Unlike linear ball bearings, drylin linear bearings run on sliding elements. They are equipped with materials that are perfect in terms of wear and friction for most linear applications. They reduce wear on your equipment and noise. Drylin linear bearings were created to run dry. Your application is thus protected from fouling generated by grease and oil. Unlike ball systems, the operating characteristics of drylin linear bearings are not dependent on stroke length, nor are they constrained by minimum stroke lengths.