438221 Stromag OEM Drive Coupler

The 438221 Stromag OEM Drive Coupler is a Stromag Periflex shaft coupling used in industrial and compressor drive applications. Stromag’s 438-series part numbers identify specific Periflex coupling configurations designed for connecting two shafts in diesel engine and electric motor driven equipment.

Stromag Periflex shaft couplings use a rubber-fabric tire element that provides high torsional flexibility while accommodating angular, radial, and axial misalignment. These couplings are widely used in air compressor systems, generator sets, construction machinery, and general industrial equipment. The Periflex design is especially valued in diesel-driven applications where its damping characteristics effectively attenuate engine firing-pulse vibration.

The 438221 is a direct OEM replacement. During installation, verify that the shaft tyre’s teeth engage the hub profiles fully. Check alignment between the driving and driven shafts and ensure the coupling operates within the manufacturer’s specified temperature range. Inspect the rubber-fabric element at each scheduled maintenance interval.

Stark Industrial Products carries Stromag Periflex couplers for compressor and industrial driveline applications.