elastomer coupling / torsionally elastic / for shafts / cast iron
S-Flex series Lovejoy



  • Type:

    elastomer, torsionally elastic

  • Product applications:

    for shafts

  • Material:

    cast iron

  • Other characteristics:


  • Installation system:


  • Torque:

    Min.: 6.78 Nm (5.0007 ft.lb)

    Max.: 5,338.54 Nm (3,937.505 ft.lb)

  • Rotational speed:

    Min.: 1,500 rpm (9,424.78 rad.min-1)

    Max.: 9,200 rpm (57,805.3 rad.min-1)


This range of S-Flex Couplings come with an extensive list of features to include easy installation, maintenance and lubrication free, dampen vibrations and controls shock, dual engagement and torsionally soft. These S-Flex Couplings feature a simple design, which guarantees easy installation and dependant performance. Adding to this, there are no additional tools required for removal as well as installations. These coupling products are a combination of three parts. Two flanges with an internal teeth connect with an elastomeric flexible sleeve and exterior teeth.

Each flange is tied with a corresponding shaft of the driver and powered and the torque is transferred across the flanges through the sleeve. Torsional and misalignment torque loads are absorbed by the shear deflection of the sleeve. These characteristics of SFlex couplings make them perfectly suited to absorb impact loads. The SFlex couplings from Lovejoy provide a wide range of configurations of flanges and sleeves that can be customized to suit specific applications. There are thirteen sizes to choose from with torque capabilities that range from 60 in-lbs (6.78 Nm) to 72,480 in-lbs (8189 Nm).

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