Item #879853

Ronstan 55 mm (2 5/32") Series 55 Ball Bearing Orbit Double Block - RF55210

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Image of : Ronstan 55 mm (2 5/32 Ronstan 55 mm (2 5/32") Series 55 Ball Bearing Orbit Double Block - RF55210 Item # 879853

Description

Ronstan Ball Bearing Orbit Blocks™ boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and a Dyneema® rope link head. Their precision design allows the optimum number of ball bearings in loaded areas and eliminates them in inactive areas. Ineffective mass is reduced even further through fiber-reinforced composites in the block head, cleat arms and beckets.

Features:

  • 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 for ultimate durability and compatibility with harsh fixing points
  • Ultra low profile integrated beckets
  • Applications:
    • Mainsheet systems on dinghies, sportsboats and small keelboats to 9m (30ft)
    • Spinnaker sheets on dinghies, sportsboats and small keel boats to 9m (30ft)
    • Halyard, Vang and Backstay application on boats to 8m (26ft)
    • Control line applications on larger yachts
    • 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

Specifications:

  • Sheave: 2 5/32"
  • Max. Line Size: 3/8"
  • Max. Working Load: 1650 lbs
  • Breaking Load: 3300 lbs
  • Weight: 6.1 oz

Total block load. Load on becket not to exceed 33% of block load. ie. MWL 250 kg (550 lb), BL 500kg (1100 lb)

Materials:

  • Ball bearings - High compression strength carbon black Acetal
  • Stage 2 bearing - Carbon fiber reinforced, PTFE impregnated Nylon
  • Frame/Cheeks - Toughened, glass fiber reinforced Nylon
  • Rope Link: UV stabilized, multi-strand SK75 Dyneema®
  • Head fitting: grade 316 stainless steel
  • Ball Bearings: high compression strength carbon black Acetal

Part Numbers for Ronstan 55 mm (2 5/32") Series 55 Ball Bearing Orbit Double Block - RF55210

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