Description
Ronstan Series 55 Orbit Cheek Block – Lightweight and High-Performance Sailing Accessory for Maximum Load Efficiency
Lightweight
Kilogram for kilogram of working load, BB and RT Orbit Bozzelli™ are the world’s lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimizes 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 bozzello has a through-sheave becket arrangement. The result? The lowest weight possible.
Highest working load in its class
The orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximizes load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This provides minimum friction across the full working load range. The floating sheave and bearing system are supported by a fibre-reinforced load frame. The design was computer modeled to be stress optimized.
Weight: Lightweight for optimal performance
Working Load Limit: Highest in its class
Bearing System: 2-stage featuring acetal ball bearings
Design: Computer modeled and stress optimized
Configuration: Available in various block configurations
Application: Suitable for high-performance sailing applications
| Pulley diameter | 55mm |
|---|---|
| Max rope diameter | 10mm |
| Max working load | 500kg |
| Breaking load | 1000kg |
| C | 258mm |
| Fasteners | 5mm |
Applications
Mainsheet systems on dinghies, sportsboats and small keelboats to 9m (3ft).
Halyard, Vang and Backstay application 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.
Sheave: Carbon fibre reinforced, PTFE impregnated Nylon.
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