Ronstan 20mm High Load Ball Bearing Block Lashing Head - Single

PRODUCT INFORMATION

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.

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. 
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. 

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 yachts

MATERIALS

• Sheave: High compression strength carbon black Acetal
• Ball Bearings: High compression strength Acetal
• Frame/Cheeks: Toughened, glass fibre reinforced Nylon

FEATURES

• Lightweight
• Highest working load in its class
• Secure, versatile and secure attachement
• Low profile and compact
• Ultra low profile thru-sheave becket.
• Low friction 2-stage ball bearing system provides consistent performance over the full working load range.

SPECIFICATIONS

• Sheave Ø 20 mm
• Max. Rope Ø 6 mm
• Max. Cable Ø - mm
• Pin Ø - mm
• M.W.L. 300 kg
• B. L. 900 kg
• Weight 14 g