A mud mixer comprises a housing defining a battery mounting portion, an electric motor supported by the housing, a mixing element that selectively receives torque from the motor, causing the mixing element to rotate about a rotation axis, and a battery pack removably coupled to the battery mounting portion for providing power to the electric motor when coupled to the battery mounting portion. When the battery pack is coupled to the battery mounting portion, the rotation axis intersects the battery pack.

A clamping unit for a chuck of a machine tool spindle contains a threaded shaft for adjusting the clamping jaws of the chuck. The threaded shaft is axially adjustable in the clamping unit by means of a threaded nut connected to a rotor of a servomotor actuator. An electrically actuable, releasable clutch has a first clutch element, which is connected in a rotationally secure and axially displaceable manner to the threaded shaft, and a second clutch element, which cooperates with the first clutch element and is connected in a rotationally secure manner to the rotor. When the clutch is activated, the threaded shaft and the threaded nut are mutually connected in a rotationally secure manner and prevent axial displacement of the threaded shaft.

Disclosed are devices and methods for creating a bore in bone. The devices and methods described involve controlling the drive and measuring the drilling energy of a working tool such that a user can avoid injuries to surrounding structures.

Disclosed are devices and methods for creating a bore in bone. The devices and methods described involve controlling the drive and measuring the work of a working tool such that a user can avoid injuries to surrounding structures.

A tool exchange device in which a tool unit is detachably attached, the tool exchange device includes: a device body in which a motor accommodation chamber for accommodating an electric motor is formed; a cylindrical member provided in the device body and to which a plurality of balls engaged with an engagement ring provided in the tool unit are attached; a cam member attached inside the cylindrical member and rotated and driven by the electric motor arranged in the motor accommodation chamber; and a ball drive surface provided on the cam member and having a lock surface for engaging the ball with the engagement ring and a release surface for releasing the ball from the engagement ring.

A mud mixer includes a tool body, and an electric motor supported by the tool body that is configured to rotate a mixing element about a rotation axis. The mud mixer further includes a first handle fixedly coupled to the tool body and extending from the tool body along a handle axis, a plane angled relative to the rotation axis and defined as an extension of the handle axis, and a second handle rotatably coupled to the tool body about the rotation axis and extending from the tool body in a direction parallel to the plane.

The invention relates to a portable drilling and/or boring machine, for workpieces (8), in particular workpieces that make up aeroplane structures, such as airframes, wings, cabin, the machine comprising: a jig bushing (3) for guiding a machining tool; an expansible clip (4) for blocking the jig bushing in an opening of a screen (5) positioned on and secured to the workpiece, said screen constituting a drilling jig; and a means for moving the expansible clip (4) in order to clamp and unclamp the jig bushing and secure the machine relative to the screen; the means for moving the expansible clip (4) relative to the jig bushing (3) includes an electric motor (1) the torque and position of which are controlled.

A tool post including a body extending according to an axis A-A, the latter including, at one of its ends, a base for fastening to a numerically-controlled machine tool and, at the other end, a head movable in rotation, the head including at least two tool-holder spindles, each being intended to receive a cutting tool in engagement, the spindles occupying, depending on the angular position of the head, a working position in which they are intended to carry out a machining operation on a workpiece held in position in a fitting or a standby position in which they are withdrawn from the workpiece, each of the spindles being configured to be controlled independently of the other in order to immobilise or drive in rotation the cutting tool carried thereby, irrespective of the position it occupies.

A magnetic drill is provided with an alternate power source. The drill is comprises of: an electric motor for driving a tool; a controller configured to receive an AC input signal and operable to control a drive signal to the electric motor; an electromagnet arranged in a base of the drill housing and operable, in response to a DC voltage, to magnetically couple the base to a surface proximate to the base; an AC/DC converter configured to receive the AC input signal and operates, independent from the controller and in the presence of the AC input signal, to output a DC voltage to the electromagnet; and an alternate power source circuit that monitors the DC voltage output by the converter and, in the absence thereof, provides an alternate DC voltage to the electromagnet.

A double eccentric positioning apparatus uses two equal offset eccentric bushings to accurately position a tool (such as a drill bushing) in two dimensions. Miniature servo motors and precise gearing control the rotation of each eccentric bushing, which controls the direction of the offset vectors. The offset vectors are used to determine the final position of the drill bushing. The desired rotation angles can be mathematically calculated based on desired position. The inner eccentric bushing is located concentric to the offset of the outer eccentric bushing. This allows any position, within a radius of two times the eccentric offset, to be achieved. The use of worm gearing on the eccentric bushings prevents back-driving of the servo motors, due to the lead angle of the worm gears, and the friction between the worm wheel and worm gear.