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The LiftMaster 71-1550B72LGH Sprocket Kit is a precision-engineered 72-tooth drive sprocket designed for LiftMaster operator systems that utilize a 1" shaft with a 1/4" keyway. The large tooth count supports smooth power transmission and controlled chain engagement throughout heavy-duty and commercial-grade operation.
Built for durability in high-cycle environments, this sprocket helps maintain proper drive alignment while reducing wear on chains and related 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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