The movable counter bearing has a vertically arranged faceplate. The counter bearing is used with another workpiece positioner. The workpiece fixture is mounted between the two faceplates of the counter bearing and the selected workpiece positioner. The counter bearing can be moved on the base frame manually (WP-C-M) or by a motor (WP-C-E). Thus, the distance between the two faceplates can be adjusted according the different workpiece sizes.