Quick change adaptor for hole saw

摘要

A quick change adaptor for a hole saw includes an arbor, a collar and a retaining nut. The adaptor allows a hole saw to be easily and efficiently mounted and dismounted to and from the adaptor. When mounted to the adaptor, the hole saw and collar rotate relative to the arbor and the retaining nut. Rotation of the collar and hole saw relative to the retaining nut is limited by the interaction between an arbor boss and a collar recess to provide a drive force to the hole saw.