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

Series 40 Ball Bearing Block - Fiddle - Becket - Cleat

Features:

• Low friction Acetal or Torlon bearing system
• Lightweight
• Cheek cut-outs for easy bearing maintenance
• Captive Lock universal head
• Slotted pin shackle eliminates fouled lines
• Snap fit removable becket pin
• Multi-position cleat arm
• Low friction, 2-stage ball bearing system
• High static and dynamic load capacity
• Lightweight
• Cheek cut-outs for easy bearing maintenance

Sheaves running on Acetal or Torlon ball bearings provide high performance low friction. The 2-stage ball bearing system provides consistent performance over the full load range.Captive Lock universal head can be fixed in either of two planes, or free to swivel as required. Quick adjusting cleat arms require no tools to adjust and fix securely in position. Becket pin is removable so line can be spliced prior to fitting and is i

Applications:

• Mainsheet
• Halyard
• Vang
• 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
• On larger boats they are used for fine-tune mainsheet tackles, outhauls, cunninghams, checkstays, genoa lead pullers and traveller controls.

Materials:

• Acetal ball bearings
• UV stabilized Acetal sheave
• Grade 316 stainless steel load strap and head fitting
• Impact and UV resistant, fiber reinforced Nylon cheeks

The Ronstan Series 40 Ball Bearing Block with Fiddle, Becket, and Cleat (Model RF40530) offers high-performance sailing hardware designed for demanding marine applications. Featuring a low friction 2-stage ball bearing system built with durable Acetal or Torlon bearings, this block ensures smooth operation and reliable load handling even under heavy loads. Its lightweight construction, combined with cheek cut-outs for easy bearing maintenance, makes it an efficient choice for racing and cruising vessels alike. The captive Lock universal head can be fixed in two planes or allowed to swivel freely, providing versatile positioning options to optimize sail trim and line control. The quick-adjust cleat arms require no tools for operation and securely lock into position, streamlining sail adjustments during dynamic conditions. Additionally, the removable becket pin allows for pre-splicing lines, simplifying line management and setup. Designed with a slotted pin shackle to prevent fouling lines, this block is suitable for a variety of applications including mainsheets, halyards, vangs, spinnaker control lines, and fine-tuning systems such as outhauls and traveler controls on boats up to 26 feet. Constructed with UV-stabilized Acetal sheaves, impact-resistant fiber-reinforced nylon cheeks, and Grade 316 stainless steel fittings, the RF40530 ensures durability and resistance to harsh marine environments. Whether used on smaller racing boats or larger cruising vessels, this ball bearing block delivers dependable performance, smooth line handling, and ease of maintenance, making it an essential component for modern sailboat rigging.

Features:

• Low friction Acetal or Torlon bearing system for smooth operation

• Lightweight design for easy handling and installation

• Cheek cut-outs facilitate easy bearing maintenance

• Captive Lock universal head can be fixed in two planes or swivel freely

• Slotted pin shackle prevents line fouling

• Snap fit removable becket pin for pre-spliced lines

• Multi-position cleat arm for versatile line control

• 2-stage ball bearing system provides consistent performance across load ranges

• High static and dynamic load capacity for demanding applications

• Durable UV-stabilized Acetal sheave for long-lasting use

• Impact and UV resistant fiber-reinforced nylon cheeks

• Constructed with Grade 316 stainless steel for corrosion resistance