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Ronstan Series 45 Core Single Halyard Block

Cat.No:  6464 Sup. No:  RF44188

Availability: In stock

RRP: $92.96

our price $82.95
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Core Blocks™ are a true all round solution.

A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads.

Acetal sheave, alloy cheeks and stainless fixings complete the durable package.

For reliability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.


  • High dynamic and static load capacity
  • Efficient 2 stage bearing system
  • Ball bearings to counteract side thrust loads
  • Class leading performance and sleek, contemporary styling
  • Central hub hole can be used as a becket take-off or tie-up point
  • Incorporates a low profile swivel head fork
  • Features a removable screw pin for attachment to padeyes
  • Suitable for 12mm (1/2) diam. mast collar post


  • Sheave Ø: 45mm
  • Max. Rope Ø: 12mm
  • Pin Ø:5mm
  • M.W.L.: 700kg
  • B.L.: 1400kg
  • Weight: 121g

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