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The LiftMaster 71-1550B42LGH Sprocket Kit is a precision-engineered 42-tooth drive sprocket designed for LiftMaster operator systems that utilize a 1" shaft with a 1/4" keyway. Proper fitment and tooth count ensure secure mounting, accurate chain engagement, and smooth power transmission during operation.
Built for durability in commercial and 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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