Renold Couplings’ RBI flexible coupling offers a general-purpose, and cost-effective range which is manufactured in SG iron for torques up to 60 kN/m. The rubber-in-compression technology enables RBI couplings to be 100% maintenance-free, reducing total cost of ownership.


  • Intrinsically fail-safe, ensuring continuous operation of the driveline.
  • Rubber elements designed with optimum stiffness, achieving low vibratory loads in the driveline.
  • No lubrication or adjustment required.
  • Avoids failure of the driveline under a short-circuit scenario and other transient conditions.
  • Misalignment capability, allowing axial and radial misalignment between the driving and driven machines.
  • Pre-compressed rubber elements, eliminating backlash.
  • Easy, in-situ inspection enabled.
  • Offer 50% more torque, with a smaller footprint, than the predecessor (Renold RB range).
  • Rubber-in-compression is 5x stronger than rubber-in-shear.
  • Suitable for use in applications where temperatures are between -40ºC and +100ºc.
  • Can be adapted to meet customers’ specific requirements, with several design variations possible.
  • SG Iron to BS 2789 Grade 420/12 (EN1563).
  • Separate rubber elements with a standard SM80 shore hardness.
  • Suitable for a broad range of industries
    and applications from conveyors and crushers in quarries to cranes and compressors in the oil & gas industry.


Enquire about RBI couplings from Renold by speaking to the team at your local Hayley Group branch. Find their details by using our Branch Finder tool.



Maintenance Essentials Issue 8

This product features in Issue 8 of Maintenance Essentials magazine.