Ronstan RF15174 Series 15 Ball Bearing Flip Flop Block Pivoting Lead

The Ronstan Series 15 Ball Bearing Flip Flop Block is a pivoting lead block designed for dinghies and small boat control line applications. This utility block features a 4-point fastening system for optimal load distribution and a low-profile design that can be mounted without disassembly.

Key Features:

• Smallest and lightest ball bearing block available from Ronstan
• Precision molded acetal sheave running on stainless steel ball bearings for high performance and low friction
• Single loop head includes an O-ring to separate running line from head lashing or fixing
• 4-point fastening system distributes loads evenly
• Can be mounted without requiring disassembly

Common Applications:

• Dinghy control lines and rigging systems
• Vangs, cunninghams, and tweaker adjustments
• Shock cord tensioning systems

Construction Materials:

• Sheave: UV stabilized acetal for durability and weather resistance
• Ball bearings: Corrosion-resistant stainless steel
• Cheeks: Marine-grade 316 stainless steel

The flip flop design allows for pivoting functionality, making this block ideal for applications requiring directional changes in control lines while maintaining smooth, low-friction operation.