Screwdriver

摘要

The present invention relates to a powered screw driver having a spindle (20) that is caused to rotate by an electric motor (10) within a range of about 5000 rpm (revolutions per minute) to about 7000 rpm (revolution per minute) when the spindle (20) idles. Because the spindle (20) rotates at a high revolution speed, the screw-fastening operation can more quickly be completed when the user of the screw driver (1) fastens the screw in a normal posture. The screw driver (1) may be used to fasten screws having a pitch within a range of about 1.3 mmm to 2.0 mm, (Fig. 2). <IMAGE>