RF40100 - Ronstan Series 40 Ball Bearing Block - Single - Universal Head

• 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

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

• 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

The Ronstan Series 40 Ball Bearing Block, part number RF40100, is a single-sheave block designed for applications requiring efficient line management and low friction. This component is suitable for marine and rigging professionals managing control lines on smaller vessels, specifically off-the-beach catamarans, one design classes, and sportsboats up to 8 meters (26 feet). Its two-stage ball bearing system, utilizing Acetal or Torlon� bearings, ensures consistent performance across varying load conditions. The block features a Captive Lock� universal head, which offers flexibility by allowing the head to be fixed in two planes or to swivel freely, adapting to different rigging setups. Constructed with UV-stabilized Acetal sheaves, fiber-reinforced Nylon cheeks, and a Grade 316 stainless steel load strap, it provides durability and resistance to environmental factors. This block addresses the need for reliable, low-maintenance hardware in demanding marine environments, supporting applications such as mainsheet, halyard, vang, and spinnaker control lines.