The Ronstan RF1759 50mm Acetal Sheave is a robust, high-performance pulley wheel designed for marine rigging systems, block repairs, and custom installations. With a 50mm diameter and 15.6mm width, it is ideal for larger rope applications where durability and smooth operation are essential.

Manufactured from UV-stabilised acetal, this sheave provides excellent resistance to wear, impact, and harsh marine environments. Its self-lubricating properties deliver low-friction performance without the need for bearings, making it a reliable and low-maintenance solution for sailing systems.

Suitable for ropes up to approximately 14mm diameter, the RF1759 is commonly used on dinghies, keelboats, and cruising yachts for halyards, sheets, and general-purpose pulley setups.

Key Features

• 50mm acetal sheave for higher load and larger rope systems
• Self-lubricating material for smooth, low-friction operation
• UV-resistant construction for long service life in marine conditions
• High impact and wear resistance for durability
• Suitable for rope-based pulley systems and replacements
• Lightweight, maintenance-free design
• Trusted Ronstan marine hardware quality

Specifications

• Outer Diameter: 50mm
• Width: 15.6mm
• Bore Diameter: 8.1mm
• Max Rope Diameter: approx. 14mm
• Weight: approx. 22g
• Material: UV-stabilised acetal
• Bearing Type: Solid (plain bearing)
• Application: General-purpose sheave for marine rigging systems

Why Choose the Ronstan RF1759? 

For New Zealand sailors, reliable rigging components are essential for safe and efficient sailing. The RF1759 provides a durable, cost-effective replacement sheave for larger pulley systems, ensuring smooth line handling and reduced friction.

Its larger size makes it ideal for heavier-duty applications, including cruising yachts and high-load control systems, while its simple design ensures long service life in NZ coastal and offshore conditions.