Ronstan 55 mm Series 55 Ball Bearing Orbit Triple Block
Item #:
755835
Brand:
Ronstan
Model #:
RF55310
Shipping Weight:
0.55
Lbs.
List Price:
$130.53

$110.95

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