Abstract: The invention relates to a clamping device which contains a structure (1), two carriers (2, 3) which are disposed in the structure (1) and have at least one clamping jaw (5, 6) each, and an adjusting spindle (4) for adjusting at least one carrier (2). In order to make possible a compact, relatively inexpensive construction which is protected against contamination, the carriers (2, 3) are constructed as half shells surrounding the adjusting spindle (4).

Abstract: A forwardly opening parallel vice has a housing (1) which can be fixed to a workbench (3) and which carries the stationary clamping jaw (2) and which is provided with a quadrangular guide structure. Displaceable in the guide structure is a hollow slider which is supported with a plurality of guide surfaces (13) on the guide tracks (11) of the guide structure and which carries the movable clamping jaw (14). Of a screw spindle-nut assembly (15-17) which is provided in the slider (12), one part (15, 16) is mounted rotatably and axially immovably in the slider (12) while the other part (17) is fixed to the housing (1). The slider (12) is of square cross-section and the axis (A) of the screw spindle is arranged precisely at the center of the square cross-section.