A rotary tool comprising two coupling parts, namely a carrier and a cutting head in a front end surface. The carrier comprises a pin receptacle into which a coupling pin of the cutting head is inserted. In order to prevent pulling-out in an axial direction, stop surfaces are provided on the pin receptacle and on the coupling pin, said stop surfaces being effective in an axial direction. For a design that is as simple as possible, in particular with regard to grinding, each stop surface of the coupling pin is adjoined by a lateral surface which freely tapers off in the direction toward the end surface as viewed in the axial direction. In particular, the lateral surface constitutes a torque surface.

A drill bit is disclosed. The drill bit has a cutting portion having an annular portion, where the annular portion has a first end on which is disposed a cutting element and a second end that includes an outer insertion element and a stop shoulder. The drill bit has a drill shaft portion having a cylindrical drill shaft, where the drill shaft has an inner insertion element with an end face on a side of the drill shaft facing the cutting portion. The outer insertion element and the inner insertion element together form a plug connection in an insertion direction that is parallel to the axis of rotation and the insertion elements are connectable to each other via a pin element that is movable into a slot-shaped recess. The pin element is attached to an outside of the inner insertion element and the outer insertion element has the slot-shaped recess.

A drill bit, which is rotatable in a direction of rotation about an axis of rotation, is disclosed. The drill bit has a cutting portion with an annular portion where the annular portion has a first end on which is a cutting element and has at a second end a first insertion element. The drill bit has a drill shaft portion with a cylindrical drill shaft which has at an end, towards the cutting portion, a second insertion element. In a direction of insertion parallel to the axis of rotation, the insertion elements form a plug-in connection and can be additionally connected by way of at least one pin element which is movable in at least one slit-shaped clearance.

A handheld core drilling device includes a tool receptacle where the tool receptacle has a receiving sleeve and a tool receiving piece disposed in the receiving sleeve. A compression spring arrangement is disposed within the receiving sleeve. Exactly three equally spaced retaining tabs are formed on the receiving sleeve along a circumferential direction and each retaining tab has a respective stop surface that faces the tool receiving piece. Exactly three equally spaced bearing surfaces are formed on the tool receiving piece along a circumference of the tool receiving piece and each bearing surface faces a respective stop surface. Each of the bearing surfaces includes a stud with a stud surface where the stud surfaces in a radial direction are at most half as wide as the bearing surfaces in the radial direction.

A tool system including a liner having a body and a plurality of coupling members extending from the body, the body includes a first aperture through which at least part of a tool extends and is configured for coupling to a tool fixture, and a housing having an second aperture through which the at least part of the tool extends, a first end of the housing having grooves configured to mate with the plurality of coupling members to couple the tool within the grooves and to the tool fixture.

A coupling is described for connecting an interchangeable tool head to a machine part of a pressing device. The machine part features a receptacle region (A) for accommodating a shaft section of an interchangeable tool head, which can be axially displaced in the receptacle region (A), and the shaft section comprises an end face (S) and at least two engaging elements. The at least two holding elements are arranged in the receptacle region (A) and a guide groove is respectively formed between two adjacent holding elements. Also described are tools such as pressing devices utilizing the couplings and related methods.

A quick release mechanism includes a male member including a locking pin, a female member including a cavity for receiving the male member, a locking joint on the female member including a longitudinal bore for receiving the male member, a longitudinal slit for receiving the locking pin, and a locking recess for capturing the locking pin, a spring within the cavity for securing the locking pin within the locking recess, and a bearing enabling rotation of the male member within the cavity. The male member engages the female member by guiding the locking pin into the slit and compressing the spring until the locking pin is released from the slit into the cavity. The locking pin is then able to shift into the locking recess by rotating the male member. The spring exerts a force onto the male member to maintain the locking pin within the locking recess.

A cutting portion, which is rotatable in a direction of rotation about an axis of rotation, is disclosed. The cutting portion has an annular portion, one or more cutting elements which are disposed on a first end of the annular portion, and an insertion element which is disposed on the annular portion at an end that is remote from the cutting elements. The insertion element has at least one slit-shaped clearance with a cross-slit and a connecting slit, where the cross-slit is arranged perpendicularly in relation to the axis of rotation and is connected by way of the connecting slit to an upper edge of the insertion element.

A drill bit rotatable about a rotation axis is disclosed. The drill bit has a first drill bit portion configured as a cutting portion and has an annular portion connected at one end to one or more cutting elements and, at another end, a first connection device. The drill bit has a second drill bit portion configured as a drilling shank portion and has a cylindrical drill shaft, which on one end has a second connection device. The first and second connection devices in a connected state form a detachable connection, and a force transmission and torque transmission occur from the drill shaft portion to the cutting portion. The cutting portion has a third connection device, and the drill shaft portion has a fourth connection device. The third and fourth connection devices in a connected state form in an axial direction parallel to the axis a form-fitting connection.

The coupling part, in particular cutting head for a drilling tool for the interchangeable fastening in a coupling receptacle, has a coupling pin which is enclosed by a head support surface, wherein the coupling pin has a plurality of types of functional surfaces, namely stop surfaces for transmitting a torque between the cutting head and the carrier, and clamping surfaces for centering and clamping the cutting head in the coupling receptacle. The coupling pin has an axially front pin region and an adjoining, axially rear pin region, and the clamping surfaces and the stop surfaces are arranged in different pin regions. This decoupling and distribution of the functional surfaces to the various pin regions permits simpler production of the coupling pin and an overall more robust configuration.