The UZS80 vertical linear stages released by Newport Corp. achieve submicron resolution, and their low-profile inclined-plane design makes them suitable for space-limited X-Y-Z positioning applications. Two opposing wedges move past each other via inclined ball-bearing races, and a leadscrew translates the lower edge horizontally. This motion is converted into vertical translation by the inclined ball races. The upper wedge is constrained by vertically mounted ball-bearing slides to eliminate side motion. The stages offer 4.5-mm vertical adjustment of loads up to 30 N and are available in DC motor and stepper motor versions. Both have a travel range of 4.5 mm, a minimum incremental motion of 0.2 μm, typical pitch of 70 μrad with 150 μrad guaranteed, and typical roll of 70 μrad with 200 μrad guaranteed.