The invention relates to a power drill, having a tool-clamping device that is coupled to a drive motor via a drive shaft and a torque clutch equipped with a transmission element. The torque clutch has a clutch-adjusting ring that cooperates at least indirectly with at least one clamping element that exerts a prestressing force on the transmission element. An end of the drive shaft oriented toward the tool-clamping device is guided in a bearing that axially fixes the drive shaft in a drilling or screwdriving position and axially releases the drive shaft in an impact drilling position. The bearing cooperates with a bearing holder, which moves the bearing axially via a user-actuatable actuating element. According to the invention, the actuating element is coupled to an adjusting element that axially fixes the transmission element and axially releases the bearing in the impact drilling position and axially releases the transmission element and axially fixes the bearing in the drilling or screwdriving position.

A power tool includes a drive mechanism including an electric motor, a housing, and a spindle rotatable about a longitudinal axis in response to the drive mechanism. The power tool further includes a lockout mechanism including a plurality of detents asymmetrically positioned around the longitudinal axis, where each of the detents are movable between a locking position and an unlocking position. The power tool also includes a collar rotatably coupled to the housing, the collar including a plurality of recesses asymmetrically positioned around the longitudinal axis, wherein in the unlocking position, each of the detents is received in one of the recesses and the spindle is axially movable within the housing, and wherein in the locking position, at least one of the detents is not received in one of the recesses and axial movement of the spindle is prevented by the lockout mechanism.

A rotary hammer includes a housing including a motor housing and a secondary housing. The rotary hammer includes an output device configured to provide a rotational output, an axial hammering output, or both the rotational output and the axial hammering output. The rotary hammer also includes a transmission mechanism situated within the secondary housing. The rotary hammer also includes a light holder with a plurality of light sources distributed around an output axis of the rotary hammer. The light holder includes a ring portion mounted to a front surface of the secondary housing. The light holder also includes an extending arm that extends downward and away from the ring portion in a channel of the secondary housing. The rotary hammer includes lighting power wires that are located within the channel and that are covered by the extending arm.

A rotary hammer includes a housing and a mode selection dial supported in the housing. The mode selection dial includes a cam. The housing supports a motor providing a rotational output. The housing supports a linkage moveable between a first position and a second position in response to engagement by the cam. A loss-of-control detection system measures acceleration of the housing and disables the motor upon the acceleration exceeding an acceleration threshold. The housing supports an operating mode detection system including a magnet and a Hall-effect sensor. The magnet is coupled to the linkage and moveable therewith between a third position corresponding to the first position of the linkage and a fourth position corresponding to the second position of the linkage. The Hall-effect sensor provides an output signal indictive of the position of the magnet. The loss-of-control detection system is selectively disabled based upon the output signal.

A rotary power tool comprises a drive mechanism including an electric motor and a transmission, a housing enclosing at least a portion of the drive mechanism, a spindle rotatable in response to receiving torque from the drive mechanism, a first ratchet coupled for co-rotation with the spindle, a second ratchet rotationally fixed to the housing, a sleeve bushing supported by the housing, and a bearing rotatably supporting the spindle. The spindle has an outer race. And, the outer race of the bearing moves along the sleeve bushing during reciprocation of the spindle when the first ratchet and second ratchet are engaged.

A hand tool device has a hammer mechanism including a hammer, at least one curve guide which drives the hammer at least during the hammer drilling operation, and at least one hammer mechanism spring which (i) stores at least a part of an impact energy in at least one operating state, and (ii) holds the hammer in the peripheral direction in at least one operating state.

A planetary gear system with a sun gear, a ring gear co-axial with the sun gear, at least one planetary gear meshing with both the sun gear and the ring gear, and a planetary gear carrier which rotationally supports the at least one planetary gear. A torque clutch is supported by and connected directly between two of the sun gear, the ring gear, the at least one planetary gear and the planetary gear carrier. The torque clutch prevents relative rotation when an acting torque is below a predetermined torque value and allows relative rotation when the acting torque is above the predetermined torque value. A torque threshold adjustment mechanism is provided for adjusting the predetermined value of the torque at which the torque clutch slips.

A drill has a housing, a motor mounted in the housing having a drive spindle, an output spindle rotationally driven by the drive spindle via a torque clutch. The torque clutch slips when the torque across the torque clutch exceeds a predetermined value. The predetermined value of the torque at which the torque clutch starts to slip is adjustable via a torque threshold adjustment mechanism. A sleeve is rotatably mounted on the output spindle. The drive spindle drives the sleeve via a gear system at a same rate and direction as the output spindle so that there is no relative rotation between the sleeve and output spindle when the torque clutch is not slipping and at a different rate and/or direction so that there is relative rotation between the sleeve and output spindle when the torque clutch is slipping.

An electric power tool includes a housing, a motor, a deceleration mechanism, a final output shaft, a vibration mechanism, a vibration switching member, a stop member, and an expansion prevention portion. The vibration mechanism provides a vibration in an axial direction to the final output shaft. The vibration switching member is accommodated in a slit axially disposed on a front end of a tubular portion and moved back and forth in the slit by an operation from outside to switch on and off actuation of the vibration mechanism. The stop member is installed on the front end of the tubular portion to cover the slit. The expansion prevention portion is disposed on the stop member and is brought in contact with an outer periphery of the front end of the tubular portion to prevent the front end of the tubular portion from expanding,