The inner ball is made of corrosion-resistant, UV-aging resistant and friction-optimized composite material DURAPLAS® MN527, the bearing housing is made of high-strength and UV-aging resistant composite material DURAPLAS® M163, and the metal clamp is made of high-strength. The inner ball is made of corrosion-resistant, UV-aging resistant and friction-optimized composite material DURAPLAS® MN527, the bearing housing is made of high-strength and UV-aging resistant composite material DURAPLAS® M163, and the metal clamp is made of high-strength. The specific low wear, low friction behavior of MN527 facilitates smooth function of the bearing and does not need frequent greasing or maintenance that is required with metal bearings. MN527 also offers better tolerances than metal bearings,which results in better alignment of trackers in the. Our spherical plain, plain and linear bearings made of high-performance polymers are successfully used, for example, in tracked PV tracker systems, fixed mounting systems, floating photovoltaic systems and cleaning systems. The advantages of our bearing: Convince yourself of the quality of our. GSQB is a split bearing specially developed for solar trackers. It has the characteristics of high load capacity, simple installation, self-lubricating and maintenance-free, and high UV resistance. In order to simplify on-site assembly and improve assembly efficiency, the internal ball and the. Photovoltaic (PV) applications require durable materials that can perform outdoors for long durations, often up to 25 years. Photovoltaic systems and components include solar tracking systems and their tracker bearing components. Why Are Bearings Critical for Solar.