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Novus Gear N-Flex RB Couplings


Manufactured in SG iron for torques up to 41kNm. Novus Gear's N-Flex RB general purpose range of couplings, are incredibly cost effective.

The Standard Range Comprises

  • Shaft to shaft
  • Shaft to shaft with increased shaft engagement
  • Flywheel to shaft
  • Flywheel to shaft with increased shaft engagement


  • Generator sets
  • Pump sets
  • Compressors
  • Wind turbines
  • Metal manufacture
  • Bulk handling
  • Pulp and paper industry
  • General purpose industrial applications


  • Intrinsically fail safe
  • Control of resonant torsional vibration
  • Maintenance free
  • Severe shock load protection
  • Misalignment capability
  • Zero backlash
  • Low cost


  • Ensuring continuous operation of the driveline in the unlikely event of rubber damage
  • Achieving low vibratory loads in the driveline components by selection of optimum stiffness characteristics
  • With no lubrication or adjustment required resulting in low running costs
  • Avoiding failure of the driveline under short circuit and other transient conditions
  • Allows axial and radial misalignment between the driving and driven machines
  • Eliminating torque amplifications through precompression of the rubber elements
  • The RB Coupling gives the lowest lifetime cost

Construction Details

  • Cast Iron to BS 17 grade
  • Spheroidal graphite to BS 2789 Grade 420/12
  • Separate rubber elements with a choice of grade and hardness with SM70 shore hardness being the standard
  • Rubber elements which are totally enclosed and loaded in compression