A method for controlling a machine tool-having an operating switch and a lock switch including: activating the operating switch by exerting a force in a direction onto the operating switch for switching over the machine tool from a deactivation mode to an activation mode, so that the drive is adjusted to a first predetermined rotation speed value; deactivating the operating switch, so that no more force is exerted in direction onto the operating switch, wherein the drive is adjusted in the first predetermined rotation speed value for a predetermined time period; activating the lock switch within the first predetermined time period after deactivation of the operating switch, so that the drive is adjusted to a predetermined second rotation speed value; and activating the operating switch by exerting a force in a direction onto the operating switch or activating the lock switch by exerting a force in a direction onto the lock switch for switching over the machine tool from the activation mode to the deactivation mode.

A grinding machine tool for reducing hotness of a casing, includes a casing and a drive assembly. The casing is divided into a head and a body; includes casing parts; includes an air inlet provided on the body and an air outlet provided on a side of the head; and forms a motor cover on the head, and the motor cover does not contact the casing parts to form an airflow passage in the casing. The drive assembly includes a circuit board, a motor placed into the motor cover, and an airflow generating member rotating synchronously with the motor. When the airflow generating member rotates, it generates a first heat dissipation airflow passing through the airflow passage and dissipating heat of the circuit board and the head, and a second heat dissipation airflow dissipating heat on a side of the motor facing the airflow generating member.

An electric grinding machine tool comprises a grip body, a grinding disc and a battery, the grip body is arranged with a tool shaft connected with the grinding disc, a driving component capable of rotating the tool shaft when receiving power, and a circuit board electrically connected with the driving component and the battery, and the grip body has a battery mount exposed to an outer surface. The board surface of the circuit board is not perpendicular to the tool shaft, the circuit board and the battery mount are respectively positioned on opposite sides of the tool shaft, and a line passes through the circuit board, the battery mount, and the tool shaft. By changing the position of the circuit board, the height of the grip body is reduced, so that the gravity center of the grip body is reduced to improve stability of a grinding operation.

The invention relates to a guiding device 100, a system comprising a guiding device and a tool 111 for surface treatment, a method for surface treatment with the guiding device 100 and a method for retrofitting a tool 111 with the guiding device 100. The guiding device 100 comprises at least one guide element 101, one angle device 102 and one connection arrangement 130 for connecting the guiding device to the tool 111. Furthermore, a predetermined angle between the plane 180 of the at least one guide element 101 and a plane of action 110 of the connectable tool 111 is set by means of the angle device 102. The guiding device 100 is furthermore characterised in that it is switchable between at least one flexible operating state and one rigid operating state.

A sanding tool system including a sanding plate with a metal composition having a first layer composed of a corrosive inhibitor and a second layer composed of an abrasive material. The sanding plate also has one or more evacuation ports extending through the metal composition, one or more recesses extending partially into at least the second layer of the metal composition, a retaining lip extending around a perimeter of the metal composition, and a connector attached to the first layer. The system additionally includes a sanding tool removably attached to the sanding plate via the connector.

The invention refers to a battery pack (30) comprising a battery pack housing (32) and a battery cell (34) accommodated inside the battery housing (32) and a plurality of battery pack contacts (36) accessible from outside the battery housing (32) and electrically connected to the battery cell (34). The battery pack (30) is adapted to be electrically connected with its battery pack contacts (36) to respective electric appliance contacts (38) of an electronic appliance (2; 100) and to provide electric energy to the electronic appliance (2; 100) after connection thereto. It is suggested that the battery pack (30) comprises a card slot (40) in the battery pack housing (32) with a plurality of electric slot contacts (42) in electric contact with the battery pack contacts (36), and that the battery pack (30) comprises an electronics card (44) for releasable insertion into the card slot (40), the electronics card (44) comprising a wireless communication device (46).

The disclosure relates to a sanding block for manual use, in particular for manually sanding surfaces, having at least one base plate for holding an abrasive article and at least one sanding block body having a gripping region. According to the disclosure, a rechargeable-battery operated device for removing sanding dust by suction is integrated in the sanding block, said device comprising at least a dust box, a motor housing, in which a drive motor provided with an impeller is provided, and a rechargeable battery for supplying the drive motor with power without an external power supply.

A power tool, such as a grinder, may include: a prime mover such as a motor; a power-transmission mechanism operably connected to the prime mover; a housing that houses the prime mover and the power-transmission mechanism; and a tool-accessory retaining part for holding a tool accessary. The tool-accessory retaining part is operably connected to the power-transmission mechanism. An accessory is mounted on the housing in a detachable manner. A link member moves in response to mounting and demounting of the accessory. A detection sensor is housed in an interior of the housing and includes a non-contact sensor device. The detection sensor is configured to detect movement of the link member using the non-contact sensor device.

A method for controlling a machine tool-having an operating switch and a lock switch including: activating the operating switch by exerting a force in a direction onto the operating switch for switching over the machine tool from a deactivation mode to an activation mode, so that the drive is adjusted to a first predetermined rotation speed value; deactivating the operating switch, so that no more force is exerted in direction onto the operating switch, wherein the drive is adjusted in the first predetermined rotation speed value for a predetermined time period; activating the lock switch within the first predetermined time period after deactivation of the operating switch, so that the drive is adjusted to a predetermined second rotation speed value; and activating the operating switch by exerting a force in a direction onto the operating switch or activating the lock switch by exerting a force in a direction onto the lock switch for switching over the machine tool from the activation mode to the deactivation mode.

An apparatus for forming the hairline on a target material according to the embodiment includes a body including a rotation shaft, an abrasive member, a first bracket for fixing the abrasive member to the rotation shaft, and a guide unit disposed between the body and the rotation shaft along a longitudinal direction of the rotation shaft.