An attachment includes a body, an impact portion defining an impact axis and configured to receive repeated impacts from the powered hammer, and a driving portion including a side load driving portion and a top load driving portion that alternately receive the rod to transmit driving forces from the repeated impacts to the rod. The side load driving portion defines a side load driving axis that is offset from the impact axis. The top load driving portion includes a blind bore and defines a top load driving axis that is coaxial with the impact axis. The top load driving portion includes a sleeve disposed within the blind bore and configured to decrease wear of the blind bore during use.

An eccentric drive 1 for a portable power tool 2 has a motor 5, an eccentric wheel 6, a linear guide 9, a slide 8 and a connecting rod 7, which has a head 17 suspended on the slide 8 and a second head 15 suspended on the eccentric wheel 6. A bearing bush 16 for the rotatable mounting of the connecting rod 7 is provided at least on one of the two heads 17. The head 15 is composed of an injection molding material. The bearing bush 16 is composed of a fiber composite material, which includes continuous carbon fibers 25 embedded in a thermoplastic matrix.

An electric hammer includes a housing, an electric motor, an output assembly, an impact assembly, a mounting shaft, a clutch assembly, and a switching assembly. The mounting shaft is rotatable about a second axis. When the electric hammer is in the drill mode, a sleeve of the output assembly rotates. When the electric hammer is in the hammer drill mode, the sleeve rotates and an impact block of the impact assembly reciprocates in the sleeve. The switching assembly is configured to switch the clutch assembly between a first state and a second state and includes a switching element. The switching element includes a forced end and a drive end, the output assembly moving along a first axis drives the forced end to move, and the drive end is configured to drive the clutch assembly to be switched to the first state.

A hand-held power tool, in particular a demolition hammer, with an impact mechanism assembly includes an electric motor, an eccentric assembly, and an impact pin oscillating linearly along an impact mechanism axis. The eccentric assembly includes an eccentric wheel mounted in an impact mechanism carrier of the impact mechanism assembly, an eccentric wheel rotating about an eccentric axis, and a connecting rod driven by the eccentric wheel. The electric motor has a motor shaft along a motor axis which drives the impact piston by way of the eccentric wheel and the connecting rod. The eccentric wheel has an eccentric hub formed on one side, which is mounted along the eccentric axis on a side of the eccentric wheel facing away from the connecting rod proximally with a floating bearing and distally with a fixed bearing in the impact mechanism carrier.

A power tool including a brushless motor having a sensor circuit board has higher durability. The power tool includes a housing, a brushless motor including a rotor having a rotational shaft, a stator, and a sensor circuit board fixed to the stator and having a rotation detecting element that detects rotation of the rotor, and receiving the rotational shaft through the sensor circuit board, and a bearing held in the housing and supporting the rotational shaft. The bearing is located to overlap the rotation detecting element in an axial direction of the rotational shaft.

A roller bearing for at least one set of roller bodies, which are disposed in an annular manner, the roller bearing having at least one track element with a track, on which the roller bodies are provided for rolling. The track comprises a track base having a circular circumferential The track element comprises, on each axial side of the track base, a shoulder or a rim for the roller bodies, each shoulder or rim having a circular circumferential line. The track element is formed such that, as viewed perpendicular to the planes defined by the circumferential lines, all center points of the three circumferential lines are different from each other.

An electropneumatic impact mechanism for an electric hand-held power tool, in particular a hammer drill and/or chipping hammer, wherein the impact mechanism has a transmission housing, a guide tube arranged at least partially in the transmission housing, an exciter piston that is movable in the axial direction in the guide tube, a connecting rod coupled to the exciter piston, and an eccentric wheel which is coupled to the connecting rod on one side and is mounted so as to be rotatable with respect to the transmission housing on the other side, wherein the impact mechanism has a bearing body on which the eccentric wheel is mounted rotatably by means of a pair of plain bearings.

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.

An impact rotary tool includes a hammer, an anvil, an output shaft, a housing, and a bearing (first bearing). The bearing (first bearing) is held by the housing. The anvil includes a first contact portion. The output shaft includes a second contact portion. The second contact portion receives, from the first contact portion, force that causes the output shaft to rotate. The bearing (first bearing) is in contact with at least one of the first contact portion or the second contact portion and supports at least one of the output shaft or the anvil rotatably.

A hydraulic hammer includes a power cell. A work tool is partially received in, and movable with respect to, the power cell. A sleeve is positioned in the power cell that defines a centerline. A piston is concentrically positioned in the sleeve and movable in the sleeve between a first position in contact with the work tool and a second position out of contact with the work tool. A magnetic guide system includes at least one of a first magnetic guide component disposed in the piston and at least one of a second magnetic guide component disposed in the sleeve that interact to produce magnetic repellent forces therebetween to urge the radial position of the piston towards the center line.