Ronstan Series 70 Blocks

Ronstan Series 70 Blocks offer the highest working weight in it's class. The orbital ball-bearing arrangement gives the largest possible Bearing race diameter. This maximises load performance. 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 floating sheave and Bearing system is supported by a fibre-reinforced load frame. The design was computer modelled and optimised using stress analysis. The Dyneema® Link is produced from FSE Robline SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the Block to the load point.