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Ronstan S55 BB Orbit Block,Quad Becket Swivel (RF55410)

Ronstan S55 BB Orbit Block,Quad Becket Swivel (RF55410)

by Ronstan
$275.08 - $275.08
$275.08
$275.08
$275.08 - $275.08
$275.08
SKU RF55410

Kilogram for kilogram of working load, BB and RT Orbit Blocks ’?½ are the world ’??s lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimises the mass of the inactive return race and hub.

Weight and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result? The lowest weight possible.

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.

Sheave ? 55 mm
Max. Rope ? 10 mm
Max. Cable ? mm
Pin ? mm
M.W.L. 750* kg
B. L. 1500 kg
Weight 316 g

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)
  • RF55410 when paired with a RF56330B and a RF35101 lashed to the becket produces a powerful 8:1 mainsheet system for use on catamarans to 5.5m
  • (18ft). This can be increased to 9:1 by replacing the RF35101 with a RF35202
  • Halyard, vang and backstay applications on boats to 8m (26ft)
  • Control line applications on larger yachts

Materials:

  • 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
  • Ball Bearings: high compression strength carbon black Acetal