Patent ID: 7121361

Claim:
An electric power tool, comprising: a housing; a motor encased in the housing and having an output shaft producing a torque; a spindle provided at a front end of the housing, the spindle receiving the torque and capable of rotation; a gear unit provided between the output shaft of the motor and the spindle for transferring the torque to the spindle, the gear unit including a first gear having a first diameter and a second gear having a second diameter different from the first diameter; and a switchover mechanism for coupling the torque of the output shaft to the spindle, said switchover mechanism being slidably movable between a first position to enable the spindle to receive the torque via the first gear and to rotate the spindle at a first speed, a second position to enable the spindle to receive the torque via the second gear and to rotate the spindle at a second speed, and into a third position to enable the spindle to receive the torque without employing the first and second gears and to rotate the spindle at a third speed.