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Ronstan Series 100 Stand-Up Orbit Block – RF109140

Original price was: $1,052.40.Current price is: $999.95. incl GST


Ronstan Series 100 Stand-Up Orbit Block – RF109140:


  • 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.
  • Lockable swivelling head post.
  • High strength forged shackle.

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 Stand-Up Orbit Blocks™ are supplied with stainless steel padeyes and rubber support bases.


Fully machined Alloy cheek plates. Alloy sheaves with captive ball races. Torlon® needle rollers. Carbon black Acetal ball bearings. Grade 316 stainless steel head post.


Product Specifications
B.L. (kg) 4000
M.W.L. (kg) 2000
Max. Rope diameter (mm) 14
Weight (g) 600
Fastener Ø (mm) 6
Qty. Fasteners 4

Additional information

Weight .7 kg
Dimensions 20 × 10 × 10 cm