Adria Marine | Ronstan blocks - 30 mm series

30 mm series

Browse our category "Series 30 mm" to find all the blocks of Ronstan, 30 mm that we deal in our shop. There are two versions: the Orbit and the Utlity. Everything you need for the boat can be found on our website at or at our Adria Marine shop. Over 10,000 products for boating in the catalog. Fast shipping throughout Italy and the world.

Single block series 30 orbit
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The ball bearing Orbit Blocks ™ boast the highest ratio of strength-to-weight available. This is possible thanks to polymeric materials reinforced entirely composite and multiple mounting options.
Their precision design provides the optimum number of ball bearings to reduce friction to a minimum, while the weight reduction is achieved through the use of composite materials reinforced with fibres in the head of the block, in the arms of the cleat and becket.
30 mm series single swivel block
Ronstan 30mm series single swivel block. The low-friction 2-stage ball bearing system offers consistent performance across the entire workload range. High static and dynamic load capacity. Light weight Versatile head accessories.
Double block series 30 mm orbit
Last items in stock
Ronstan 30 mm Orbit series double block, ideal for application in dinghy circuits. 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 optimal 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.