindrical body and having an inside groove and a pressure face, a pusher accommodated in the cylindrical body and having one or multiple recessed retaining portions. When the pusher is in the rear end position, the pressure face of the operating member forces the balls toward the inside of the receiving open chamber into engagement with the respective recessed retaining portions. Thus, the tool bit adapter can positively detachably secure the loaded tool bit without any additional positioning structure.

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First Claim