Ronstan Series 40 All Purpose Block - Single Cheek for Sailing and Rigging

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 a versatile and durable solution designed for both cruising and racing applications. Built with high-quality materials, this block is engineered to handle exceptionally high working loads while offering low maintenance and a long service life. Its self-lubricating sheave made from Acetal polymer runs smoothly on polished stainless steel races, ensuring reliable performance under various load conditions.

Ideal for use with sheets, halyards, and control lines, this all-purpose (AP) block is suitable for mounting on masts and booms. The curved surface adapter allows for easy installation, and the design accommodates stacking to create a double block configuration*though it is recommended not to exceed 60% of the rated working load on the upper sheave. The Ronstan Series 40 blocks are compatible with Ronstan deck organizers, making them a flexible addition to your sailing hardware.

Constructed with impact and UV-resistant fiber-reinforced nylon cheeks, and equipped with a grade 316 stainless steel bearing race, this block offers excellent durability against harsh marine environments. The alloy cheek plates further enhance its robustness. Whether you're managing mainsheets, halyards, vangs, or spinnaker control lines on off-the-beach catamarans, one-design classes, or sportsboats up to 26 feet, the Ronstan Series 40 All Purpose Block delivers consistent, high-performance results.

Designed for easy installation and reliable operation, this block is a dependable choice for sailors seeking a high-quality all-purpose sheave solution. Its compact size and lightweight design make it suitable for a wide range of sailing rigs, ensuring your lines run smoothly and efficiently every time.

Features:
* Exceptionally high working loads for demanding sailing applications
* Low maintenance design with long service life
* Self-lubricating Acetal polymer sheave for smooth operation
* Polished stainless steel bearing race for durability
* Impact and UV-resistant fiber-reinforced nylon cheeks
* Can be mounted on masts and booms using the curved surface adapter
* Stackable design compatible with Ronstan Series 40 deck organizers