Ronstan Series 30 Ball Bearing Orbit Block - Single with Becket and Lashing Head

Series 30 Ball Bearing Orbit Block - Single - Becket - Lashing Head

Ball Bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options.
Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fiber-reinforced composites in the block head, cleat arms and beckets.

Features:

• Lightweight
  
• Highest working load in its class
  
• Secure, versatile and secure attachement
  
• Low profile and compact
  
• Ultra low profile thru-sheave becket
  
• RF35101 accepts RF1850S shackle in both orientations to create a conventional loop top block
  
• Self-lubricating Nylatron sheave and full contact bearing for high dynamic loads

Applications:

• Mainsheet systems and spinnaker sheets on dinghies to 5M(16')
  
• Halyard, vang and backstay applications on boats to 5M(16')
  
• Control line applications on larger yachts

Materials:

• Sheave: High compression strength carbon black Acetal
  
• Ball Bearings: High compression strength Acetal
  
• Frame/Cheeks: Toughened, glass fiber reinforced Nylon
  
• Link: UV stabilized, multi-strand impregnated SK75 Dyneema

Specifications:
=Sheave : 30mm(1-3/16")
Max. Rope : 8mm(5/16")
M.W.L.: 300kg(660lbs)
B. L.: 600kg(1,320lbs)
Weight: 22g(0.8oz)

The Ronstan Series 30 Ball Bearing Orbit Block offers exceptional strength-to-weight ratio, making it ideal for a variety of marine applications. Constructed from high-performance composite reinforced polymer materials, this block features a precision-engineered design that minimizes friction through the optimal number of ball bearings. Its lightweight construction is achieved using fiber-reinforced composites in the block head, cleat arms, and becket, ensuring durability without adding unnecessary weight. The ultra low profile through-sheave becket allows for versatile installation options in tight spaces, while the self-lubricating Nylatron sheave and full contact bearing provide reliable performance under high dynamic loads. This orbit block is designed for secure attachment, accommodating a wide range of control lines and halyards on boats up to 16 feet in length. Its high working load capacity and compact form make it suitable for mainsheet systems, spinnaker sheets, vang, and backstay applications, as well as larger yacht control lines. The sheave is made from high compression strength carbon black acetal, ensuring durability and smooth operation, while the frame and cheeks are crafted from toughened, glass fiber reinforced nylon for added resilience. The link is UV stabilized and impregnated with multi-strand Dyneema, enhancing longevity in harsh marine environments. Measuring approximately 1-3/16 inches in diameter, this block supports ropes up to 5/16 inch and has a maximum working load of 660 pounds with a break load of 1,320 pounds. Weighing only 0.8 ounces, the Ronstan Series 30 Orbit Block combines lightweight performance with high durability, making it an essential component for serious sailors seeking reliable control line management in a compact design.

Features:

• Lightweight construction for easy handling and installation

• Highest working load in its class for reliable performance

• Secure and versatile attachment options for various rigging setups

• Low profile and compact design suitable for tight spaces

• Ultra low profile through-sheave becket for versatile mounting

• Accepts RF1850S shackle in both orientations for flexible rigging

• Self-lubricating Nylatron sheave ensures smooth operation under high loads