Belt Drive Tensioner

FleetRunner Heavy-Duty Automatic Belt Tensioners are the longest-lasting belt tensioners in the industry, engineered to exceed demanding OEM requirements. In laboratory tests under extreme peak-to-peak vibration and contamination tests, FleetRunner heavy-duty tensioners lasted up to 3X longer than competitive aftermarket tensioners.
Optimized components engineered for maximum strength and durability; Patented design provides superior belt alignment and tension for improved drive efficiency and life; Patented labyrinth seal prevents contamination of internal parts for maximum durability and service life; Long-lasting steel pulleys with dust shields to protect internal bearings from contamination; Double row bearings carry more load and last up to 3X longer than two individual bearings; Chrome-silicone round torsion spring for less ?ex-fatigue than ?at-spring designs; Patented damping mechanism provides maximum stability, reducing vibration and increasing the life of the belt, tensioner and other accessory drive components