RONSTAN Serie 150 Orbit Blocks REF159100A

Orbit Blocks serie 100 Ref 159100A

Single block, becket

  • 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.

1.503.90  VAT not included

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.


Sheave Ø 150 mm
Max. Rope Ø 24 mm
Max. Cable Ø mm
Pin Ø 16.0 mm
M.W.L. 9000 kg
B. L. 18000 kg
Weight 2310 g



  • Mainsheet and genoa sheet systems on boats to 25m (82ft)
  • Spinnaker systems, halyards on boats to 28m (92ft)
  • Running backstay systems on fractionally rigged boats to 20m (65ft) or 25m (82ft) masthead


  • Fully machined Alloy cheek plates
  • Alloy sheaves with captive ball races
  • Torlon® needle rollers
  • Carbon black Acetal ball bearings
Weight 2 kg
Dimensions 30 × 10 × 20 cm
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