Ronstan Series 40 Ball Bearing Block - Single Upright Lead

The Series 40 Ball Bearing Block - Single Upright Lead is engineered to provide seamless management of halyards and rig sail controls on your vessel. Ideal for marine and boating applications, this lead block ensures smooth operation and longevity, even in the harshest marine environments.

Key Features

• Low-profile design for efficient halyard routing
• Precision molded Acetal sheaves for enhanced performance
• Acetal or Torlon® ball bearings deliver low friction and high durability
• Two-stage ball bearing system maintains consistent performance across all load ranges
• Grade 316 stainless steel load housing offers superior corrosion resistance
• UV stabilized Acetal sheave withstands prolonged exposure to sunlight

Applications

The Series 40 Ball Bearing Block is primarily used for managing halyards at the mast base, ensuring smooth sail adjustments and reliable control. It is suitable for a variety of marine vessels, including sailboats, yachts, and racing boats.

Materials and Construction

Component	Material
Ball Bearings	Acetal
Sheave	UV Stabilized Acetal
Load Housing	Grade 316 Stainless Steel

Why Choose the Series 40 Ball Bearing Block?

Designed specifically for marine applications, the Series 40 Ball Bearing Block offers unmatched reliability and performance. Its robust construction ensures long-lasting use, while the low friction ball bearings facilitate effortless sail control. Whether you're upgrading your current setup or outfitting a new vessel, this lead block is a dependable choice for serious boaters.

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.