The ACT4.1WN Reich Arcusaflex Drive Coupler is an OEM coupling from the Reich ACT series, size class 4.1. This coupling provides a flanged hub on one side and a standard keyed bore on the other, suited for compressor and industrial equipment where the driving and driven shafts have different connection requirements.
The ACT4.1 size class serves equipment in the mid power range, handling the torque demands of portable compressors and industrial drives. The flanged hub interface is specified in equipment where the coupling connects an engine flywheel housing or SAE adapter to a standard keyed shaft on the compressor or pump side.
The ACT4.1WN is a direct replacement for equipment originally fitted with this coupling. The two hub sides are not interchangeable – verify correct orientation during installation. Follow the equipment manufacturer’s alignment procedure and torque specifications.
Stark Industrial Products stocks ACT4.1 Arcusaflex couplers for compressor and equipment maintenance.

















