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.

A device for transmitting a torque from 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 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 has a locking device. In the connected state, 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.

A surgical cutting tool includes an elongated shaft and a cutting head. The shaft defines a coupling portion terminating at a proximal end of the shaft, a stem portion, and a distal portion. The stem portion defines a central axis. The coupling portion optionally defines a deflection surface positioned oblique with respect to the central axis and connected with a first driven surface and a second driven surface. Upon insertion into a drive chuck, the deflection surface promotes self-alignment of the cutting tool and the drive chuck.

The holder for a head replacement-type cutting tool is provided with a holder main body and a tubular coupling member 3 which is housed in an attachment hole formed on the holder main body and made of a metal material lower in hardness than the holder main body. A recessed part is formed on an inner circumferential face of the attachment hole, the coupling member is engaged with the recessed part by firmly attaching the outer circumferential face thereof on the inner circumferential face of the attachment hole, and the coupling member is provided with an attachment screw part which is screwed into a head-side screw part formed at the replacement-type cutting head.

The invention relates to a machine tool, in particular a hand held machine tool, which has a tool receiving device that is movable, in particular in an oscillating manner, around an output shaft. The tool receiving device is designed to hold a tool device on the machine tool in such a manner that the output shaft and a tool rotation axis substantially coincide. The tool receiving device has at least one torque transmission region and a holding device. In order to transmit a driving force to the tool device, the torque transmission region has at least two output area regions that are arranged at a distance from said output shaft and each have a multiplicity of surface points. Here, the tangent planes to said surface points are inclined in regard to an axial plane which includes said output shaft. Furthermore, the tangent planes are inclined in regard to a radial plane which extends perpendicularly to the output shaft. In this way, the output torque is transmitted reliably to the tool device by the machine tool via the tool receiving device.

An adaptor assembly for coupling a cutting tool to a drill drive chuck such that driven rotation of the drive chuck is transferred to the cutting tool by the adaptor assembly. The adaptor assembly includes a rod, a collet and an enclosure. A proximal region of the rod provides an adaptor male coupling portion configured to engage a drill drive chuck. A leading of the collet provides an adaptor female coupling portion configured to engage a surgical cutting tool tang. Further, the rod and the collet form complementary engagement features for coupling to one another. The enclosure rotatably maintains the collet. Upon final assembly of the rod to the collet, rotation of the rod is transferred to the collet. During use, the adaptor assembly can facilitate coupling of a cutting tool to a powered handpiece under circumstances where the cutting tool is otherwise incompatible with the powered handpiece.

A surgical cutting tool includes an elongated shaft and a cutting head. The shaft defines a coupling portion terminating at a proximal end of the shaft, a stem portion, and a distal portion. The stem portion defines a central axis. The coupling portion optionally defines a deflection surface positioned oblique with respect to the central axis and connected with a first driven surface and a second driven surface. Upon insertion into a drive chuck, the deflection surface promotes self-alignment of the cutting tool and the drive chuck.

The invention relates to a machine tool, in particular a hand held machine tool, which has a tool receiving device that is movable, in particular in an oscillating manner, around an output shaft (2). The tool receiving device is designed to hold a tool device on the machine tool in such a manner that the output shaft and a tool rotation axis substantially coincide. The tool receiving device has at least one torque transmission region (9) and a holding device (4a, 4b). In order to transmit a driving force to the tool device, the torque transmission region has at least two output area regions (9a) that are arranged at a distance from said output shaft and each have a multiplicity of surface points. Here, the tangent planes to said surface points are inclined in regard to an axial plane which includes said output shaft. Furthermore, the tangent planes are inclined in regard to a radial plane which extends perpendicularly to the output shaft. In this way, the output torque is transmitted reliably to the tool device by the machine tool via the tool receiving device.

A system for securing different first and second drill tools to a drill head including a socket is provided. The system includes a chuck adapted for positioning at least partially within the socket of the drill head, the chuck including a first opening for receiving the first drill tool. An adapter is configured for forming a selective locking engagement within the first opening of the chuck, the adapter including a second opening for receiving the second drill tool. The selective locking engagement may comprise a twist lock engagement, and the adapter may be arranged for receiving a roof bolt. Related methods are also disclosed.

A cutting head for a cutting tool includes a cutting portion and a shank portion. The cutting portion has a plurality of integrally formed cutting edges and the shank portion has a first end adjacent the cutting portion and a second end. The first portion of the shank portion is closer to the first end of the shank portion than the second and third portions of the shank portion and the third portion of the shank portion is disposed closer to the second end of the shank portion than the first and second portions. The first portion of the shank portion has an exterior surface including at least one axially extending recess extending from an end of the first portion closest to the second portion toward the first end of the shank portion. The cutting head is formed of a pressed and sintered cemented carbide material.