Ronstan Series 40 Ball Bearing Fiddle Block, Becket, Cleat – High-Performance

Experience unmatched control and efficiency on the water with the Ronstan Series 40 Ball Bearing Fiddle Block. Engineered for high performance in demanding marine environments, this block features a low-friction, two-stage ball bearing system that ensures consistent performance across the full load range. Its robust construction with Grade 316 stainless steel and UV-resistant components guarantees lasting durability for essential sailing control lines. Upgrade your rigging with Ronstan's proven reliability.

Key Features & Benefits:

• Low Friction, 2-Stage Ball Bearing System: Delivers consistent, high-performance operation across the full load range.
• Premium Bearing & Sheave Materials: Features precision-molded Acetal or Torlon® ball bearings and a UV-stabilized Acetal sheave for superior low-friction performance and extended lifespan.
• Corrosion-Resistant Construction: Built with a Grade 316 stainless steel load strap and head fitting for exceptional strength and marine-grade corrosion resistance.
• Impact & UV Resistant Cheeks: Fiber-reinforced Nylon cheeks offer enhanced durability against impacts and harsh UV exposure in marine conditions.
• Multi-Position Cleat Arm: Allows for quick, secure, and tool-free adjustments to optimize cleating angles.
• Captive Lock™ Universal Head: Provides versatile rigging options, allowing the head to be fixed in two planes or free to swivel as required.
• Slotted Pin Shackle: Ingeniously designed to eliminate fouled lines, ensuring smooth operation.
• Snap-Fit Removable Becket Pin: Enables easy pre-splicing of lines prior to fitting, securely locking into position without tools.
• Cheek Cut-Outs: Designed for easy access, simplifying bearing maintenance.
• High Static & Dynamic Load Capacity: Ensures reliable and safe operation under various sailing loads.
• Lightweight Design: Contributes to minimized overall rigging weight without compromising strength.

Technical Specifications:

• Safe Working Load (SWL): 770 lb (349 kg)
• Breaking Load (BL): 2200 lb (1000 kg)
• Maximum Line Size: 5/16" (8 mm)
• Sheave Diameter: 1-9/16" (40 mm) & 15/16" (24 mm)

Applications & Compatibility:

• Ideal for mainsheet, halyard, vang, and spinnaker control lines on off-the-beach catamarans, one-design classes, and sportsboats up to 8m (26ft).
• Typically used in direct 4:1 purchase systems such as mainsheets and boom vangs.
• Suitable for fine-tune mainsheet tackles, outhauls, cunninghams, checkstays, genoa lead pullers, and traveller controls on larger boats.