Ronstan Series 150 Orbit Blocks, Single FootThe 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.
Stackable to create double version
Removable cover plate
Sheave Ø - 6 in.
Max. Rope Ø - 3/4 in.
Max. Cable Ø --
Pin Ø - -
M.W.L. - 14330 lb.
B.L. - 31310 lb.
Weight - 45.3 oz
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 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.Features through-hub mounting for maximum strength and can be stacked to create a double (total block load same as single, maximum load on top sheave not to exceed 50% of total block load). Cover plate can be removed for service access without removing t
Mainsheet and genoa sheet systems on boats to 25m (82 ft)
Spinnaker systems, halyards on boats to 28m (92 ft)
Running backstay systems on fractionally rigged boats to 20m (65 ft) or 25m (82 ft) masthead
Fully machine Alloy cheek plates
Alloy sheaves with captive ball races
Torlon needle rollers
Carbon black Acetal ball bearings