Ronstan Series 40 All Purpose Block - Single - Stand Up

The Series 40 All Purpose Block - Single - Stand Up is the ideal choice for sailors seeking reliability and performance in their rigging systems. Designed to handle both dynamic and static loads with ease, this versatile block ensures smooth operation and longevity, making it perfect for a variety of marine applications.

Key Features

• Exceptional Load Capacity: Capable of handling up to 400kg (880lbs) with a breaking load of 800kg (1,760lbs).
• Low Maintenance: Engineered for long service life with minimal upkeep required.
• Self-Lubricating Sheave: Acetal polymer sheaves reduce friction and wear, ensuring smooth performance.
• Captive Lock™ Universal Head: Offers versatile mounting options with the ability to fix in two planes or allow free swiveling as needed.
• Easy Installation: Mount using 2 x 5mm (3/16") fasteners (not included) for a secure fit.

Ideal Applications

• Mainsheet control
• Halyard adjustments
• Vang operations
• Spinnaker control lines for off-the-beach catamarans, one design classes, and sportsboats up to 8 meters (26 feet)

Premium Materials

• U.V. Stabilized Acetal Sheaves: Resistant to ultraviolet rays and environmental stress, ensuring durability.
• Fiber Reinforced Nylon Cheeks: Impact and U.V. resistant for enhanced strength and longevity.
• Grade 316 Stainless Steel Bearing Race: Offers superior corrosion resistance in marine environments.
• Grade 316 Stainless Steel Load Strap and Head Fitting: Ensures reliable performance and resistance to saltwater corrosion.

Technical Specifications

Specification	Details
Sheave Diameter	40mm (1-9/16")
Maximum Rope Diameter	10mm (7/16")
Maximum Working Load (M.W.L.)	400kg (880lbs)
Breaking Load (B.L.)	800kg (1,760lbs)
Weight	72g (2.5oz)

Why Choose the Series 40 All Purpose Block?

When it comes to rigging your vessel, reliability and performance are paramount. The Series 40 All Purpose Block offers unparalleled strength and durability, ensuring that your sails and control lines operate smoothly under all conditions. Whether you're racing competitively or cruising leisurely, this block delivers the performance you need to keep your boat running efficiently.

Installation Tips

For optimal performance, mount the Series 40 All Purpose Block using two 5mm (3/16") fasteners. Ensure that the Captive Lock™ universal head is properly secured in your desired position to maximize versatility. Regularly inspect the block for any signs of wear and lubricate if necessary to maintain its self-lubricating properties.

Customer Support

Our dedicated support team is here to help you with any questions or concerns regarding the Series 40 All Purpose Block. Whether you need installation guidance or advice on maintenance, we're committed to ensuring you have the best experience with our products.

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.