Ronstan Series 40 Ball Bearing Block - Single Upright Lead

Series 40 Ball Bearing Block - Single Upright Lead

Lead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers. Precision molded Acetal sheaves running on Acetal or Torlon ball bearings provide high performance low friction. The 2-stage ball bearing system provides consistent performance over the full load range.

Applications:

• Typically used for halyards at the mast base.

Materials:

• Acetal ball bearings
• UV stabilized Acetal sheave
• Grade 316 stainless steel load housing

The Ronstan Series 40 Ball Bearing Block - Single Upright Lead is a high-performance solution designed for leading halyards or other rig sail controls back to cleats or jammers on sailboats. Its low profile construction makes it ideal for applications where space is limited, providing reliable and smooth operation under various load conditions. The block features precision molded Acetal sheaves that run on high-quality Acetal or Torlon ball bearings, ensuring low friction and efficient movement. The innovative 2-stage ball bearing system maintains consistent performance across the full load range, reducing wear and extending service life. Made with durable materials, the load housing is constructed from corrosion-resistant Grade 316 stainless steel, and the UV stabilized Acetal sheave ensures longevity even in harsh marine environments. This combination of materials and engineering makes the Ronstan Series 40 an excellent choice for mast base halyard applications and other rigging needs. Easy to install and maintain, this ball bearing block provides smooth operation and dependable performance, making it a reliable component for serious sailors seeking durability and efficiency in their rigging hardware.

Features:

• Low profile design ideal for space-constrained applications

• Precision molded Acetal sheaves for smooth operation

• Ball bearings made from Acetal or Torlon for low friction

• 2-stage ball bearing system for consistent performance over load range

• Constructed from Grade 316 stainless steel for corrosion resistance

• UV stabilized Acetal sheave for durability in harsh environments

• Suitable for halyards at the mast base and similar rigging applications