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Ronstan 55 mm Series 55 RT Orbit Ratchet Block

  • Single Ratchet Block with Swivel Head
  • Safe Working Load: 550 lbs
  • Maximum Line Size: 3/8"
  • Item #: 
    Model #: 


    Shipping Weight: 
    0.20 Lbs.
    List Price: 
    Status:  null In Stock

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    Series 55 RT Orbit Block™, Single with auto & manual ratchet and swivel head


    • Swivel shackle head for unlimited block rotation.
    • Stainless steel shackle head for ultimate durability and compatibility with harsh fixing points.
    • Auto & manual ratchet engagement modes.
    • Up to 20:1 holding power.
    • Mainsheet systems and spinnaker sheets on dinghies, sportsboats and small keel boats to 8m ( 26 feet )
    • Halyard, vang and backstay applications on boats to 8m (26ft).
    • Spinnaker sheets on sportsboats and small keel boats (lateral lead blocks)
    • Control line applications on larger yachts.
    • Ball Bearings: High compression strength carbon black Acetal.
    • Sheave : Hard anodized aluminum.


    • Safe working load: 550 lb (250 kg)
    • Breaking load: 1430 lb (650 kg)
    • Weight: 2.9oz (82g)
    • Sheave diameter: 2-5/32" (55 mm)
    • Maximum line size: 3/8" (10 mm)


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