Coupling apparatus for rotary surgical tool

A surgical accessory comprising a head forming an engagement axis extending from a working distal portion to a shank at a proximal engaging portion, the surgical accessory configured to engage a receiving socket of a rotary tool and comprising:

• a first shank portion of the shank forming a first engaging profile;
• a second shank portion of the shank forming a second engaging profile adjacent to the first shank portion;
• a locking groove interposed between the first shank portion and the second shank portion;
• and
• at least one alignment feature disposed on the second shank portion, wherein the alignment feature rotationally aligns the shank within a receiving profile of the receiving socket.

A coupling interface for a surgical tool comprising:

• a shank of an interchangeable tool accessory forming a proximal engaging portion comprising a receiving groove;
• a receiving coupler that receives the shank and forms at least one receiving profile extending about an engagement axis of the tool accessory;
• a locking collar operably connected to the receiving coupler;
• a release actuator in connection with the locking collar and forming an interior engagement surface, wherein the engagement surface comprises at least one ramp surface that radially varies about the engagement axis along a ramp angle;
• and
• a roller forming disposed between the locking collar and the at least one ramp surface, wherein a rotation of the release actuator about the engagement axis angularly repositions the ramp surface about the engagement axis and displaces the locking collar.