DAYCO® NO SLACK® Automatic Belt Tensioner
Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on serpentine belt drives, the Dayco Automatic Belt Tensioner features the original flat spring design engineered to provide less operating range variations in tension. This innovative design reduces the risk of premature accessory bearing failure due to high tension when a new belt is installed and lessens the risk of belt noise and slippage, or poor accessory performance caused by low tension after the belt begins to stretch and wear. A PTFE strip wound within the spring resists abrasion and the flat spring is coated to resist rust.
Other superior design features include:
Steel locator pin (where the application demands)
Heavy duty cast aluminum spring case that resists cracking and fatigue
Heavy duty cast aluminum arm offers additional strength and less distortion
Steel pivot tube (where the application demands) provides additional strength for critical torque requirements
Thermoplastic rubber spring slot plug (where applicable) helps keep out harmful contaminants
Lubricated nylon pivot tube bushing and spring bushing for quieter performance
Rubber „O“ ring which seals against dust and grime (where applicable)
Zinc-coated mounting bolt that resists rust (where applicable)
Dayco also manufactures a variety of round spring and hydraulic-controlled tensioners depending on the original equipment design and application requirements.