Liftmaster 71-6125 Commercial Jackshaft Opener Chain Tensioner

Maintain the correct amount of tension in the chain of your garage door opener with the LiftMaster 71-6125 Commercial Jackshaft Opener Chain Tensioner sold by North Shore Commercial Door specifically for 1 1/4-inch shafts to apply tension to the drive chain in between the garage door opener and the shaft of the door. NSCD also sells tensioners for 1-inch shafts, which require item No. 71-6023 instead. The tensioners come with the instruction manual.

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