Abstract: A method for protecting a user of a power tool from the effects of a suddenly occurring imbalance, and to a power tool having a disk-shaped tool for carrying out the method. The power tool has at least one acceleration sensor which is configured to detect vibrations which occur during the operation of the power tool. The vibration values determined can be evaluated and compared with specified limit values, wherein the power tool can be switched off if the vibration values exceed a corresponding limit value. By switching off the power tool, which can be achieved in various ways, the power tool affords optimum user protection against the effects of a suddenly occurring imbalance that may occur, for example, in the event of a defective tool of the power tool.

Abstract: A power tool having a first rechargeable battery and a second rechargeable battery as energy sources, wherein the power tool includes a main body and a motor. In particular, the power tool is characterized in that the main body has a first receiving space for receiving the first rechargeable battery, and a second receiving space for receiving the second rechargeable battery, wherein the receiving spaces are arranged in such a way within a housing of the main body that the rechargeable batteries are accessible and replaceable from a rear side of the main body, wherein the receiving spaces for the rechargeable batteries form a lower boundary of the main body of the power tool. The receiving spaces for the rechargeable batteries or the rechargeable batteries themselves are arranged in a lower, rear region of the main body, where they are particularly well protected against falling, moisture or the like.

Abstract: A handle for a power tool, wherein the handle has a switch-on lock and an operating switch. The handle is characterized in that the switch-on lock is configured to prevent contact between a spring element of the operating switch and an electronic switching element in a blocking position of the switch-on lock and to permit same in an operating position of the switch-on lock. In a second aspect, the invention relates to a power tool having a handle. In further aspects, the invention relates to methods for switching on a power tool and for switching off and locking a power tool, wherein contact between the operating switch and an electronic switching element can be prevented in a blocking position and permitted in an operating position.

Abstract: A handle for a power tool, wherein the handle has a safety switch and an operating switch. The handle is characterized in that the safety switch includes a switching region and a front region, wherein the front region is configured to interact with a mating contour of the operating switch such that unintentional switching on of the power tool is prevented. A power tool having a proposed handle is also provided. An improved locking possibility for an operating switch of a power tool can advantageously be provided.

Abstract: A power tool having an air cooling system. A special air guidance system is proposed, the components of the power tool, such as a motor, transmission or electronics of the power tool, can be supplied in a particularly efficient manner with a cooling air flow around them and in this way can be cooled. In this case, the cooling system should, in particular, be independent of any components of the housing of the power tool since the air guidance is advantageously brought about by internal guidance processes, wherein these internal guidance processes preferably take place independently of components of the housing of the power tool. In particular, the housing-independent air cooling of the components of the power tool is achieved by the provision of a fan on a rotor of the motor of the power tool, which is designed, by means of a reduced pressure, to produce a cooling air flow and guide it in a suitable manner through the power tool.

Abstract: A power tool includes a motor, a rotary disk, a belt drive connecting the motor to the rotary disk, and a reduction gear stage between the motor and the belt drive. A power tool with a ratio of an outer diameter of the drive pulley and an outer diameter of the output pulley being 0.75 to 1.33 is also provided as is a method of operating a power tool.

Abstract: 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.

Abstract: A protection device for a power tool is provided. The power tool can be, in particular, a hand-held battery-operated power tool, such as a cut-off grinder. The power tool preferably has main components in a main region, such as a motor, transmission and rechargeable batteries, which are protected effectively from mechanical damage, e.g. when dropped, by the protection device. Moreover, the protection device prevents the transmission of vibrations in the power tool to the user. In a second aspect, the invention relates to a system which comprises a protection device and a power tool.

Abstract: A handheld, hand-guided cutting-off machine (10), which includes a rotating cutting-off wheel, a supporting housing part (36), an output shaft, which is rotatably supported around an output axis (40), a drive motor, a transmission mechanism (19), which connects the drive motor to the output shaft, a flange and a safety guard (24), which covers the cutting-off wheel over a covering area. The cutting-off wheel is rotatably fixedly mounted on the output shaft with the aid of the flange and surrounded by the safety guard (24), which is pivotable around a pivot axis. The safety guard (24), the supporting housing part (36) and the transmission mechanism (19) have maximum distances from the output axis (40) over an outcut angle (?), which are less than or equal to half the flange diameter of the flange.

Abstract: A handheld, hand-guided cutting-off machine, which includes a rotating cutting-off wheel, a supporting housing part (36), an output shaft (20), which is rotatably supported around an output axis (40), a drive motor, a transmission mechanism (19), which connects the drive motor to the output shaft (20), a flange (41) and a safety guard (24), which covers the cutting-off wheel over a covering area (25). The cutting-off wheel is rotatably fixedly mounted on the output shaft (20) with the aid of the flange (41) and surrounded by the safety guard (24). The safety guard (24) is pivotable around a pivot axis, and the pivot axis is displaced by a distance from the output axis (40) of the output shaft (20).

Abstract: A handheld, hand-guided cutting-off machine (10), which includes a rotating cutting-off wheel, a supporting housing part (36), an output shaft, which is rotatably supported around an output axis (40), a drive motor, a transmission mechanism (19), which connects the drive motor to the output shaft, a flange and a safety guard (24), which covers the cutting-off wheel over a covering area. The cutting-off wheel is rotatably fixedly mounted on the output shaft with the aid of the flange and surrounded by the safety guard (24), which is pivotable around a pivot axis. The safety guard (24), the supporting housing part (36) and the transmission mechanism (19) have maximum distances from the output axis (40) over an outcut angle (?), which are less than or equal to half the flange diameter of the flange.

Abstract: A handheld, hand-guided cutting-off machine, which includes a rotating cutting-off wheel, a supporting housing part (36), an output shaft, which is rotatably supported around an output axis (40), a drive motor, a transmission mechanism, which connects the drive motor to the output shaft, a flange (41) and a safety guard (24), which covers the cutting-off wheel over a covering area. The cutting-off wheel is rotatably fixedly mounted on the output shaft with the aid of the flange (41) and surrounded by the safety guard (24). The safety guard (24), the supporting housing part (36) and the transmission mechanism have maximum distances from the output axis (40) over an outcut angle (?), which are smaller than or equal to half the flange diameter (df).

Abstract: A handheld power tool has a switchable gear component actuatable by a selector switch. The gear component moves from a first operating position into a second operating position. The selector switch has a first switching position associated with the first operating position and a second switching position associated with the second operating position, and movable so that intermediate positions are assumed. A traveling coupling between the selector switch and the gear component has a spring exerting force onto the gear component in the first direction. A locking bolt is coupled to the selector switch in a positively driven manner. In the intermediate positions, the locking bolt is moved into a blocking bolt position blocking movement of the gear component out of the first operating position into the second operating position. When the selector switch is in the second switching position, the locking bolt is in a releasing bolt position.

Abstract: A power tool (10) for processing a workpiece (23), including a processing tool (12) that can be rotated in a rotational direction (14) around an axis of rotation (15) by a drive (13), a protective hood (25) that surrounds the processing tool (12), at least partially, and a spraying device (11) with a first spray nozzle (37) and a pump (36) that is connected to the first spray nozzle (37) via a first connection line (38), whereby the pump (36) generates a minimum pressure of 5 bar in the first connection line (38).

Abstract: A hand-guided tool apparatus having a braking device for braking a machining tool is disclosed. The tool includes a rear handle for operating the tool apparatus, a drive device for driving the machining tool about an axis of rotation, a belt brake including a brake drum and a brake belt which is wrapped around the brake drum, and an operating device including a gas switch for activation of the drive device and a safety switch for unlocking the gas switch. The gas switch and the safety switch are disposed on the rear handle. The operating device additionally includes a brake switch, which is separate from the gas switch and from the safety switch, for activating the belt brake, and which is disposed on the rear handle and is connected to the brake belt by a transmission device.

Abstract: An attachment for at least rotary hand-held power tool includes a tool holder (13) for receiving a working tool and extending into the power tool outer housing (12), a coupling section (14, 34) for connection with a drive shaft (2) of the at least rotary hand-held power tool (1), and a ventilation device arranged in the outer housing (12).

Abstract: A device for switching operating modes for an at least partially rotational and percussive hand tool machine having an overload clutch, which is arranged between a hollow driving guide cylinder (3) containing an axially striking impact piston (2) and a rotating, driving crown gear (4) on the guide cylinder (3) and which can be switched into different operating modes using an externally manually switchable, axially displaceable switching member, wherein at least one operating mode is rotationally driven, wherein the axially displaceable switching member engages rotationally form-lockingly into a freely rotational coupling ring (6) of the overload clutch mounted relative to the guide cylinder (3).

Abstract: A device for switching operating modes for an at least partially rotational and percussive hand tool machine having an overload clutch, which is arranged between a hollow driving guide cylinder (3) containing an axially striking impact piston (2) and a rotating, driving crown gear (4) on the guide cylinder (3) and which can be switched into different operating modes using an externally manually switchable, axially displaceable switching member, wherein at least one operating mode is rotationally driven, wherein the axially displaceable switching member engages rotationally form-lockingly into a freely rotational coupling ring (6) of the overload clutch mounted relative to the guide cylinder (3).