Ronstan 20mm - Swivel Block

SKU: 60324

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Ronstan's ball bearing blocks were conceived and engineered for the demands of competitive sailing in all types of boats and have rapidly become the international choice for high performance hardware.



  • Highly efficient, low friction bearing systems for optimum sheeting and trimming performance
  • Precision molded Acetal sheaves running on stainless steel or Torlon® ball bearings provide high performance & low friction and provides a unique 2-Stage bearing system:
  • Stage 1: Under moderate loads, Acetal ball bearings ensure minimum friction
  • Stage 2: Under heavy loads, where deformation of ball bearings alone would result in increased friction, a sliding Acetal bearing on a polished Stainless steel race takes over, maintaining low friction performance

Additional Info

Additional Info

  • Sheave: 20mm (3/4")
  • Max Rope Diameter: 6mm (1/4")
  • Weight: 20g (0.7oz)
  • Max Working Load: 250kg (500lbs
  • Breaking Load: 550kg (1210lbs)
SKU 60324
MPN RF20100
Line Diameter 6mm (1/4")


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