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Ronstan Orbit BB Blocks
Ronstan Ball Bearing Orbit Blocks have been engineered to achieve the highest possible strength-to-weight ratio, using composite reinforced polymer materials and a Dyneema link attachment instead of metal components.
The unique orbital version of our 2-stage ball bearing system maximises the available bearing surface and positions recirculating ball bearings exclusively within the loaded area of the sheave. A secondary full-contact bearing maintains low friction across the full working load range.
The Dyneema link, realised in high-grade SK75 fibre, is easily fitted and retained securely by a moulded retainer clip. The flexible link allows limited articulation in a 0° or 90° orientation, while swivel head models with stainless steel shackles provide full rotation and ultimate durability.
Orbit Blocks are fitted with our carbon-fibre reinforced C-Cleat for secure rope holding with low entry and exit efforts, and fairleads for fast action from any angle. Cleat arms have a wide range of adjustment and calibration marks for setting your preferred cleating angle.
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