Ball Bearing


Series 40 Ball Bearing Block, Fiddle

Fiddle block with universal head


Low friction acetal bearing system.


Cheek cut-outs for easy bearing maintenance.

Captive Lock™ universal head.

Slotted pin shackle eliminates fouled lines.

Low friction, 2-stage ball bearing system.

High static and dynamic load capacity.


Product Specifications
Pin Ø (in)3/16
Max. Rope diameter (in)5/16
M.W.L. (lb)770
Sheave diameter (in)1 9/16 + 15/16
B.L. (lb)2200
Weight (oz)3.2

Product Information

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

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

Technical Information


  • Mainsheet
  • Halyard
  • Vang
  • Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)
  • Typically used in direct 4:1 purchase systems such as mainsheets and boom vangs
  • On larger boats they are used for fine-tune mainsheet tackles, outhauls, cunninghams, checkstays, genoa lead pullers and traveller controls.



  • 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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