Ronstan Series 40 Ball Bearing Block - Fiddle - Becket - Cleat

Enhance your vessel’s rigging system with our Series 40 Ball Bearing Block, expertly designed for superior performance and durability in marine environments. Whether you’re managing mainsheets, halyards, or vang lines, this ball bearing block ensures smooth operation and reliable control under varying load conditions.

Features

• Low friction Acetal or Torlon® two-stage ball bearing system for optimal performance
• Lightweight construction reduces overall load without compromising strength
• Cheek cut-outs allow for effortless bearing maintenance and inspection
• Innovative Captive Lock™ universal head offers versatile mounting options with two fixed planes or swiveling capability
• Slotted pin shackle design prevents fouled lines, ensuring clean and efficient line handling
• Snap-fit removable becket pin facilitates easy line splicing and installation
• Multi-position cleat arm enables quick, tool-free adjustments and secure line management
• High static and dynamic load capacity suitable for a wide range of marine applications

Performance Attributes

Attribute	Description
Bearing System	Low friction Acetal or Torlon® two-stage ball bearing system ensures consistent performance across the full load range.
Head Fitting	Captive Lock™ universal head can be fixed in two planes or allowed to swivel, providing versatile mounting options.
Cleat Arms	Quick adjusting cleat arms require no tools to adjust and lock securely in position, enhancing ease of use.
Maintenance	Cheek cut-outs and removable becket pin design simplify bearing maintenance and line splicing.

Applications

• Mainsheet control for precise sail handling
• Halyard systems for raising sails effortlessly
• Vang lines to manage boom position and sail shape
• Spinnaker control lines on off-the-beach catamarans, one-design classes, and sportsboats up to 8m (26ft)
• Direct 4:1 purchase systems such as mainsheets and boom vangs for increased mechanical advantage
• Fine-tuning mainsheet tackles, outhauls, cunninghams, checkstays, genoa lead pullers, and traveller controls on larger vessels

Materials and Construction

• Acetal ball bearings for reliable low-friction performance
• UV stabilized Acetal sheave ensures longevity and resistance to marine elements
• Grade 316 stainless steel load strap and head fitting provide exceptional corrosion resistance and strength
• Impact and UV resistant, fiber-reinforced Nylon cheeks enhance durability and maintain structural integrity

Built to withstand the harsh conditions of marine environments, the Series 40 Ball Bearing Block combines advanced materials with innovative design features to deliver unparalleled performance and reliability. Upgrade your boat’s rigging with a solution trusted by sailors and boaters worldwide.

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.