The Ronstan Series 55 Ball Bearing Orbit Double Block RF55210 delivers exceptional strength and ultra-low friction in a compact, lightweight package. Featuring a 2-stage orbital ball bearing system, Dyneema rope link head, and stainless steel swivel shackle, it's ideal for high-performance mainsheet, spinnaker, and control line applications on dinghies and small keelboats.
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)
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
