A device for transmitting a torque produced by a drill to a drill bit includes a shank and a tool fitting. The shank has a first outer conical region, a groove region, and a second outer conical region and has longitudinal grooves. The tool fitting has a basic body which has a rotary driving region with outer rotary driving grooves, an intermediate element which has an inner driver region with inner rotary drivers and an outer driver region with outer rotary drivers, and a locking device. In the connected state, the inner rotary drivers engage in the longitudinal grooves and the outer rotary drivers engage in the outer rotary driving grooves. Lower rotary drivers are arranged on the base surface of the intermediate element where the lower rotary drivers, in the connected state, interact with lower rotary driving grooves in the rotary driving region of the basic body.

A device for transmitting a torque produced by a drill to a drill bit includes a shank and a tool fitting. The shank has a first outer conical region, a groove portion, and a second outer conical region and has first longitudinal grooves and second longitudinal grooves. The tool fitting has a basic body which has first outer rotary driving grooves, an intermediate element which has first inner rotary drivers, second inner rotary drivers, and first outer rotary drivers, and a locking device. In a connected state of the device, the first inner rotary drivers engage in the first longitudinal grooves, the second inner rotary drivers engage in the second longitudinal grooves, and the first outer rotary drivers engage in the first outer rotary driving grooves. The intermediate element has second outer rotary drivers which, in the connected state, engage in second outer rotary driving grooves of the basic body.

The invention relates to a tool part adapted to be connected to a tool counterpart, wherein the tool part comprises a centering portion and an axial stop, and wherein the tool part comprises a plug-rotation portion adapted to cooperate with a plug-rotation counterpart portion of the tool counterpart to connect the tool part to the tool counterpart.

A deburring mechanism with a rotatable countersink, a cylindrical shaft, a conical cutting contour and a cylindrical cutting edge configured to mount to a driven workstation shaft so that when a workpiece comes in contact with the cutting edge, burrs are removed from the workpiece. The deburring mechanism has a safety device attached to the shaft and adjacent the countersink. The safety device has a rotationally symmetric body with openings through which removed burrs move, a circular outer guard, a mounting portion with legs and a hexagonal mounting contour corresponding with an interior bore of the driven shaft and configured such that a driving connection of the countersink only occurs when the safety device is assembled and overlaps the transition area with a protective contour.

A setting device for a self-drilling anchor bolt of the present invention includes: a drive shaft, one end thereof having a shank for connecting to an impact tool, and another end being a setting part for pushing the self-drilling anchor bolt axially; a coupling, partially surrounding the drive shaft along an axis, and being supported on the drive shaft in such a way as to be incapable of relative rotation while being axially moveable at least locally; and a releasable locking component, disposed between the drive shaft and the coupling; in a locked position, the locking component is coupled to an extremity of an anchor rod such that the anchor rod is fed axially with rotational striking into a receiving material, and in a released position, the drive shaft strikes a sleeve to advance axially along the anchor rod and expand at an expansion part.

A cutting tool assembly includes a first tool part and a second tool part. The first tool part has a forward end portion including a cutting edge and a rearward end portion having a conical section and an engagement section. The second tool part includes a conical recess and a clamping device rearwards the conical recess. The clamping device is provided in a transversal cavity of the second tool part and has a first clamp block, a second clamp block and a differential screw engaging the first and second clamp blocks. The first and second clamp blocks engage the engagement section of the first tool part to pull the first tool part into the conical recess when the first and second clamp blocks are moved towards each other by the differential screw protruding rearwards from the first and second clamp blocks.

A flexible bit holder may include a drive body having a receiving orifice formed therein, a drive body having a shank and a flexion assembly. The receiving orifice may be configured to receive a bit, and the shank may be configured to interface with a driver to receive rotational energy from the driver. The flexion assembly may be disposed between at least a portion of the drive body and the driven body to operably couple the drive body and driven body. The flexion assembly may be configured to transfer torque applied to the driven body by the driver to the drive body. The flexion assembly may be formed of flexible material such that the drive body is rotatable relative to the driven body about a common axis of the drive body and the driven body.

A tap holder having a simple structure and high runout accuracy is provided. A tap holder includes: a body having a collet holder hole having an opening toward distal end; a tap collet received in the collet holder hole, the tap collet having a tap mounting hole located at a distal end portion, and a sleeve hole located at a basal end portion; a torque transmission mechanism that transmits rotation of the body to the tap collet; a first elastic body disposed between the body and the tap collet to urge the tap collet toward distal end; a sleeve disposed to the body by received in the sleeve hole to prevent the tap collet from slipping off toward distal end; and a second elastic body disposed between the sleeve and the tap collet to urge the tap collet toward basal end.

The invention relates to a device with a spindle (10) for a machine tool, with a tool holder (30) and a driver ring (20) that is rotationally fixed on the spindle (10) and can be displaced along a rotational axis of the spindle (10). The spindle (10) and the tool holder (30) comprise matching faces which are designed to form a frictionally engaged connection when assembled. The opposing faces of the tool holder (30) and of the driver ring (20) have matching contours (21, 33) so that the driver ring (20) can engage on the tool holder (30).

A device for transmitting a torque produced by a drill includes a shank having a first outer conical region, a groove region, a second outer conical region, and a plurality of first longitudinal grooves extending over the first outer conical region, the groove region, and the second outer conical region and having a plurality of second longitudinal grooves extending over the second outer conical region. A tool fitting has a rotary driving part. The rotary driving part has an inner conical region and an inner driver region where the inner driver region has a plurality of first inner rotary drivers with a first width and first depth and a plurality of second inner rotary drivers with a second width and second depth. The first depth and the second depth are identical and the second longitudinal grooves also extend over the first outer conical region and the groove region.