A workpiece holding device for holding a workpiece in a heat treatment system while the workpiece undergoes a thermal expansion and/or contraction includes at least two clamping units configured to apply a radial and/or an axial clamping force to the workpiece to hold the workpiece in the workpiece holding device in a predefined position and a drive unit configured to rotate the workpiece in the workpiece holding device. The at least two clamping units may be configured to adjust their position relative to the holding device to maintain the clamping force during the thermal expansion and/or contraction of the workpiece.

A workpiece holding device for holding a workpiece in a heat treatment system while the workpiece undergoes a thermal expansion and/or contraction includes at least two clamping units configured to apply a radial and/or an axial clamping force to the workpiece to hold the workpiece in the workpiece holding device in a predefined position, and at least three support units configured to support the workpiece. At least one of the support units includes a carrier and an exchangeable support element attached to the carrier, the exchangeable support element being configured to contact and rotatably support the workpiece in the predefined position.

In a chuck (1) by means of which workpieces (2) are supported individually and centered for machining by a machine tool, the chuck comprising: a chuck body (3), four clamping jaws (5, 6, 7, 8) which are radially movably mounted on the chuck body (3) and are each arranged in pairs in an X or Y plane, and a drive piston (9) which is mounted in the chuck body (3) so as to be axially movable and which is drivably coupled to the four clamping jaws (5, 6, 7, 8) via a helical surface or helical gearing (10) worked on the drive piston (9) and the respective clamping jaws (5, 6, 7, 8), and feeds these synchronously in the direction of the workpiece (2) to be clamped or moves them away from the latter, a position-accurate, i.e. centered alignment for a large number of differently designed workpieces (2) can be achieved with a high repetition accuracy for subsequent clamping operations. This is achieved in that a rocker (11) is provided between the drive piston (9) and two adjacent clamping jaws (5, 7 or 6, 8), the rocker (11) has a center of symmetry (12) into which a bolt (13) which is pivotably mounted on the drive piston (9) and about which the rocker (11) can be pivoted as a function of the contact of the clamping jaws (5, 6 or 7, 8) on the workpiece (2) is inserted, and a corresponding transmission pin (14, 15) is provided laterally adjacent to the bolt (13) and coupled drivably to the rocker (11), the respective clamping jaw (5, 6, 7, 10 or 8) being mounted and supported at the end of the transmission pin opposite the rocker (11).

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.

An adaptive precision chuck for a precision/ultraprecision machining system is described. The chuck (200) defining a mount for receiving a workpiece (300) wherein, when in use, the centre of the mount is configured to be substantially concentric with an axis of rotation (214) of the machining system, the chuck (200) further including jaws (210) about the mount and a plurality of compliant flexures (203-206) configured, upon application of rotational forces by the machining system to the chuck about the axis of rotation (214), to engage the jaws (210) upon a workpiece (300) in the mount.

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.

A device for clamping a workpiece comprises a chuck body and a drive fastened thereto, and at least one clamping jaw, which is coupled to the drive in a driveable arrangement either directly or via intermediate elements and which is or are held movably in or on the chuck body in the direction of the workpiece. This is achieved by providing a free space between the chuck body and a clamping jaw carrier accommodating the clamping jaw, in that an elastically deformable sleeve is inserted in the free space, which sleeve rests on the outside of the chuck body at two positions spaced apart from one another, and in that a pressure chamber is created between the chuck body, the sleeve, and the two support positions into which a medium can be filled, whereby to bulge the latter in the direction of the clamping jaw carrier between the support positions.

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.

An adjustable collet holder for use with a lathe is provided. The adjustable collet holder may include a set of hold down screws to hold it in place once adjusted. Adjustment may be achieved by adjusting multiple set screws to change both angular and concentricity orientations of a collet receiver relative to a body of the collet holder.

An adjustable collet holder for use with a lathe is provided. The adjustable collet holder may include a set of hold down screws to hold it in place once adjusted. Adjustment may be achieved by adjusting multiple set screws to change both angular and concentricity orientations of a collet receiver relative to a body of the collet holder.