Ronstan RF64251 Series 60 Double Block

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Ronstan RF64251 Series 60 Double Block

Ronstan RF64251 Series 60 Double Block. A tuned two-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. 

U.V. stabilised Acetal sheaves, Alloy cheek plates and cleat arms, high compression strength carbon black Acetal ball bearings, 316 stainless steel shackle, post and hub, 15-5PH stainless steel pad eye and snap shackle and a fibre reinforced composite cleat. 

Ideal for mainsheet, halyard and spinnaker sheet applications on boats up to 11m. 


  • Class leading performance and sleek, contemporary styling
  • Excellent dynamic and high static load performance
  • Less than half the friction of the nearest competitor
  • *Total block load. Maximum load on top sheave not to exceed 50% of total block load.
Sheave Ø 60 mm
Max. Rope Ø 12 mm
Max. Cable Ø - mm
Pin Ø - mm
M.W.L. 1000** kg
B. L. 2000** kg
Weight 370 g