Ronstan RF55410 Sailboat Sailing Series 55 Ball Bearing Swivel Head Quadruple Becket Orbit Block

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  • Regular price $219.95
  • 4 available


  • Ronstan RF55410 Sailboat Sailing Series 55 Ball Bearing Swivel Head Quadruple 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.
  • Materials:
    • Ball bearings - High compression strength carbon black Acetal. 
    • Stage 2 bearing - Carbon fibre reinforced, PTFE impregnated Nylon. 
    • Cheeks - Toughened, glass fibre reinforced Nylon. 
    • Rope Link: UV-stabilised, multi-strand impregmented SK75 Dyneema
    • Head fitting: grade 316 stainless steel. 
    • Ball Bearings: high compression strength carbon black Acetal
  • B.L.: 1500kg (3300Lbs)
  • M.W.L.: 750kg (1650Lbs)
  • Max. Rope diameter: 10mm (3/8")
  • Pin Ø: 5mm
  • Application:
    • Mainsheet systems on dinghies, sportsboats and small keelboats to 9 m (30')
    • Spinnaker sheets on dinghies, sportsboats and small keel boats to 9 m (30')
    • Halyard, Vang and Backstay application on boats to 8 m (26')
    • Control line applications on larger yachts
    • Mainsheet systems and spinnaker sheets on dinghies, catamarans, sportsboats and small keel boats to 9 m (30')
    • When paired with a RF56330B and a RF35101 lashed to the becket produces a powerful 8:1  mainsheet system for use on catamarans to 5.5 m (18')
  • Manufacturer: Ronstan
  • Model Number: Series 55 Orbit Block
  • Part Number: RF55410