For more information, please contact customer service iso9001 gcr15 single row 861/854 chrome steel taper roller bearing for Industrial Equipment The 861/854 is a single-row inch-series tapered roller bearing, engineered to withstand combined radial and axial loads, widely used in heavy-duty trucks, industrial reducers, construction machinery axles, and automotive transmissions. Model breakdown: "861" refers to the inner ring (cone) code; "854" refers to the outer ring (cup)