Ronstan Orbit Series 125 Single Foot Block

Ronstan Orbit Series 125 Single Foot Block
Item# RF129151
Regular Price: $835.24
Our Price: $709.95

Product Description

Ronstan Orbit Series 125 Single 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.

  • Stackable to create double version

  • Removable cover plate

    Sheave Ø - 5 in.

    Max. Rope Ø - 5/8 in.

    Max. Wire Ø - in.

    Pin Ø - in.

    Max. Working Load - 11020 lb

    B. L. - 23370 lb

    Weight - 23.5 oz

    Product Information

    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.

    Head posts of swivel blocks can be locked at 0 or 90 degrees.


  • Primary mainsheet blocks on boats to 18m (60ft)

  • Secondary mainsheet blocks, spinnaker systems, halyards on boats to 22m (72ft)

  • Running backstay systems on boats to 16m (53ft)


  • Fully machined Alloy cheek plates

  • Alloy sheaves with captive ball races

  • Torlon® needle rollers

  • Carbon black Acetal ball bearings

  • Forged grade 17-4PH stainless steel shackles

  • Grade 316 stainless steel head post