Hengjiu agricultural roller chain consists of S type, C type and other series deriving from them, and is equipped with such complete accessories as K, M, C and F attachments. It can be extensively used in the mechanical fields like farming, architecture, loading and transportation. Its quality does meet or exceed the requirements of original equipment manufacturers. By today, the alloy clad surface treatment technology is employed in making axis pins of the chain. Chains installed with axis pins which have been subject to alloy clad surface treatment can undergo the most