Ronstan Series 125 Single Block, Swivel eye for Stand-up

Ronstan Series 125 Single Block, Swivel eye for Stand-up
Item# RF129106A
Regular Price: $1,305.82
Our Price: $1,109.95

Product Description

Ronstan Series 125 Single Block, Swivel eye for Stand-Up


  • 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

  • Sheave Ø - 5 in

  • Max. Rope Ø - 3/4 in.

  • Max. Cable Ø - in

  • Pin Ø- 13/16 in.

  • M.W.L. - 11,020 lb.

  • B. L. - 22,050 lb.

  • Weight - 48 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.


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

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

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


  • Fully machines Alloy cheek plates

  • Alloy sheaves with captive ball races

  • Torlon needle rollers

  • Carbon black Acetal ball bearings