The ACT4UN-Kit Reich OEM Drive Coupler is a complete coupling kit from the Reich Arcusaflex ACT series. This kit includes the components needed to service or replace the ACT4UN coupling assembly on industrial compressors, pumps, and power transmission equipment.
Reich Arcusaflex couplings are specified by equipment manufacturers across Europe and North America for applications requiring precise torsional damping and compact installation. The ACT4UN is a mid-range Arcusaflex size that handles the torque output of medium-duty diesel and electric drives. Purchasing the complete kit ensures all mating components are matched and factory-specified, eliminating the risk of mismatched parts that can cause premature wear or vibration issues.
Install the kit components per the Reich coupling installation guide. Verify shaft alignment within the specified tolerance, confirm proper element seating in both hubs, and check for free rotation before applying load. Replace the complete kit rather than individual components to ensure balanced performance.
Stark Industrial Products stocks Reich Arcusaflex coupling kits for same-day shipping.

























