Abstract: A power tool has a base for supporting the power tool on a surface. A frame is supported on the base and includes a track that extends longitudinally along the frame. A fixed gib is attached to one side of the frame and a movable gib is attached to the other side of the frame. The movable gib can move with respect to the frame. A slide is positioned between the fixed gib and the movable gib for longitudinal movement with respect to frame and is constrained from lateral movement by the fixed gib and the movable gib.

Abstract: The invention discloses a tool for grinding and polishing, comprising a drive motor, which has a given machine power (rated input power) and by which a work spindle can be driven about its longitudinal axis in rotatingly oscillating fashion, and further comprising a tool-mounting fixture on the work spindle intended to receive a tool that has a working surface for grinding and polishing operations. The quotient of the working surface (in square millimeters) and the rated power input (in Watts) is at least 35 mm2/W, while the quotient of the working surface and the deadweight (in grams, without the tool) is at least 5.5 mm2/g.

Abstract: The invention discloses a hand-held power tool including a housing with a spindle head. A tool spindle can be driven in rotary oscillation about its longitudinal axis and, at its tool-side end, is configured to carry a tool. The tool spindle has a clamping mechanism, which is configured to move a positioning element between a clamping position, in which a tool that is to be carried can be fixed to the tool spindle, and a release position, in which the tool can be released. The clamping mechanism has an actuating mechanism having an actuating element configured as a slide having an engaging surface for axially moving the positioning element to move the clamping mechanism between the clamping and the release positions when the actuating element is moved.

Abstract: A power-operated hand-held power tool, in particular a power tool comprising an oscillation drive for driving a tool in an oscillating manner, comprising at least one sensor for detecting vibrations and comprising a controller which is coupled to the at least one sensor to control at least one operating parameter of the power tool according to an output signal of the at least one sensor, the power tool being configured to receive different tools, and the controller being configured to evaluate the output signal of the at least one sensor and preferably to compare the output signal with stored characteristic values for the vibrations of different tools so as to control at least one operating parameter of the power tool according to said comparison, is specified.

Abstract: According to the present invention, there is provided a gravity-feed liquid delivery system for a machine tool. A liquid reservoir has an attachment mechanism to attach the reservoir to a structure separate from the machine tool. Coolant contained in the reservoir is transmitted by a hose having a first end combined to the liquid reservoir and a second end attachable to the machine.

Abstract: A power-driven hand tool is disclosed, comprising a tool spindle that can be driven in a rotational oscillatory manner about its longitudinal axis and that is designed to carry a tool, and further comprising a transmission housing, in which there is carried an eccentric coupling drive for driving the tool spindle and from which the tool spindle projects outwardly with one end, wherein, for the purpose of mass compensation of the oscillatory motion of the eccentric coupling drive, a compensatory mass is provided, which is disposed outside of the transmission housing.

Abstract: An electric motor, in particular a motor which can be commutated electronically, is disclosed. The motor comprises a stator with a plurality of field windings which are wound at least in places from a winding wire, and further comprises a contact grid for making contact with the field windings, which contact grid has a plurality of conductor tracks which are insulated from one another, with the conductor tracks having contacts to which the winding wire is fixed, wherein the winding wire is cut through between specific contacts such that this results in the field windings being connected in a manner which is suitable for generating a rotating field when being powered by a suitable motor controller.

Abstract: The invention discloses a drilling machine, in particular a hand-held core drilling machine, having a drive with a motor that can be coupled to a tool spindle in order to drive the latter, wherein the drive allows at least a first transmission stage and a second transmission stage, having a center mount for mounting a pilot drill and having a tool mount for mounting a drill bit, wherein the drill bit and the pilot drill can be mounted substantially concentrically with one another, wherein the pilot drill, in particular in order to drill a pilot hole, can be driven in a first rotational speed range by means of the first transmission stage and wherein the drill bit, in particular in order to drill a core hole, can be driven in a second rotational speed range by means of the second transmission stage.

Abstract: Disclosed is a core drilling machine, comprising a stand part for fixing the core drilling machine to a component, and comprising, on the stand part, a guide along which a core drilling unit is carried in a movable manner, the stand part having a stand housing, on an outside face of which the guide is carried, and the core drilling unit having an elongate machine housing, which is carried so as to be movable along the guide by means of a slide, and comprising a cable, which, together with a protective sleeve, is routed from the stand part to the core drilling unit, the cable being routed from the stand housing to the core drilling unit via a flexible protective sleeve and being carried on the core drilling unit by means of a swivelling rotary joint.

Abstract: The invention discloses a connector rack for an electric motor, in particular for an electronically commutable motor having a plurality of exciter windings for a power tool, having at least one electronic mounting board, on which a plurality of contact carriers is provided for electrically contacting the exciter windings.

Abstract: The invention relates to a The portable tool, in particular a tool for grinding or cutting, having a housing with a gear head, having a drive shaft which can be rotationally driven by a motor and can be coupled via a coupling drive to a tool spindle for the drive thereof, wherein the tool spindle can be driven rotatingly oscillating about the longitudinal axis thereof and is configured for receiving a tool wherein a vibration absorber is provided at the tool spindle, the vibration absorber having an absorption mass which encloses the tool spindle. Preferably the absorption mass is configured substantially in a ring segment shape and encloses the tool spindle by at least 180°, or even by 360°.

Abstract: A driver circuit for driving an electrical load includes an input terminal pole connecting the driver circuit to an AC voltage source, an output terminal pole connecting the driver circuit to the load, a rectifier circuit connected to the input terminal pole for converting an AC voltage into a pulsating DC voltage, and a control element connected to the rectifier circuit and to the output terminal pole. The control element has a switch and a controller, the controller switching the switch on and off by means of a pulse train signal, wherein an electrical output value of the driver circuit is adjustable by switching the switch. The controller is configured to vary at least one time-based value of the pulse train signal within one period of the pulsating DC voltage such that a driver current is adjusted at the output terminal pole having a defined waveform within the period.

Abstract: A device and a method for cutting through the adhesive bead of panes that have been fixed by bonding is specified, said device having a base body on which at least one suction plate for fixing on a pane to be separated out as well as one motor-drivable coil for winding-on a separating wire are accommodated, wherein at least two guide rollers are held on the base body by means of extension arms at a distance which is adjustable in respect to each other. The device is preferably positioned approximately diagonally on the pane in such a manner that the guide rollers are situated on the outer ends of the extension arms in the vicinity of the corner regions of the pane.

Abstract: Disclosed is a grinder, in particular an oscillating grinder, having a grinding spindle, to which a grinding tool can be attached, and having a housing, and having a dust extraction duct which can be attached to the housing by means of a pivot joint and a latching connection.

Abstract: A power screwdriver is disclosed, having a drive for driving a tool spindle having a controller for controlling the drive, having a monitoring device for monitoring the rotation speed or the torque, and having a monitoring device for monitoring a switch-off criterion, which monitoring device is coupled to the controller, in order to switch off the drive when the switch-off criterion is reached, with the controller being programmed such that (a) the drive is first of all accelerated until the rotation speed has reached a specific first rotation speed; (b) if the rotation speed then falls by at least a specific amount within a specific time increment, or the torque rises by at least a specific amount within a specific time increment, the drive is braked until the rotation speed has reached a specific second rotation speed, which is lower than the first rotation speed; (c) the drive is then regulated at the second rotation speed for a specific time; and (d) after step (c), the drive is accelerated again at most

Abstract: A core drilling machine having an axial extending hollow drill shaft supported rotatably in a housing and rotated by means of a drive unit; a coaxial tool holder receiving an axially displaceable drill bit, the tool holder having a locking mechanism securing the drill bit in a rotationally fixed manner to the hollow drill shaft; wherein the hollow drill shaft is suitable for receiving a shaft of an interchangeable centre drill, the center drill axially supported against a first spring element; and an axial stop element preventing in a first position a complete displacement of the center drill into the interior of the hollow drill shaft and allows in a second position a complete displacement of the center drill into the interior of the hollow drill shaft; and an activation device for activating the first or second positions of the stop element.

Abstract: A grinding device is specified, comprising a housing in which a tool spindle for driving a tool is mounted, comprising a protective hood which can be locked on the housing, and comprising means which allow the tool spindle and the protective hood to be locked. An actuating device is provided which is displaceable on the housing between a first position in which the tool spindle is released and the protective hood is locked against rotation and a second position in which the tool spindle is locked against rotation and the protective hood can be adjusted in the angular position thereof on the housing.

Abstract: A tool for parting, in particular for sawing, includes a carrier blade that has a toothing portion with a finite, geometrically determined toothing, and a receiver for fixing the carrier blade to a tool spindle of a power tool. The tool spindle can be driven in oscillation about its longitudinal axis. The toothing is disposed at a distance from the receiver and is configured to be advanced perpendicularly in relation to the longitudinal axis, such that the toothing is realized in a non-uniform manner along the toothing portion. The toothing portion has a middle region and end regions that adjoin the middle region and that are provided with strengthened corner teeth.