Ronstan Series 20 Double Ball Bearing Block with 2-Axis Shackle Head

Series 20 Ball Bearing Block - Double - 2-Axis Shackle Head

Features:

• Low friction
  
• High static and dynamic load capacity
  
• Lightweight
  
• Precision molded Acetal sheaves running on stainless steel or Torlon ball bearings provide high performance or 90

Applications:

• Dinghy control lines
  
• Dinghy vangs
  
• Cunninghams
  
• Traveller controls

Materials:

• Stainless steel ball bearings
  
• UV Stabilized Acetal sheave
  
• Grade 316 stainless steel load strap and head fitting
  
• Impact and UV resistant, fiber reinforced Nylon cheeks

Specifications:
Sheave : 20mm(3/4")
Max. Rope : 6mm(1/4")
Pin: 4mm(5/32")
M.W.L.: 350kg(770lbs)
B. L.: 700kg(1,540lbs)
Weight: 42g(1.5oz)

The Ronstan Series 20 Double Ball Bearing Block (Part Number RF20202) is designed for high-performance marine applications requiring smooth operation and reliable load handling. Featuring precision-molded Acetal sheaves running on stainless steel or Torlon ball bearings, this block offers low friction and exceptional efficiency. Its lightweight construction combined with high static and dynamic load capacities makes it an ideal choice for controlling dinghy lines, vangs, cunninghams, and traveler controls. Constructed with durable materials such as Grade 316 stainless steel for the load strap and head fitting, impact and UV-resistant fiber-reinforced nylon cheeks, and UV-stabilized Acetal sheaves, it withstands harsh marine environments effectively. The sheave size measures 20mm (3/4 inch), suitable for ropes up to 6mm (1/4 inch), and the block has a maximum working load of 770 pounds with a breaking load of 1,540 pounds. Weighing only 1.5 ounces, the Ronstan Series 20 is lightweight yet robust, ensuring minimal weight addition without compromising strength. Its compact design and premium materials make it a reliable component for boat control systems that demand precision, durability, and ease of use. Whether used in racing or cruising boats, this double sheave block provides smooth, efficient operation for demanding marine tasks, ensuring longevity and consistent performance over time.

Features:

• Low friction: Precision ball bearings ensure smooth operation

• High load capacity: Supports static and dynamic loads up to 770 lbs

• Lightweight: Weighs only 1.5 ounces for ease of handling

• Durable materials: Constructed with stainless steel, UV-stabilized Acetal, and fiber-reinforced nylon

• Versatile application: Suitable for dinghy control lines, vangs, cunninghams, and traveller controls