Battery powered screwdriver and screw starting device

摘要

A power tool comprising a housing having a member disposed therein and a spindle for receipt of a tool bit wherein the spindle is retained on a shaft. The spindle and shaft define an axis of rotation relative to the housing. The power tool further comprises a collet having a sleeve that includes a collet engaging portion disposed on an inner surface of the sleeve and an opening centered on the axis for passage of the shaft therethrough and for receiving the member disposed in said housing to permit axial sliding movement between a locked position and an unlocked position. The power tool further comprises a spindle engaging portion disposed on the spindle wherein the spindle engaging portion engages with the collet portion means when the collet is moved in the locked position thereby rigidly locking the collet and the spindle together to prevent rotational movement of the spindle.