Ronstan 30mm Ball Bearing Block

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  • Lightweight
  • Highest working load in its class
  • Secure, versatile attachment
  • Ultra low profile thru-sheave becket
  • Low friction 2-stage ball bearing system provides consistent performance over the full working load range
  • SP versions feature a Nylatron® sheave suitable for both rope and wire
  • Accepts RF1850S shackle in both orientations to create a conventional loop top block


Sheave Ø 1 3/16 in.
Max. Rope Ø 5/16 in.
Max. Cable Ø - in
Pin Ø - in.
M.W.L. 660 lb.
B. L. 1320 lb.
Weight 0.8 oz.