Ronstan Series 30 Orbit Single Swivel Shackle Head - Becket Option

Ronstan series 30 ball bearing Orbit swivel shackle head block with optional through sheave becket.

Ball bearing Orbit blocks™ boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. 
Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head.

Features
- Lightweight
- Highest working load in its class
- Secure, versatile and secure attachment
- Low profile and compact
- Shackle swivel head 
- Becket takes upto 6mm line, add a Dyneema Link for large ropes
- Self-lubricating Acetal sheave and full contact bearing for high dynamic loads

* Important - Load on becket not to exceed 25% of block load. ie. MWL 140Kg and BL. 280Kg. Suitable for a 6:1 system at rated block load.

Materials
- Sheave: High compression strength carbon black Acetal
- Ball Bearings: High compression strength Acetal
- Frame/Cheeks: Toughened, glass fibre reinforced Nylon
- Link: 316 Stainless steel shackle

Applications
- Mainsheet systems and spinnaker sheets on dinghies to 5m (16ft)
- Halyard, vang and backstay applications on boats to 5m (16ft)
- Control line applications on larger boats

Lightweight
Kilogram for kilogram of working load BB Orbit Blocks™ are the world’s lightest. To gain peak performance, we engineered out the heavy steel load straps, head post, shackle and cleating accessories. Through extensive research and development, we replaced virtually all metal components with high-tech polymers and fibre equivalents.
Weight and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result? The lowest weight possible. 

Highest working load in its class
The proven Ronstan 2-stage bearing system features high compression grade Acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range. 
The sheave and bearing system is supported by a fibre-reinforced load frame, computer modelled and optimised using advanced stress analysis methods. The Dyneema® Link, used in multi-sheave blocks, is produced from high spec SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.