BATTERY POWERED SCREWDRIVER AND SCREW STARTING DEVICE

摘要

A power tool that permits automatic or manual use through a spindle lock. The spindle lock (50) has a shaft (47) and spindle (46) that define an axis of rotation relative to the housing. The spindle lock (50) also contains a collet (52) having a sleeve (550) that includes a collet (52) engaging portion disposed on an inner surface of the sleeve (550) and an opening centered on the axis for receiving a member disposed in said housing to permit axial sliding movement between a locked position and an unlocked position. A spindle emgaging portion (81) is disposed on the spindle which engages with the collet portion means (530) when the collet is moved in the locked position and rigidly locking the collet and the spindle together to prevent rotational movement of the spindle for manual use.