Ronstan Series 40 Block - RF41510

The Ronstan Series 40 Fiddle Block (RF41510) is made from precision moulded Acetal sheaves running on Acetal or Torlon® ball bearings to provide high performance and low friction. The 2-stage ball bearing system provides consistent performance over the full load range and the captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required.

Features:

• Low friction, 2-stage ball bearing system
• High static and dynamic load capacity
• Lightweight
• Cheek cut-outs for easy bearing maintenance
• Captive Lock™ universal head
• Slotted pin shackle eliminates fouled lines

Applications:

• 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, backstays, genoa lead pullers and traveller controls

Specifications:

• Safe working load: 880 lb (400 kg)
• Breaking load: 2200 lb (1000 kg)
• Weight: 3.5 oz (98 g)
• Sheave diameter: 1-9/16" & 15/16" (40 mm & 24 mm)
• Maximum line size: 5/16" (8 mm)
• Materials:
  • U.V. stabilized Acetal sheaves
  • Grade 316 stainless steel bearing race
  • Grade 316 stainless steel load strap and head fitting
  • Impact and UV resistant, fiber reinforced Nylon cheeks