The ACH6.5WN Reich Arcusaflex Drive Coupler is a heavy-duty OEM coupling from the Reich ACH series, size class 6.5 with a flanged hub on one side and a standard keyway bore on the other. This coupling serves large industrial compressors, heavy diesel-driven equipment, and mining support machinery.
The ACH6.5 size class handles substantial torque from high-horsepower diesel engines and industrial motors. The flanged hub interface connects to engine flywheel housings or equipment flanges, while the keyed bore side mounts to the driven shaft. This coupling is specified in equipment used across construction, mining, and heavy industrial applications where torque demands exceed lighter-duty coupling ratings.
At this coupling size, proper installation technique is essential. Follow the equipment manufacturer’s alignment specifications, use calibrated torque equipment, and verify alignment with dial indicators before returning to service.
Stark Industrial Products carries ACH6.5-class Arcusaflex couplers for heavy industrial equipment maintenance.

















