The disclosure relates to a tool interface device for an insertion tool for connecting the insertion tool to a tool holder of a machine tool, having at least one connection interface for connecting to a quick-release device of the tool holder, wherein the connection interface has a recess at least partially bounded by a boundary edge of the connection interface, and wherein the connection interface comprises at least one securing element at least partially forming the boundary edge. It is proposed that the connection interface comprises at least one tool mounting coding element spaced apart from the at least one securing element and at least partially forming the boundary edge and provided for interacting with at least one mounting coding element of the tool holder in a state of the connection interface arranged on the tool holder.

A grinding or disc cutting-type hand-held tool including: a casing housing a motor and an output shaft rotated by the motor along an axis of rotation. The output shaft is capable of rotating: a first type of accessory having a threaded central opening; and a second type of accessory having a smooth central opening. The output shaft has: an end portion supporting a first connection element for rigidly connecting the first type of accessory; and an intermediate portion supporting a second connection element for rigidly connecting the second type of accessory.

It is an object of the invention to increase the degree of freedom in designing a power tool. A representative power tool 100 has a spindle 124 that transmits a driving force of a motor 115 to a tool accessory 145, a tool accessory holding member 127 that is configured to be movable in a direction of a spindle rotation axis direction 124a between a holding position for holding the tool accessory 145 and a releasing position for releasing the tool accessory 145, a lock mechanism 130 that locks the tool accessory holding member 127 in the holding position, and a body housing 101. The lock mechanism 130 is disposed between a second end 1241 of the spindle 124 and a wall of the body housing 101 in the spindle rotation axis direction 124a.

A clamping device for fastening a tool disc to a power tool, wherein the clamping device has a screw provided for being screwed into a drive spindle of the power tool in order to fasten the tool disc. The screw is mounted in a coupling module of the clamping device, wherein the coupling module has a first flange and an internal contour, wherein the clamping device gives rise to a form-fitting fastening of the tool disc to the power tool, and wherein the second flange prevents undesired loosening or tightening of the screw. A power tool having a drive spindle, to which a tool disc can be fastened by the proposed clamping device, and to a method for fastening a tool disc to such a power tool.

A belt sander includes: a power unit having a rotating shaft; a rotatable belt casing defining a track groove that is open toward the power unit and that surrounds the rotating shaft, and having a plurality of engaging portions that are arranged around the track groove; an abrasive belt drivable by the rotating shaft; and a positioning unit including a movable positioning member that is adapted for manual operation, and an engaging member that is co-movably connected to the positioning member. The positioning unit is movable between an engaging position, where the engaging member is engaged with a selected one of the engaging portions, and a releasing position, where the engaging member is disengaged from the engaging portions.

A power tool brake mechanism, in particular a portable power tool brake mechanism, includes at least one mechanical brake unit that has at least one brake element mounted rotatably about a rotation axis and at least one actuating unit that has at least one movably mounted actuating element. The actuating unit is configured to activate and/or deactivate the brake unit. The power tool brake mechanism further includes at least one movement converting unit that has at least one movement converting element configured to convert a movement of the actuating element into a movement of a counter-brake element of the brake unit. The movement of the counter-brake element is at least in a direction that is different from a direction extending along the rotation axis of the brake element.

An apparatus may include a grinder blade for flush cutting concrete, the grinder blade comprising: a distal side that defines a flush cutting plane and a proximal side opposite the distal side, and a locking hub receiver section unitarily formed from the grinder blade at a center portion and extending from the grinder blade a proximal direction to receive a locking hub with a plurality of fasteners disposed proximally to the grinder blade to secure the locking hub against the grinder blade.

The invention refers to hand-held power tool (10) comprising a tool housing (12), a motor (24) and a tool shaft (36) having a rotational axis (40) and actuated by the motor (24), and further comprising a working element (38) releasably attachable to the tool shaft (36) from outside the tool housing (12) in an axial direction and, after attachment to the tool shaft (36), held in respect to the tool shaft (36) by means of an axial holding arrangement (80). The axial holding arrangement (80) comprises a first element (36; 38) constituted by one of the working element (38) and the tool shaft (36) and a second element (38; 36) constituted by the other one of the working element (38) and the tool shaft (36), and at least two locking elements (70) assigned to the first element (36; 38) movably in a radial direction between a retracted position and a locking position, at least one recess (66) assigned to the second element (38; 36) for receiving the locking elements (70) when in their locking positions. The locking elements (70) or the second element (38; 36) in and/or around the at least one radial recess (66) comprises a magnetic material and the at least other one of the locking elements (70) and the second element (38; 36) in and/or around the at least one radial recess (66) comprises a magnetic material or a ferromagnetic material. The locking elements (70) are automatically moved into and held in their locking positions and in the at least one radial recess (66) by means of magnetic force after attachment of the working element (38) to the tool shaft (36).

A grinder includes a locking assembly to lock a spindle in a head housing and has outlets with a large opening area for high cooling efficiency. A grinder includes a main housing accommodating a motor and a fan, a spindle, a locking assembly that locks rotation of the spindle, and a head housing including a joint connected to a front of the main housing, and a compartment accommodating the spindle and the locking assembly. The compartment is laterally less wide than the joint. The locking assembly is located at a middle in a lateral direction of the head housing. The joint has, in a portion of a front surface of the joint, a first outlet at least on a right or a left of the compartment to discharge air for cooling the motor generated from rotation of the fan.

A quick clamping device for arranging at least one application tool on a power tool, in particular on an angle grinder, includes at least one output unit for moving the application tool about an output axis of the output unit, and at least one fixing unit having at least one movably mounted fixing element that is mounted, in particular in a non-removable manner, on the output unit, at least for axially fixing the application tool to the output unit. The quick clamping device has at least one securing unit, which has at least one, in particular movably mounted, securing element that is intended to secure the fixing element, which is mounted so as to be movable relative to the output unit at least about the output axis, so as to prevent the fixing element from moving about the output axis.