Allen-Bradley 20D Mechanical Shaft Coupling

Allen-Bradley 20D Mechanical Shaft Coupling is an industrial-grade, shaft-mounted torque-transmission component (Part Number 20D) designed for direct replacement in industrial power-transmission systems. It provides rotational power transfer with a 2.5 in inside diameter and a 2.1 in outside diameter, built as an industrial-grade metal coupling for use with pumps, motors, gearboxes, and drive systems. The coupling connects rotating shafts and accommodates minor misalignment and vibration, widely used in pumps, conveyors, gear reducers, compressors, mixers, and general manufacturing gear trains to reduce shock loads and drivetrain vibration. Maintenance teams and system integrators rely on the 20D for replacement, repair, and retrofit projects to maintain performance and minimize downtime in industrial environments. Common replacements include Lovejoy jaw coupling with matching bore dimensions, Martin flexible coupling matching a 2.5 in bore, and Browning industrial coupling equivalents to 20D specifications.