Surgical device with smart bit recognition collet assembly to set a desired application mode

A surgical drill/driver including:

• a body mounting a motorized shaft with a connected driver bit for driving a surgical screw;
• and
• a controller cognizant of a torque level output of said drill/driver, wherein said controller determines a thread insertion stage of operation as being prior to a first spike in output torque acceleration, a surgical screw head to object contact stage of operation subsequent to said first spike in output torque level acceleration and prior to a second spike in output torque acceleration and a compression stage of operation subsequent to said second spike in output torque acceleration wherein said controller shuts off surgical drill/driver to prevent strip out after said second spike in output torque level acceleration.

A surgical drill/driver including:

• a body mounting a motorized shaft with a connected driver bit for driving a surgical screw;
• and
• a controller cognizant of a torque level output of said drill/driver, wherein said controller determines a first peak in output torque level, a first valley in output torque level subsequent to said first peak in output torque level, and a negative first derivative in output torque level subsequent to said first valley in output torque level wherein said controller shuts off said surgical drill/driver to prevent strip out of a surgical screw from a patient's bone matter.