<p>The shoe has an upper part (20) attached to a machine base by a screw fastening part including a fastening screw (50). A driving wedge (30) is arranged between the upper part and a lower part (10) for changing distance of the driving wedge over a wedge surface. The driving wedge is forwardly and rearwardly moved by a leveling spindle (40). The spindle is attached to the upper part and the lower part by a fastening part. The screw fastening part is arranged on a center of the upper part with respect to a horizontal direction perpendicular to the leveling spindle.</p>
