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The LiftMaster 71-1550B72TKH Sprocket Kit is a precision-engineered 72-tooth drive sprocket designed for LiftMaster operator systems that utilize a 1.5″ shaft with a 3/8″ keyway. The larger bore and keyway configuration support smooth power transmission and controlled chain engagement in heavy-duty and industrial-grade applications.
Built for durability in high-cycle environments, this sprocket helps maintain proper drive alignment while reducing wear on chains and associated components. Replacing worn sprockets with the correct bore size, keyway, and tooth count supports efficient operation and long-term reliability of the operator drive assembly.
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