FALK BU4215J Keyless Bushing clamps a shaft without a key to transmit torque between components. The model carries the 2.188 specification and part number 0769139, identifying it as a Falk BU4215J bushing designed for a keyless shaft interface. Typical applications include mounting pulleys, gears, or hubs onto a shaft where a traditional keyway is not used, offering a compact, alignment-friendly connection.
