A positioning device for a machine tool, in particular for a hand-held machine tool having a rotationally driveable output spindle, includes at least one positioning unit which is provided to stop and/or retain at least one output spindle of the machine tool and/or an insert tool arranged on the output spindle of the machine tool in at least one defined position. The positioning unit is provided for stopping and/or retaining the output spindle and/or the insert tool arranged on the output spindle in at least one defined position in an automatic manner, in particular without a user intervention, in particular starting from a working movement of the output spindle and/or of the insert tool arranged on the output spindle.

A power tool that includes a tool body housing, a drive system, a tool head and a connection system. The drive system is housed in the tool body housing. The tool head, which is configured to perform work on a work piece, includes a tool head housing and an input member that is driven by the drive system when the tool head is coupled to the tool body housing. The tool head can be engaged to the tool body housing in at least two pre-defined and distinct orientations. The connection system secures the tool head to the tool body housing in each of the at least two pre-defined and distinct orientations.

A work tool includes a spindle and a clamp shaft. The spindle is supported to be rotatable around a driving axis defining an up-down direction of the work tool. The clamp shaft includes a shaft part and a fixing part. The shaft part extends coaxially with the spindle. The fixing part is coupled to the shaft part on a lower side of the spindle. The clamp shaft is supported to be movable in the up-down direction relative to the spindle. The clamp shaft is configured to be biased upward and to fix the tool accessory to a lower end portion of the spindle by the fixing par. The fixing part is configured to be removable from the shaft part and to be integrally coupled to the shaft part only by moving upward relative to the shaft part.

A rotating apparatus includes a body connected to a power generation part to rotate a member to be rotated and comprises a driving shaft formed at a side thereof and coupled to the power generation part, a disc-shaped seating part formed at another side thereof, multiple fixing protrusions protruding at an uniform interval on an edge portion of an upper surface of the seating part, a boss protruding from the center thereof, and multiple latching protrusions formed on the outer peripheral surface of the boss; a locking part coupled to the upper surface of the seating part to make in contact with the upper surface of the seating part, and a reverse rotation prevention means maintaining a coupling state between the locking part and the body.

A system and devices disclosed include a tool holder apparatus device that has one or more magnets that are configured to magnetically attach to a surface of the rotating portion of a rotary tool so that when the rotating portion of the rotary tool rotates, the apparatus also rotates. The tool holder apparatus may incorporate a variety of tools such as a laser alignment system, a work surface illumination system, and sanding, grinding and polishing surfaces.

A tool device for a hand-held power tool, which can be operated such that the tool device is rotated about an output shaft of a tool-holding device, has at least one connecting device, which is detachably connected to an output shaft of the power tool. The connecting device is fastened to the tool-holding device so that a drive axis of the output shaft and a tool axis of rotation substantially coincide. The connecting device has a cut-out and at least one clamping wing, which at least partly bounds the cut-out in the radial direction of the tool axis of rotation and which is bounded substantially in the direction radial to the tool axis of rotation by a first bounding edge, which lies on a first bounding circle around the tool axis of rotation. The clamping wing extends at least substantially along a plane orthogonal to the tool axis of rotation.

The invention relates to a tool holder with a tool holding fixture, in particular a clamping chuck such as a contracting chuck, a draw-in collect chuck, a hydraulic expanding chuck and a high-precision chuck, and a shank of a tool, in particular a rotary tool, accommodated in it, wherein the tool holder contains a means for preventing the tool from being pulled out, locking it against axial displacement. This pull-out preventing unit comprises at least one locking element and at least one locking groove, which corresponds to the said locking element, receives it and interacts with it in a positively locking manner. In this case, both the locking element and the locking groove are formed at least partly in the manner of a ball head. Preferably, the tool has the locking grooves. On account of preferably spirally arranged locking grooves along the cylindrical shank of rotary tools, the direction of pitch of which grooves corresponds to the direction of the grooves of the tool, axial locking of the tool is obtained, so that the tool cannot be axially displaced from the tool holder during operation. In addition, force-exerting elements are arranged, with the effect of making the tool lie against the pull-out preventer without play after shrink-fitting.

A clamp arrangement for securing an accessory to an oscillating power tool can include a clamp assembly including a first clamp member that moves relative to the accessory between a closed position wherein the clamp assembly retains the accessory and an open position wherein the first clamp is offset from the accessory permitting removal of the first accessory from the clamp assembly. The clamp assembly can further comprise a second clamp member having a first portion that opposes the first clamp member and cooperates with the first clamp member to clamp the accessory between the first and second clamp members. An attachment plate can carry the clamp assembly. The attachment plate can have a first mating detail formed thereon that is configured to selectively and removably mate with a complementary second mating detail on the power tool in an assembled position.

An oscillating tool includes a housing, a motor housed in the housing and a clamp assembly operatively driven by the motor in an oscillating motion. The clamp assembly can hold an accessory such as a blade or sanding attachment, and the clamp assembly includes a first clamp and a second clamp. The oscillating tool also includes a clamp lever and an actuating lever. The clamp lever is operatively coupled to the first clamp to move the first clamp such that clamp assembly is moved from a closed position to an open position. The actuating lever is operatively coupled to the clamp lever to effect movement of the clamp lever, movement of the clamp lever causing the clamp assembly to move from the closed position to the open position.

An apparatus for cutting and driving a shaft which extends from a hub, the apparatus incorporating a hub adapter fitted to receive the hub; a plurality of set screws mounted upon the hub adapter for clamping the adapter upon the hub; a half of a releasable fastener attached to the hub; a pair of adapters which are fitted for alternatively receiving the hub adapter; a pair of second halves of the releasable fastener which are adapted for alternatively completing the releasable fastener, wherein each of the second halves of the releasable fastener is connected to one of the adapters among the pair of adapters; a pivoting rotary saw connected to one of the adapters among the pair of adapters; and a shaft driver tool connected to the other of the adapters among the pair of adapters.