Abstract: A fixturing device, usable with various fixturing components as a universal modular fixturing system, has a slot and a shaft, the slot and the shaft intersecting and having a common plane of symmetry, the fixturing device having a plurality of transverse bores intersecting the slot and the shaft, perpendicular to the plane of symmetry. The fixturing device is used according to one or more of three clamping techniques. The first clamping technique is back-clamping in which a workpiece having a threaded recess is clamped by a bolt from the back of the slot. The second clamping technique is relocatable clamping in which a clamp support supporting a clamp clamping a workpiece is displaceable along the shaft. The third technique is lever-arm clamping in which a lever arm, pivotally mounted on a pin located in one of the transverse bores, is rotated to clamp a workpiece.

Abstract: A universal sleeve-clamp for using interchangeable jaw pieces to clamp a workpiece has a sleeve with a plurality of radially moveable elements. Features are provided for locating and attaching the jaw pieces to the radially moveable elements so that, when a clamping taper is made to bear against the radially moveable elements, the radially moveable elements, and hence the interchangeable jaw pieces, are moved radially to clamp the workpiece. The clamping taper may be externally tapered to form an expanding mandrel, or internally tapered to form a collet chuck. The jaw pieces, which are made of soft metal or other easily machinable material, may be shaped for clamping multiple diameters, clamping thin-walled workpieces or for clamping a workpiece eccentrically. A locator plate is used to give additional support to a workpiece, or to align it in a known rotational position for static fixturing.