Ronstan Series 40 Orbit Single Block With Dyneema Link Head

Ronstan 40mm ball bearing Orbit block with Dyneema link head. The flexible Dyneema Link provides controlled rotation and 0° or 90° orientation. It connects directly to the head of the block rather than to an intermediate head post. This reduces weight and gives the lowest possible profile while allowing full articulation 

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, cleat arms and beckets.

Features
- Lightweight
- Highest working load in its class
- Versatile and secure attachement
- Low profile and compact
- Flexible Dyneema Link provides controlled rotation
- Self-lubricating Acetal sheave and full contact bearing for high dynamic loads

Materials
- Sheave: Carbon fibre reinforced, PTFE impreganated Nylon
- Ball Bearings: High compression strength Acetal
- Stage 2 Bearing - Glass fibre reinforced, MoS2 impregnated Nylon
- Frame/Cheeks: Toughened, glass fibre reinforced Nylon
- Link head is UV stabilised, multi-strand impregnated SK75 Dyneema®

Applications
- Mainsheet systems and spinnaker sheets on dinghies to 5m (16ft)
- Halyard, Vang, Cunningham and backstay applications on boats to 8m (26ft)
- 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 (Series 30 and larger) features high compression grade Acetal ball bearings and a secondary toughened, glass fibre reinforced Nylon 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 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.

Low profile and compact
The flexible Dyneema® Link used in provides 0° or 90° orientation. It connects directly to the head of the block rather than to an intermediate head post. This reduces weight and gives the lowest possible profile while allowing full articulation. 
These blocks are far more compatible with Dyneema®/Spectra® lines, carbon laminate connection points and webbing than traditional blocks with steel loop tops or shackles.