Barton Size 4 58mm Plain Bearing Pulley Upright Block

The Size 4 58mm Plain Bearing Pulley Upright Block is a robust and reliable component designed for larger cruising and racing yachts. Engineered with precision and built to withstand harsh marine environments, this pulley block ensures smooth and efficient sail handling.

Key Features

• Sheave Size: 58mm (2 5/16″)
• Construction: High-grade molded side plates, through-bolted and riveted for enhanced strength and security
• Material: Marine grade 316 stainless steel for all load-bearing components and interior frame
• Sheave Options: Available in both plain and ball-bearing variants
• Rope Compatibility: Suitable for ropes up to 12mm (7/16″)

Durable Marine-Grade Construction

Crafted from marine grade 316 stainless steel, the Size 4 pulley block offers exceptional resistance to corrosion and fatigue, making it ideal for the demanding conditions of marine environments. The high-grade molded side plates are secured with through-bolts and rivets, ensuring long-lasting durability and reliability.

Versatile Sheave Options

Choose between plain and ball-bearing sheaves to suit your specific sailing needs. The plain bearing option provides a simple and cost-effective solution, while the ball-bearing variant offers reduced friction and smoother operation, enhancing overall sail performance.

Compatibility and Integration

The Size 4 Pulley Upright Block is fully compatible with our ball-bearing mainsheet traveler system, allowing for seamless integration into your yacht's sail handling setup. This compatibility ensures optimal performance and ease of use, whether you're cruising or racing.

Technical Specifications

Feature	Specification
Sheave Diameter	58mm (2 5/16″)
Material	Marine Grade 316 Stainless Steel
Rope Capacity	Up to 12mm (7/16″)
Construction	High-grade molded side plates, through-bolted and riveted
Sheave Types	Plain and Ball-Bearing

Installation and Usage

Installing the Size 4 Pulley Upright Block is straightforward, thanks to its rugged design and compatibility with existing mainsheet traveler systems. Whether you are upgrading your current setup or installing a new sail handling system, this pulley block ensures reliable performance and ease of use.

Download the Quick Guide (PDF) for detailed installation instructions and maintenance tips.

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.