Powered high speed rotary surgical handpiece chuck and tools

A high speed rotary surgical handpiece having a centrifugal chuck for axial push-in chucking and axial pull-out release of a patient tissue working tool, said chuck comprising:

• an axially extending drive shaft having a rotatably driveable rear end portion and having a hollow front end portion comprising a rotational axis and a coaxial central passage for receiving a rear shank portion of a tissue working tool to be rotatably driven;
• a centrifugal locking member with a generally axially extending bight located on a first side of said rotational axis, a rear portion fixed on said bight and pivotable about an axis transverse to said rotational axis, a front leg extending radially inboard from said bight and radially past said passage, said front leg having a tool gripping means on the opposite side of said rotational axis for receiving a tool rear shank portion rearward axially therepast and for more strongly radially gripping such a tool in response to faster rotation of said drive shaft, and to resulting increasing centrifugal radial outward force on said bight.