YNF17798 AR55 Coupling Heavy Duty Rubber Coupling Insert Excavator Pump Coupling Rubber

The YNF17798 AR55 Coupling Rubber is a heavy-duty flexible coupling insert used in large excavators, mining machinery, and industrial hydraulic pump drive systems. AR55 couplings are designed to transmit high torque while protecting critical drivetrain components from vibration, shock loads, and misalignment.

Manufactured from premium oil-resistant and fatigue-resistant rubber, this coupling insert maintains stable elasticity under high load, elevated temperature, and long operating hours. It effectively reduces torsional vibration during startup and operation, minimizing stress on pump shafts, bearings, and engine output flanges.

Widely adopted by professional repair workshops and global aftermarket distributors, the YNF17798 AR55 coupling rubber is a reliable replacement solution that improves power transmission smoothness, reduces noise, and extends the service life of hydraulic pump and engine assemblies.