This chain hoist is designed for manual operation of commercial roll up doors. The 6.6:1 reduction helps reduce the force needed to lift and lower the door curtain.
It includes a #50 chain, 48-tooth #50 sprocket, 1 1/4″ bore, set screw, hand chain, and chain keeper. This chain hoist works with compatible torsion spring rotating barrel assemblies for roll up doors that require a manual chain-driven lifting system.
This part is commonly used for replacement, repair, or new roll up door hardware installation.
