The rotation parts of CSB-PEC series rotary chain are with self-lubricated plastic bearings,
the material CSB-EPB15 used in the plastic bearings provides maintenance free feature of
the chain system and with the anti-dust and anti-corrosion feature of the bearing material, the
chain system could be free to operate under critical conditions. The long term stable operation
with low noise design of PEC chain prevent the chain system from stuck and operation failure
comparing with the traditional rolling bearing design. The metal parts of the PEC chain are
specially treated for the long term outdoor operation.