The Lovejoy S-Flex coupling design is comprised of three parts: two flanges with internal teeth that engage an elastomeric flexible sleeve with external teeth. Torque is transmitted through the flanges mounted on both the driver and driven shafts via the sleeve. The shear characteristic of the S-Flex coupling is very well suited to absorb impact loads. Misalignment and torsional shock loads are absorbed by shear deflection in the sleeve. Lovejoy's S-Flex coupling offers combinations of flanges and sleeves which can be assembled to suit your specific applications. The S-Flex flanges are offered in five models which are made from zinc or cast iron. Sleeves are available in EPDM rubber, Hytrel or Neoprene to address a wide variety of application requirements. Lovejoy S-Flex couplings are 100% fully interchangeable with the industry standard.