Ronstan RF55310 Sailboat Sailing Series 55 Ball Bearing Swivel Head Triple Becket Orbit Block

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  • Regular price $129.95


  • Ronstan RF55310 Sailboat Sailing Series 55 Ball Bearing Swivel Head Triple Becket Orbit Block
  • Ultra Lightweight.
  • Low friction 2-stage Orbital ball bearing system.
  • Highest working load in its class.
  • Low profile and compact.
  • High performance cleating
  • Swivel shackle head for unlimited block rotation.
  • Stainless steel shackle head and compatibility with sharp fixing points.
  • Ultra low-profile integrated beckets.
  • Load on becket not to exceed 33% of block load.
  • Material:
    • Ball bearings - High compression strength carbon black Acetal. 
    • Stage 2 bearing - Carbon fibre reinforced, PTFE impregnated Nylon. 
    • Frame/Cheeks - Toughened, glass fibre-reinforced Nylon. 
    • Rope Link: UV-stabilised, multi-strand impregmented SK75 Dyneema
    • Head fitting: grade 316 stainless steel. 
  • B.L. (kg): 1500 (3300Lbs)
  • M.W.L. (kg): 750 (1650Lbs)
  • Max. Rope diameter (mm): 10 (3/8")
  • Pin Ø (mm): 5
  • Application:
    • Mainsheet systems and spinnaker sheets on dinghies, catamarans, sportsboats and small keel boats to 9m (30ft). Halyard, vang and backstay applications on boats to 8m (26ft). Control line applications on larger yachts
  • Manufacturer: Ronstan
  • Model Number: Series 55 Orbit Block
  • Part Number: RF55310