Ball Bearing


Series 180 Foot Orbit Block™, Single

Single sheave foot block


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 cover plate.


Product Specifications
B.L. (kg)19500
M.W.L. (kg)9750
Max. Rope diameter (mm)22
Weight (g)2075
Fastener Ø (mm)16 & 20
Qty. Fasteners3

Product Information

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.

The bottom hub section is machined from solid alloy for maximum integrity of the load bearing structure. The top cover plate protects the sheave against impact, prevents dirt and grit from entering the hub area, and can be removed for service access.

Technical Information


  • Mainsheet and genoa sheet systems on boats to 31m (12ft).
  • Spinnaker systems, halyards on boats to 33m (18ft).
  • Running backstay systems on boats to 32m (15ft).



  • Fully machined Alloy cheek plates.
  • Alloy sheaves with captive ball races.
  • Torlon® needle rollers.
  • Torlon® ball bearings


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