2020 Ronstan Sailboat Hardware Catalogue - VIEW CATALOGUE

Orbit Blocks


Series 100



  • The highest strength-to-weight ratio
  • Minimal friction loss, especially when working at high loads
  • Captive ball bearings for side thrust loads
  • Totally reliable and trouble free performance
  • Simplicity of design and construction to facilitate maintenance and servicing
  • Elegant, functional styling and finish.
  • Removable pin
  • Bushed to 16mm (5/8") diameter
Contact us for stock availability

$ 669.70

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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.
Halyard blocks are used in applications with a fixed line entry-angle to keep lines close to the deck as they lead aft to organisers and winches. Halyard block has a removable pin for attachment to deck padeyes or mast collar

Sheave 100 mm
Max. Rope 14 mm
Max. Cable - mm
Pin 12.0* mm
M.W.L.3000 kg
B. L.6500 kg
Weight391 g
  • Primary mainsheet, halyard and spinnaker systems on boats to 16m (53ft)
  • Secondary mainsheet, vang blocks on boats to 18m (60ft)
  • Backstay systems on boats to 14m (46ft)
  • General control line and lead block applications on larger yachts
  • Fully machined Alloy cheek plates
  • Alloy sheaves with captive ball races
  • Torlon needle rollers
  • Carbon black Acetal ball bearings