Ronstan RF40530 Series 40 Ball Bearing Fiddle Block with Becket and Cleat

The Ronstan Series 40 Ball Bearing Fiddle Block with Becket and Cleat is a high-performance sailing block designed for mainsheet, halyard, vang, and spinnaker control applications on boats up to 8m (26ft). This fiddle block features a sophisticated 2-stage ball bearing system that delivers consistent low-friction performance across the full load range, making it ideal for direct 4:1 purchase systems.

Key Features:

• 2-stage ball bearing system with Acetal bearings for superior performance and minimal friction
• Captive Lock™ universal head can be fixed in two planes or left free to swivel as needed
• Quick-adjusting multi-position cleat arm requires no tools and locks securely
• Removable snap-fit becket pin allows line splicing before installation
• Slotted pin shackle design prevents line fouling
• Cheek cut-outs provide easy access for bearing maintenance
• High static and dynamic load capacity in a lightweight package

Construction:

• UV-stabilized Acetal sheave with Acetal ball bearings
• Grade 316 stainless steel load strap and head fitting for corrosion resistance
• Impact and UV-resistant fiber-reinforced Nylon cheeks

Applications:

Perfect for mainsheets, halyards, boom vangs, and spinnaker control lines on off-the-beach catamarans, one-design classes, and sportsboats up to 26 feet. On larger vessels, these blocks excel in fine-tune mainsheet tackles, outhauls, cunninghams, checkstays, genoa lead pullers, and traveller controls.