Item #880020

Ronstan Series 55 Ratchet Orbit Block - RF56530

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Ronstan Series 55 Ratchet Orbit Block - RF56530

Item # 880020

Description

The world's best ratchet block is now even better. The Ronstan Series 55 Ratchet Orbit Fiddle Block with a Cam Cleat and Becket (RF56530) boasts 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
  • Up to 20:1 holding power
  • Low profile and compact
  • High performance cleating

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

Specifications:

  • Sheave: 2-5/32" + 1-3/8"
  • Max. Line Size: 3/8"
  • Max Working Load: 550 lbs
  • Breaking Load: 1650 lbs
  • Weight: 8.3 oz
  • 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®

Note: Fiddle sheave has a high load full contact bearing (ie. not ball bearing). Main sheave has two-stage, ball bearing.

Part Numbers for Ronstan Series 55 Ratchet Orbit Block - RF56530

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