Abstract: The invention indicates a device and a process for clamping tools in a clamping chuck which possesses a shrinkage segment (14) to receive the tool, with a heating apparatus (26), preferably designed as a gas burner, being associated with the shrinkage segment (14). The tool is clamped in the clamping chuck (20) with a press fit in the shrinkage seat, resulting in especially high clamping force. To prevent local overheating of the clamping chuck (20) and achieve complete insertion of the tool shaft into the thermally expanded shrinkage segment (14) of the clamping chuck (20), a receiving apparatus (40)--by means of which, for clamping purposes, the tool can be elastically pressed in the axial direction against the shrinkage segment (14)--is provided to receive the tool.

Abstract: A cylindrical standard shank is provided for rotating cutting tools for locating a standard shank in a cylindrical location opening, precisely produced with regard to shape and true-running accuracy, in the work spindles of so-called transfer lines or of, for example, steep-taper adaptors. The cutting tool is, in turn, fixed by a cylindrical press connection in the standard shank serving as an adaptor between the tool shank and standardized location opening. The standard shank has, at the front, a longitudinally slotted clamping sleeve accurately machined on the inside and outside. The clamping sleeve is clamped by an accurately machined shrink collar of shape-memory alloy which is approximately the same length and has at least the same wall thickness, is present in the austenitic structural state at room temperature and in the process is reduced in diameter on account of suitable pretreatment, and bears tightly against the periphery of the clamping sleeve.

Abstract: An improved machine tool having means for automatically sensing axial movement of the jaw members relative to the collet housing and for adjusting the axial position of the collet to automatically compensate for the jaw movement to allow radial gripping of the workpiece with no axial movement.

Abstract: A drill chuck is provided for surgical drilling machines in which the entire chuck is made of material permeable to X-radiation.

Abstract: A wheelhead assembly for use upon a vertical rotary power drive shaft of a potter's wheel includes a top plate, a drive shaft coupler, and a locking arrangement for releasably securing and adjustably relocating the top plate relative to the drive shaft coupler. The top plate has a planar upper surface for supporting a mass of clay to be molded into a composite article of pottery. The drive shaft coupler has a fixed axis of rotation and is capable of supporting the top plate upon the rotary drive shaft of the potter's wheel for rotation with the coupler about its axis of rotation.

Abstract: A rotary tool is provided with a shank and a collar-like section, and further includes a plurality of screw-threaded holes drilled in a vertical end face of the collar-like section, in parallel relationships with the axis of the collar-like section. A plurality of balancing weights are removably screwed in the holes as required to balance the tool.

Abstract: A wafer spinning assembly for use in wafer processing includes a chuck for holding a wafer, a vertically oriented spindle connected to drive the chuck, and a spindle drive motor. The spindle drive motor includes an enclosed cylindrical housing which is enclosed on a top end with a top end cap having an outside surface impermeable to infiltration by wafer processing solutions. A drive shaft is mounted inside the housing for rotational movement and out an unsealed aperture in the top end cap. A motor mounted inside the housing provides electromotive rotational force to the shaft in response to electric power supplied to the motor through a plurality of brush assemblies. The top end cap includes a cylindrical collar portion extending outwardly from the outside surface, oriented generally horizontally, of the top end cap and around the shaft. The motor is deployed so that the shaft is actually aligned with the spindle.