An electric power tool having a rotating tool. The electric tool is characterized in that a direction of rotation of the tool on the electric power tool can be set in dependence on an operating state of the electric power tool. The automatic settability of the direction of rotation of the electric tool is associated with the advantage that no gearbox for changing the direction of rotation, as in an internal combustion engine, is required. In addition, the user-friendliness of the electric power tool for the user can be significantly improved, since the user practically no longer has to worry about setting a “correct” direction of rotation of the tool. In a further aspect, the invention relates to a method for operating an electric power tool having a rotating tool, wherein the direction of rotation of the tool on the electric power tool is set in particular in dependence on whether or not a suction device is connected to the electric power tool.

A portable machining apparatus facilitates addition of new electric components with an intended arrangement of various electric components. The portable machining apparatus includes a housing, an electric motor installed in the housing and including a motor shaft extending in an axial direction, a tip tool partially or fully exposed outside the housing and rotatable by the electric motor, a controller installed in the housing and aligned with the electric motor in the axial direction to control an operation of the electric motor, and a first electric component and a second electric component installed in an electric component compartment between the controller and the electric motor. The first electric component and the second electric component are aligned in a same plane perpendicular to an axis of the motor shaft.

An angle grinder (200), which includes a gear neck (210) for connecting a dust hood (100, 100′) equipped with a flange (90), the angle grinder (200) including a sensor unit (20), with the aid of which it is possible to detect which type of dust hood (100, 100′) is connected to the angle grinder (200), the angle grinder (200) also including rotational direction control electronics (230), which are connected by signals to the sensor unit (20) in such a way that the rotational direction (GGD, GLD) of a cutting wheel (220) of the angle grinder (200) is predefined as a function of the dust hood type detected by the sensor unit (20).

Handheld cutoff grinder including a cutting disk (11), a motor housing having a drive unit and a cantilever (16) with a support arm (17) and an arm cover (18). A stop element (41) is provided in the arm cover (18) for the spindle (12), the stop element limiting the movement of the spindle (12) in a plane (48) perpendicular to the axis of rotation (13) during operation.

Handheld cutoff grinder including a cutting disk (11), a motor housing having a drive unit and a cantilever (16) with a support arm (17) and an arm cover (18). A stop element (41) is provided in the arm cover (18) for the spindle (12), the stop element limiting the movement of the spindle (12) in a plane (48) perpendicular to the axis of rotation (13) during operation.

An abrasive cutter for cutting a rail of a track includes a drive for driving a cutting disc holder in rotation. A cutting disc is attached to the cutting disc holder with at least one clamping element. The drive is directly coupled to the cutting disc holder and has a maximum transverse extent which is at most equal to a diameter of at least one clamping element. The drive has an electric drive motor with a power density P.sub.Spez≥0.5 kW/kg. The abrasive cutter allows a reliable, efficient, user-friendly and low-maintenance through-cutting of a rail of a track.

An abrasive cutter for cutting a rail of a track includes a drive for driving a cutting disc holder in rotation. A cutting disc is attached to the cutting disc holder with at least one clamping element. The drive is directly coupled to the cutting disc holder and has a maximum transverse extent which is at most equal to a diameter of at least one clamping element. The drive has an electric drive motor with a power density P.sub.Spez≥0.5 kW/kg. The abrasive cutter allows a reliable, efficient, user-friendly and low-maintenance through-cutting of a rail of a track.

Several means 71, 72, 73, 74, and 75 are provided for restricting a relative displacement in a separating direction of half-split housings 50L, 50R. At one or more of several screw-connection parts 60 of the left and right half-split housings 50L, 50R, a press-fitting protrusion 71a is provided in an insertion hole 62a of a boss-receiving part 62 into which a screw-boss part 61 is inserted. By press-fitting the screw-boss part 61 to the boss-receiving part 62, a separation resistance may be introduced between the left and right half-split housings 50L, 50R.

A power tool has a driving shaft for driving a working element and a clamping device for clamping the working element. The clamping device has a clamping position in which the working element may be fixed relative to the driving shaft and a release position in which the working element can be removed from the driving shaft. An operating member is coupled to the clamping device for moving the clamping device between positions. The clamping device also has a rotating position in which the working element can be rotated by an angle relative to the driving shaft and the operating member has an operating position that corresponds to the rotating position.

A power tool has a driving shaft for driving a working element and a clamping device for clamping the working element. The clamping device has a clamping position in which the working element may be fixed relative to the driving shaft and a release position in which the working element can be removed from the driving shaft. An operating member is coupled to the clamping device for moving the clamping device between positions. The clamping device also has a rotating position in which the working element can be rotated by an angle relative to the driving shaft and the operating member has an operating position that corresponds to the rotating position.