2022 Ronstan Marine Catalogue - VIEW CATALOGUE

Orbit Blocks™


Series 180



  • The highest strength-to-weight ratio
  • Minimal friction loss, especially when working at high loads
  • Totally reliable and trouble free performance
  • Simplicity of design and construction to facilitate maintenance and servicing
  • Elegant, functional styling and finish.

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Orbit blocks are a no-compromise product range developed to meet the demands and expectations of the very dedicated and increasingly professional racing sailor. Side cheeks incorporating head structure and hub are precision machined as a single part from solid alloy, leaving material only where it contributes to the load carrying capacity of the block and eliminating the need for additional fasteners. The Orbit sheave has captive acetal or Torlon® ball bearings for side thrust loads, eliminating the need for side retainer plates. This reduces weight and allows for a wider bearing surface that can accommodate longer Torlon® needles – achieving a substantially higher strength-to-weight ratio.

For comprehensive installation instructions see: Lashing Block Installation Instructions

Sheave Ø180 mm
Max. Rope Ø26 mm
Max. Cable Ø mm
Pin Ø mm
M.W.L.12000 kg
B. L.30000 kg
Weight2450 g
  • Mainsheet and genoa sheet systems on boats to 31m (102ft)
  • Spinnaker systems, halyards on boats to 33m (108ft)
  • Running backstay systems on boats to 32m (105ft).
  • Fully machined Alloy cheek plates
  • Alloy sheaves with captive ball races
  • Torlon® needle rollers
  • Torlon® ball bearings