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+1 (217) 579-8045Shop U.S.Tsubaki 80B10F-1 and trust MRO to be your reliable U.S.Tsubaki supplier to experience the difference that quality and expertise can make. Trusted since 1898. Fast, Free Shipping. Associated with "B" style sprockets where the inside diameter of the hub is machined with a standard keyway and two set screws. Finished bore hubs can also be machined to specific requirements depending on the needs of the application.