Patent ID: 8434976

Claim:
A hole saw mandrel assembly comprising: a mandrel having a body with a first end for coupling with a drill motor, a second end extending from said body, said second end including a thread for receiving a hole saw; a first member on said second end, said first member axially movable on said second end; a friction surface on said first member, said friction surface adapted for contacting a base surface on the hole saw such that the hole saw is fixed in position, said friction surface moving between a first contact and a second release position; a mechanism on said mandrel adjacent said first member for moving said friction surface between said first and second positions; and said mechanism including an auxiliary biased collar and a bearing race, the collar and bearing race are separate and distinct from one another, said collar and bearing race having a mating mechanism for enabling rotation of said bearing race which, in turn, enables said friction surface to move between said contact and release positions.