Luna Bearings supplies Contaminant Proof Linear Stage. Luna Bearings offers linear motion products such as roller guide ways, maintenance free guide ways, high precision C5 grade rolled ball screws, ground ball screws, high DMN value super cassette type ball screws, precision racks, super ball bushings, linear actuators, linear motors ,dual shaft guides and position measuring systems. Contaminant Proof Linear Stage is a slider which is actuated by motor driven bearing and guided by a linear guide ways with a U-shape rail [a"U-rail"]. Contaminant Proof Linear Stage acts as the ball bearing nut and, meanwhile, the guide way block. The U-rail not only guides the movement of the slider, but also can be used as a structural component assembled into one multi-axis motion system. It is available in KK Type.