Luna Bearings supplies High Precision Linear Motion Bearings. 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. High Precision Linear Motion Bearings offer unlimited backward and forward linear movement with minimum frictional resistance during which the balls are constantly returned to the loaded zone in closed circuits. High Precision Linear Motion Bearings enable accurate linear guides to be constructed simply and economically. The requisite linear ball bearing for given linear guidance application is selected on the basis of its load carrying capacity in relation to the load being applied and the requirements in terms of operational life and reliability.