Ronstan RF41811 Series 40 Single Cheek All Purpose Block

The Ronstan Series 40 All Purpose Block with single cheek design delivers exceptional performance for cruising and racing applications. This versatile marine block features a self-lubricating Acetal polymer sheave running on polished stainless steel races, providing reliable operation under both dynamic and high static loads.

Key Features:

• Exceptionally high working loads for demanding marine applications
• Self-lubricating sheave for low maintenance and extended service life
• U.V. stabilized Acetal polymer sheave for durability in harsh marine environments
• Grade 316 stainless steel bearing race for corrosion resistance
• Impact and U.V. resistant fiber-reinforced Nylon cheeks
• Alloy cheek plates for strength and reduced weight
• Can be mounted on masts and booms using curved surface adapter
• Stackable with other Series 40 blocks and deck organizers

Applications:

• Mainsheet systems
• Halyard control
• Boom vang
• Spinnaker control lines
• Ideal for off-the-beach catamarans, one design classes, and sportsboats up to 8m (26ft)

Important Note: When stacking blocks, apply no more than 60% of the rated working load to the upper sheave to maintain safe operating parameters.