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Ronstan Core Blocks

 Ronstan Sailboat Hardware


Ronstan Core Blocks


A balanced design approach incorporating functionality, performance and style makes our Core Blocks™ the right choice for performance cruising or racing applications. 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 & aluminium sheave options, alloy cheeks and stainless fixings complete the durable package.

  • Dynamic and high static load performance
  • Aluminium sheave options
  • Aluminium alloy cheek plates
  • Universal head
  • Suits pre-spliced lines
  • Fully articulated stand-up
Series 45 Core Blocks Ronstan   Series 60 Core Blocks Ronstan  Ronstan Core Blocks 
 Series 45  Series 60  Series 75