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Ronstan Series 40 BB Double 2 Axis Shackle Head Block

Cat.No:  6254 Sup. No:  RF40200

Availability: In stock

RRP: $79.98

our price $73.95
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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.

Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required


  • Low friction Acetal or Torlon® bearing system
  • Lightweight
  • Cheek cut-outs for easy bearing maintenance
  • Slotted pin shackle eliminates fouled lines
  • Two way head post
  • Low friction, 2-stage ball bearing system
  • High static and dynamic load capacity
  • Lightweight
  • Cheek cut-outs for easy bearing maintenance


  • Sheave: 40 mm
  • Max. Rope: 10 mm
  • Max. Cable: - mm
  • Pin: 5.0 mm
  • M.W.L. 500 kg
  • B. L. 1200 kg
  • Weight: 134 g


  • Mainsheet
  • Halyard
  • Vang
  • Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)


  • Acetal ball bearings
  • UV stabilised Acetal sheave
  • Grade 316 stainless steel load strap and head fitting
  • Impact and UV resistant, fibre reinforced Nylon cheeks

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