A rotary hammer includes a motor, a spindle coupled to the motor for receiving torque from the motor, a piston at least partially received within the spindle for reciprocation therein, and an anvil received within the spindle for reciprocation in response to reciprocation of the piston. The anvil imparts axial impacts to a tool bit in response to reciprocation of the piston. The rotary hammer also includes a bit retention assembly for securing the tool bit to the spindle.

A chuck for a chiseling power tool has a holding sleeve that is arranged concentrically with respect to a working axis and that serves to receive one shank end of a tool having a locking groove. A locking element protrudes partially into the holding sleeve so as to engage with the locking groove. A sliding block guides the locking element, whereby the sliding block has a section that is wound helically around the working axis.

A rotary hammer includes a motor, a spindle coupled to the motor for receiving torque from the motor, a piston at least partially received within the spindle for reciprocation therein, and an anvil received within the spindle for reciprocation in response to reciprocation of the piston. The anvil imparts axial impacts to a tool bit in response to reciprocation of the piston. The rotary hammer also includes a bit retention assembly for securing the tool bit to the spindle. The bit retention assembly includes a collar with an indicator thereon. The indicator is at least partially visible to a user of the rotary hammer when the tool bit is improperly inserted within the spindle.

A tool holder for a rotating and chiseling portable power tool is disclosed. A hollow spindle surrounds, coaxially with a working axis, a receiving space for receiving a tool. The hollow spindle has at least one cutout in the radial direction. An insert is inserted into the cutout in the radial direction. The insert has a rib that protrudes into the receiving space in the radial direction. A channel is arranged within the cutout and extends along the working axis. The channel is open into the receiving space and is bounded by the insert and an inner face of the cutout.

A method employing an apparatus in conjunction with a hammer-drill to penetrate composite metal and non-metal structure or structures including, for example, thick metal or rebar encountered during concrete, rock or masonry boring operations without requiring a change in drill equipment.

A tool socket 2 for a hand-held power tool has a tubular main body 17 and a dust cap 27. The main body 17 has an end face 19 that is adjoined by a cylindrical or prismatic outer surface 36. As seen in the insertion direction 20, the dust cap 27 consecutively has a sealing ring 28, a middle section 29 and a seat 30. As seen in the insertion direction 20, the sealing ring 28 is arranged in front of the end face 19 of the main body 17. The seat 30 has a cylindrical or prismatic inner surface 35 that is in contact with the outer surface 36 of the main body 17. The middle section 29 has a conical inner surface 39 whose inner diameter 40 decreases in the insertion direction 20 down to the inner diameter 37 of the seat 30.

Two balls can reliably retract for smooth insertion of a tip tool into a tool holder. A hammer drill includes a tool holder, two balls in reception holes in the tool holder, a guide washer urging the balls forward in the reception holes with a coil spring, a pressure ring adjacent to a front of the guide washer, and an operation sleeve allowing the pressure ring to move backward and forward between locked and unlocked positions of the two balls. The guide washer includes, on its front surface, a projection toward the pressure ring to cause, with the pressure ring at the locked position, the guide washer to be inclined with respect to an axis of the tool holder for a first ball to move more backward than a second ball.

A power tool includes a spindle rotatable about an axis and a bit holder supported by the spindle, the bit holder including a recess configured to receive a tool bit to couple the tool bit for co-rotation with the spindle about the axis. The bit holder further includes a sleeve movable along the axis between a locked position, in which the bit holder prevents removal of the tool bit from the recess, and an unlocked position, in which the tool bit is removable from the recess. The sleeve is coupled for co-rotation with the spindle.

Tool fitting device for a power tool, in particular a chipping hammer, includinga holding device for receiving and holding a tool shank, a retention element extending at least around a section or sections of the holding device, and a dust protection device for preventing the penetration of dust into the tool fitting device. The dust protection device includes at least one first dust stripping element, at least one fixing bead, and at least one sealing lip element, wherein the sealing lip element is positioned in front of the retention element in the axial direction. Dust protection device for use in a tool fitting device.

A tool holder for a rotary impact tool can include a plurality of retention members, an anvil movably received in a spindle and configured to impact a bit, the spindle defining a longitudinal axis and including a channel extending along the longitudinal axis, and a plurality of slots that open into the channel and are sized to receive the plurality of retention members, and a chuck collar that is rotatable about the longitudinal axis to selectively place the tool holder in an unlocked configuration and a locked configuration. The chuck collar can include a plurality of sockets sized to receive the plurality of retention members. The plurality of retention members can be recessed in the plurality of sockets in the unlocked configuration and extend through the plurality of slots into the internal volume in the locked configuration.