Product Details
30 Series Orbitblock™ Ball Bearing Shave Triple Utility Block with Shackle for 5/16" D Lines by Ronstan®. 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.
Specifications
| Breaking Load: 2430 lb |
| Maximum Line Diameter: 5/16" |
| Maximum Working Load: 1210 lb |
| Sheave Diameter: 1-3/16" |
| Weight: 2.8 oz |
Features
- Lightweight
- Highest working load in its class
- Secure, versatile and secure attachement
- Low profile and compact
- 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 yachts
- Sheave: High compression strength carbon black Acetal
- Ball Bearings: High compression strength Acetal
- Frame/Cheeks: Toughened, glass fibre reinforced Nylon
- Link: UV stabilised, multi-strand impregnated SK75 Dyneema®
Lightweight
Kilogram for kilogram of working load BB Orbit Blocks™ are the world's lightest. To gain peak performance, Ronstan engineered out the heavy steel load straps, head post, shackle and cleating accessories. Through extensive research and development, Ronstan 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.
Multi-sheave blocks have only single intermediate cheeks and an ultra-light and efficient head arrangement. Other brands just link together their single blocks with a heavy steel channel across the top of the block, with unnecessary extra cheeks adding extra weight and bulk not found in Ronstan Orbit Blocks™.
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 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.
Simple, versatile and secure attachment
The single block is easily lashed to an attachment point, and can also accept Dyneema® Links and shackles for a variety of efficient attachment alternatives. The Dyneema® Link used in multi-sheave blocks is easily fitted and secured by a removable pin. The Dyneema® Link can also be removed and replaced by a shackle, custom lashing or strop.
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.
Low profile and compact
The two way head in the single lashing block allows for alignment at 0° or 90° orientation, while the single swivel block allows for full articulation.
The flexible Dyneema® Link used in multi-sheave blocks 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.
Beckets have been carefully designed to minimise height.
High performance cleating
Ronstan BB Orbit Blocks™ feature strong, lightweight fibre-reinforced cleat arms optimised at the required cleating angle. Race-proven, carbon-fibre reinforced Ronstan C-Cleats give secure rope holding with low entry and exit efforts, and are fitted with fairleads for fast action from any angle.
RF35100 & RF35100D have stainless steel head posts & shackles.
The sailboat hardware market and the architectural rigging market are worlds apart, but in Australia they're both dominated by one powerhouse player. Ronstan® end-to-end design, manufacture and distribution operation has grown to become the only serious competitor. Ronstan head office in Melbourne, Australia is home to Ronstan state-of-the-art design and manufacturing facilities, and Ronstan advanced warehousing and global distribution system. Ronstan home market is further supported by sales offices in Sydney, Brisbane and Perth. Internationally, Ronstan one of the top three sailboat hardware brands in the world, instantly recognised and respected in 45 countries. Ronstan passionate team has worked tirelessly to develop export markets, establishing manufacturing facilities in Denmark and Indonesia and sales offices and distribution facilities in the United States - all the while building strong relationships with Ronstan distribution partners around the world.