Ronstan Series 40 All Purpose Block - Single Cheek

Series 40 All Purpose Block - Single Cheek

Features:

• Exceptionally high working loads
• Low maintenance, long service life
• Self-lubricating sheave

All purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.Can be mounted on masts and booms using the curved surface adapter. Can be stacked to create a double version, but no more than 60% of the rated working load should be applied to the upper sheave. Stackable with Ronstan Series 40 deck organizers.

Applications:

• Mainsheet
• Halyard
• Vang
• Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)

Materials:

• U.V. stabilised Acetal sheaves
• Impact and U.V. resistant, fiber reinforced Nylon cheeks
• Grade 316 stainless steel bearing race
• Alloy cheek plates

The Ronstan Series 40 All Purpose Block - Single Cheek is an versatile and durable solution designed for a wide range of sailing applications. Crafted with high-quality materials, this block features a self-lubricating Acetal polymer sheave mounted on polished stainless steel races, ensuring smooth operation under both dynamic and static loads. Its robust construction includes impact and UV-resistant fiber-reinforced nylon cheeks and alloy cheek plates, making it suitable for demanding marine environments. Ideal for sheets, halyards, and control lines, the Series 40 block provides reliable performance for cruising and racing vessels up to 26 feet in length. Its design allows for easy mounting on masts and booms using a curved surface adapter and offers stacking capability to create double blocks, with a caution to limit load on the upper sheave to 60% of the rated working load. This feature makes it adaptable to various rig configurations, including spinnaker control lines and vang systems.

Constructed for longevity and minimal maintenance, the Ronstan Series 40 block delivers high working loads and long service life, making it a trusted choice for sailors seeking dependable equipment. Whether used on off-the-beach catamarans, one-design classes, or sportsboats, this all-purpose block ensures efficient line management and durability in marine conditions, supporting performance and safety at sea.

Features:

• Exceptionally high working loads for demanding applications

• Low maintenance design with long service life

• Self-lubricating Acetal polymer sheave for smooth operation

• Impact and UV-resistant fiber-reinforced nylon cheeks

• Polished stainless steel bearing race for durability

• Can be mounted on masts and booms using curved surface adapter

• Stackable design compatible with Ronstan Series 40 deck organizers

• Suitable for sheets, halyards, vang, and spinnaker control lines

• Designed for vessels up to 26 feet in length