NT2 oval head, automatic device linear spring-action chain drive tensioner consisting of an aluminium base with tensile strength of 240MPa, completely sealed to prevent infiltration by external agents. The chain tensioner, with its self-lubricating plastic glide bushings, glides on high tensile strength galvanized steel rods to which the chain tensioning head or shoe in polyethylene 1,000,000 UHMW is fastened.
