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The LiftMaster 71-1550B82QGH Sprocket Kit is a precision-engineered 82-tooth drive sprocket designed for LiftMaster operator systems that utilize a 1.25″ shaft with a 1/4″ keyway. The high tooth count supports smooth power transmission and controlled chain engagement, especially in heavy-duty and commercial-grade applications.
Built for durability in high-cycle environments, this sprocket helps maintain proper drive alignment while reducing wear on chains and related components. Replacing worn drive 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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