Ball Bearing Blocks

 Series 50mm


  •  Low friction, 2-stage ball bearing system
  •  High static and dynamic load capacity
  •  Lightweight
  •  Cheek cut-outs for easy bearing maintenance

  Product No. Desc. Sheave ØMax. Rope ØMax. Cable ØPin ØM.W.L.B. L.Weight
 RF50100 RF50100 Single, universal head 5012-5.05001500117
 RF50101 RF50101 Single, loop head 5012--500150097
 RF50110 RF50110 Single, becket, universal head 5012-5.05001500133
 RF50200 RF50200 Double, universal head 5012-6.08002000254
 RF50500 RF50500 Fiddle, universal head 54 + 3410-5.05001500166
 RF50530 RF50530 Fiddle, becket, adjustable cleat, universal head 54 + 3410-5.05001500334


Sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.


  • Mainsheet
  • Spinnaker sheets
  • Halyards and other primary applications on boats up to 10m (33ft)