Ronstan Series 40 Ball Bearing Block - Single with Universal Head (Part RF40100)

Series 40 Ball Bearing Block - Single - Universal Head

Sheaves running on Acetal or Torlon ball bearings provide high performance universal head can be fixed in either of two planes, or free to swivel as required.

Features:

• Low friction Acetal or Torlon bearing system
  
• 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(26')

Materials:

• U.V. Stabilized Acetal sheaves
  
• Acetal ball bearings
  
• Impact and U.V. resistant, fiber reinforced Nylon cheeks
  
• Grade 316 stainless steel load strap and head fitting

Specifications:
Sheave : 40mm(1-9/16")
Max. Rope : 10mm(7/16")
Pin : 5mm(3/16")
M.W.L.: 350kg(770lbs)
B. L.: 1,000kg(2,200lbs)
Weight: 70g(2.5oz)

The Ronstan Series 40 Ball Bearing Block features a high-performance design suitable for various sailing applications. Equipped with sheaves running on Acetal or Torlon ball bearings, this block delivers low friction and smooth operation, ideal for controlling mainsheets, halyards, vangs, and spinnaker lines on off-the-beach catamarans, one-design classes, and sportsboats up to 26 feet. Its lightweight construction and durable materials make it a reliable choice for demanding maritime environments. The universal head can be fixed in either of two planes or allowed to swivel freely, providing versatile rigging options for sailors seeking optimal line control and ease of use.

Features:

• Low friction Acetal or Torlon bearing system ensures smooth operation

• Lightweight design reduces load on rigging components

• Cheek cut-outs facilitate easy bearing maintenance

• Captive Lock universal head for secure line management

• Slotted pin shackle prevents fouled lines during operation