A pilot drill includes a shaft defining a detent cavity extending from an outer surface of the shaft towards a longitudinal axis of the shaft, the shaft comprising a cutting edge positioned proximate to the outer surface, the shaft configured to rotate about the longitudinal axis during use; and a detent including: a bar positioned at least partly within the detent cavity, the bar including a base and an ear and defining an opening extending from the first side to the second side proximate to the leading end; a fastener extending through the fastener bore of the shaft and the opening of the bar and defining a pivot axis, the bar configured to rotate about the pivot axis from a disengaged position to an engaged position, the ear of the bar extending past the outer surface of the shaft when the bar is in the engaged position.

A pilot drill includes a shaft defining a detent cavity extending from an outer surface of the shaft towards a longitudinal axis of the shaft, the shaft comprising a cutting edge positioned proximate to the outer surface, the shaft configured to rotate about the longitudinal axis during use; and a detent including: a bar positioned at least partly within the detent cavity, the bar including a base and an ear and defining an opening extending from the first side to the second side proximate to the leading end; a fastener extending through the fastener bore of the shaft and the opening of the bar and defining a pivot axis, the bar configured to rotate about the pivot axis from a disengaged position to an engaged position, the ear of the bar extending past the outer surface of the shaft when the bar is in the engaged position.

A lockable socket insert and insert lock comprises: a lockable socket insert comprising an insert axis, a cylindrical tool body comprising an free end, a shaft end, and a tool bore extending inwardly from the free end, and a cylindrical key shaft attached to the shaft end comprising a length, a shaft surface, and a plurality of circumferentially spaced key members disposed along the length and protruding radially outwardly away from the shaft surface, the cylindrical tool body, tool bore, and cylindrical key shaft concentric about the insert axis; and a cylindrical insert lock comprising an outer end configured for disposition toward the fastener pocket, a drive pocket end configured for disposition toward the drive pocket, an outer surface, and a keyway opening.

A pilot drill includes a shaft defining a detent cavity extending from an outer surface of the shaft towards a longitudinal axis of the shaft, the shaft comprising a cutting edge positioned proximate to the outer surface, the shaft configured to rotate about the longitudinal axis during use; and a detent including: a bar positioned at least partly within the detent cavity, the bar including a base and an ear and defining an opening extending from the first side to the second side proximate to the leading end; a fastener extending through the fastener bore of the shaft and the opening of the bar and defining a pivot axis, the bar configured to rotate about the pivot axis from a disengaged position to an engaged position, the ear of the bar extending past the outer surface of the shaft when the bar is in the engaged position.

A pilot drill includes a shaft defining a detent cavity extending from an outer surface of the shaft towards a longitudinal axis of the shaft, the shaft comprising a cutting edge positioned proximate to the outer surface, the shaft configured to rotate about the longitudinal axis during use; and a detent including: a bar positioned at least partly within the detent cavity, the bar including a base and an ear and defining an opening extending from the first side to the second side proximate to the leading end; a fastener extending through the fastener bore of the shaft and the opening of the bar and defining a pivot axis, the bar configured to rotate about the pivot axis from a disengaged position to an engaged position, the ear of the bar extending past the outer surface of the shaft when the bar is in the engaged position.

A tool coupling includes a first member, having a male coupling portion extending along a first axis, and a second member, having a female coupling portion extending along a second axis. The male coupling portion has front and rear drive members defining male front and rear footprints in respective first and second transverse mating planes. The female coupling portion has front and rear drive passages defining front and rear peripheral profiles in respective first and second transverse passage planes. The front and rear drive members respectively occupy the front and rear drive passages, and at least one of the front and rear drive members prevents rotation of the second member about the second axis. On imaginary rotation of the front peripheral profile by any angle about the second axis and axial projection thereof, the front peripheral profile overlaps (i.e., at least partially crosses) the rear footprint.

The invention relates to a threaded insert for securing a tool provided with a securing thread in a tool receiving area. The threaded insert contains a receiving opening with an inner thread for screwing in the tool at the front end face. According to the invention, the threaded insert has a plug-in region which tapers towards the rear end face and which comprises an outer support surface, and at least one depression for receiving an adhesive is arranged on the outer contact surface. The invention additionally relates to a receiving element for such a threaded insert and to a tool receiving area comprising such a threaded insert and a corresponding receiving element.

A rotating tool includes a circumferential surface formed with a tool anchorage arrangement. The tool anchorage arrangement follows a stepped path. The tool anchorage arrangement includes an entry recess and, subsequent thereto, a radial recess and, subsequent thereto, an axial recess. Additional radial and axial recesses may be alternated to increase the number of steps, thereby extending the length of the stepped path.

A rotating tool includes a circumferential surface formed with a tool anchorage arrangement. The tool anchorage arrangement follows a stepped path. The tool anchorage arrangement includes an entry recess and, subsequent thereto, a radial recess and, subsequent thereto, an axial recess. Additional radial and axial recesses may be alternated to increase the number of steps, thereby extending the length of the stepped path.

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.