An electrospindle includes a motor for moving a tool and a motor shaft for transmitting motion from the motor to the tool. The electrospindle has a gripping head of the tool and a coupling of the tool to the motor shaft, and the gripping head includes two flanges, between which a portion of the tool and at least one thrust nut of a first flange can be interposed toward a counterflange, so as to hold the tool in position. The transmission has a free end threaded so as to receive the at least one thrust nut by screwing, the thread of the free end being double with a first right-handed thread and a second left-handed thread.

A power tool includes an output shaft, an installation apparatus and a retention mechanism. The installation apparatus has an operation state and an installation state. The retention mechanism is capable of providing a retaining force that keeps the installation apparatus in the installation state. The retention mechanism includes a movable piece. The output shaft is formed with a guide rail that guides the movable piece to move. The movable piece is capable of moving along the guide rail to a first retention position and a second retention position. When the installation apparatus is in the installation state and receives a rotation force applied by the operation accessory, the rotation force causes the movable piece to move from the second retention position to the first retention position so that the installation apparatus is switched from the installation state to the operation state.

An adjustable mechanism for an angle drill or a die grinder, including a receiver, including a first section, and a second section connected to the first section, a mating component, a tension component arranged on the second section, and an axial sliding support operatively arranged to be secured to the second section, wherein at least one of the first section and the mating component includes a plurality of holes and the other of the first section and the mating component includes one or more pins, the one or more pins being operatively arranged to removably engage the plurality of holes.

The invention refers to a double-sided polishing or sanding member (24) for releasable attachment to a hand-guided power tool (2). The polishing or sanding member (24) has an essentially disc-shaped form with an areal extension (26). A reinforcement plate (28) is located inside the polishing or sanding member (24) in the areal extension (26). The reinforcement plate (28) has a central attachment portion (30) for releasable attachment of the polishing or sanding member (24) to the power tool (2). It is suggested that the central attachment portion (30) comprises at least one magnetic element (32) adapted for interaction with at least one respective magnetic element (34) directly or indirectly attached to a tool shaft (14) of the power tool (2) in order to hold and secure the polishing or sanding member (24) in respect to the tool shaft (14).

A clamping device for axially clamping a disk-shaped tool on a flange of a spindle of a machine tool, includes a clamping disk which rests against the tool in a friction-fitting manner in the clamped state, a screw which is screwed into a threaded receiving opening in an end face of the spindle, an operating element which is connected to the screw in a rotationally fixed manner, and a first securing element which interacts with a corresponding second securing element provided on a flange such that when the screw is at least partly introduced into the receiving opening, the clamping disk is rotationally secured to the flange in a form-fitting manner, where the clamping disk can be rotated relative to the screw and the operating element. The first securing element can be rotated relative to the screw and is mounted in a rotationally fixed manner relative to the clamping disk.

A quick clamping device for a portable machine tool, in particular an angle grinder, includes at least one output shaft, at least one clamping unit, at least one operating unit, and at least one securing unit. The clamping unit, for the purpose of fixing an insert bit to the output shaft without using tools, includes at least one clamping element for applying a clamping force to the bit in a clamping position. The operating unit moves the clamping element into the clamping position and/or into a release position in which the insert bit can be removed from the clamping unit and/or the output shaft. The securing unit is designed to prevent movement of the clamping element from the clamping position into the release position at least under the action of a force decoupled from the operating unit and acting on the clamping element in the direction of the release position.

The present invention relates to a floor treatment apparatus (1) and method for treating a floor. The apparatus comprises: •—a housing (10) comprising a top plate (11), and •—a drive system comprising: •—a transmission (21) arranged above the top plate (11), the transmission (21) comprising a transmission shaft (22) passing through an aperture in the top plate (11), •—a motor (23) attached to the transmission (21), the motor (23) arranged above the top plate (11), •—a rotatable drive plate (24) attached to the transmission shaft (22) and positioned below the top plate (11), and •—a coupling member (25) attached to a bottom of the drive plate (24) and arranged to couple a treatment member (26) for treating a floor surface, by engagement on said floor surface, to the drive plate (24), wherein the floor treatment apparatus comprises an open-ended tubular casing extending from a central aperture in the drive plate (24) through the housing (10) to an outlet opening (15) of the housing (10) to which a fluid conduit is connectable, wherein the casing is arranged for a fluid to flow through it.

An abrasive finishing article with an adapter or hub to attach to an appropriate power tool, wherein the hub contains sets of slots to receive ribs positioned on a grinding wheel to permit adjustment of the height of the hub to change the overall height of the grinding wheel and abrasive finishing article.

An accessory for use with an oscillating power tool includes an attachment portion having a first planar member, a second planar member parallel to the first planar member, a central opening defined in one of the first planar member and the second planar member, a keyed sidewall disposed at least partially around the central opening and extending from the first planar member to the second planar member transverse to the first planar member and to the second planar member, and a plurality of equiangularly spaced recesses defined in one of the first planar member and the second planar member, the recesses spaced apart from the keyed sidewall and not in communication with the central opening. A working portion may be couplable to the attachment portion and configured to perform an operation on a workpiece.

The invention relates to a machine tool, in particular a hand held machine tool, which has a tool receiving device that is movable, in particular in an oscillating manner, around an output shaft. The tool receiving device is designed to hold a tool device on the machine tool in such a manner that the output shaft and a tool rotation axis substantially coincide. The tool receiving device has at least one torque transmission region and a holding device. In order to transmit a driving force to the tool device, the torque transmission region has at least two output area regions that are arranged at a distance from said output shaft and each have a multiplicity of surface points. Here, the tangent planes to said surface points are inclined in regard to an axial plane which includes said output shaft. Furthermore, the tangent planes are inclined in regard to a radial plane which extends perpendicularly to the output shaft. In this way, the output torque is transmitted reliably to the tool device by the machine tool via the tool receiving device.