Ronstan RF15711 Series 15 Ball Bearing Exit Block

The Ronstan RF15711 is a Series 15 ball bearing exit block designed for high-performance marine applications where space and weight are critical. This compact utility block is the smallest and lightest ball bearing block available, making it ideal for dinghies and small sailboats.

Key Features:

• Precision-molded acetal sheave running on stainless steel ball bearings for exceptionally low friction and smooth operation
• Formed single-piece housing design provides maximum strength while minimizing rope wear
• Single loop head design includes an O-ring to separate running line from head lashing or fixing point
• Flush rivet construction minimizes cutout size and simplifies installation
• Exit block configuration optimizes line routing at turning points

Common Applications:

• Dinghy control lines and mainsheet systems
• Vangs, cunninghams, and tweaker adjustments
• Shock cord tensioning systems
• Small boat rigging where weight savings matter

Construction Materials:

• Sheave: UV-stabilized acetal for long-lasting durability in harsh marine environments
• Ball bearings: Stainless steel for corrosion resistance and smooth rotation
• Cheeks: Grade 316 stainless steel for superior strength and corrosion protection

The RF15711 combines Ronstan's precision engineering with marine-grade materials to deliver reliable performance in demanding sailing conditions.