Abstract: A system for holding a workpiece has a support table having a support surface and formed with an array of anchor seats opening at the support surface. At least one clamp securable in a one of the seats has a clamp body displaceable parallel to the support surface. A stop body normally lying on the surface has a centering formation defining an axis generally perpendicular to the support surface and has a polygonal periphery defined by a plurality of flat sides generally perpendicular to the surface and lying at different spacings from the axis. An anchor centered on the axis and seated in a one of the seats secures the stop body to the surface with one of its sides bearing against the workpiece and the stop-body axis fixed relative to the respective seat.

Abstract: The invention relates to a work piece clamping device with a base plate for vacuum-type clamping of work pieces. The base plate 6 comprises a system of grooves 9 at its surface 8, a seal 57 is placed into selectable grooves 10 of the system of grooves 9 and channels 52, which can be opened discharge into the grooves 10, lead to at least one vacuum source junction 56 on the base plate 6.