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Ronstan S30 BB Orbit Block,Stand Up,Swivel (RF35140)

SKU:  RF35140

Brief Description:

Ball Bearing Orbit Blocks™ boast the highest strength-to-weight ratio available.  This is achieved through all-composite reinforced polymer materials and multiple attachment options. 
Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.
  • Lightweight
  • Highest working load in its class
  • Secure, versatile and secure attachement
  • Low profile and compact


  Sheave Ø 30 mm
  Max. Rope Ø 8 mm
  Max. Cable Ø - mm
  Pin Ø - mm
  M.W.L. 300 kg
  B. L. 600 kg
  Weight 33 g



  • Mainsheet systems and spinnaker sheets on dinghies to 5m (16ft)
  • Halyard, vang and backstay applications on boats to 5m (16ft)
  • Control line applications on larger yachts



  • Sheave: High compression strength carbon black Acetal
  • Ball Bearings: High compression strength Acetal
  • Frame/Cheeks: Toughened, glass fibre reinforced Nylon
  • Link: UV stabilised, multi-strand impregnated SK75 Dyneema®


User Instructions:

For comprehensive user instructions, spare part tables, fastener sizes, etc see BB & RT OrbitBlock™ User Instructions


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