Lenze 's GR flexible shaft coupling range offers two grades of
polyurethane for the flexible element, allowing fine-tuning of torsional
stiffness and torque capacity. You also have a choice of hub material,
including steel, aluminium and cast iron, which altogether provides
numerous assembly combinations to meet a variety of needs. Maximum torque
capacity is 1,465Nm and shaft sizes are from 5 to 90mm diameter.