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Ronstan Series 75 Orbit Block, Single Halyard

Ronstan Series 75 Orbit Block, Single Halyard


$ 331.50 (MRP: $ 390.00)

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Orbit blocks™ are a no-compromise product range developed to meet the demands and expectation 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 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


  • Primary mainsheet, halyard and spinnaker systems on boats to 14m (46ft)
  • Secondary mainsheet, vang blocks on boats to 15m (50ft)
  • Standard and running backstay systems on boats to 12m (40ft)
  • 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

  • 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.
  • Removable pin
  • Bushed to 14mm (9/16")