Ronstan Series 40 Fiddle Block

Ronstan Series 40 Fiddle Block
Item# RF40500
Regular Price: $57.59
Our Price: $48.95

Product Description

Ronstan Series 40 Fiddle Block


  • Low friction Acetal or Torlon bearing system

  • Lightweight

  • Cheek cut-outs for easy bearing maintenance

  • Slotted pin shackle eliminates fouled lines

  • Low friction, 2-stage ball bearing system

  • Sheave 1 9/16 + 15/16 in.

  • Max. Rope Ø - 5/16 in.

  • Max. Cable Ø - -

  • Pin Ø - 3/16 in.

  • M.W.L. 770 lb

  • B.L. 2200 lb

  • Weight - 3.2 oz.

    Product Information

    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


  • Mainsheet

  • Halyard

  • Vang

  • Spinnaker control lines on off-the-beach catamarans, one design classes and sports boats up to 8m 926 ft)

  • 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 stabilized Acetal sheave

  • UV stabilized Acetal sheave

  • Grade 316 stainless steel load strap and head fitting