Ronstan Series 60 AP Sheave - Acetal Solid Bearing - 60mm (2-3/8") OD

The Ronstan Series 60 AP Sheave is a 60mm acetal solid bearing block engineered for reliable rope and line management on sailboats, fishing vessels, and working watercraft. Built to handle the demands of serious anglers and boaters who depend on smooth, friction-free line control in salt spray and full sun exposure, this sheave delivers years of trouble-free performance where corrosion and UV degradation would compromise lesser materials. Whether you're rigging a mainsheet traveler, managing outhaul tension, or setting up halyard systems, the Series 60 AP provides the dependable mechanical advantage and wear resistance that marine professionals expect.

Ronstan formulated this sheave from a specially modified, ultra-violet resistant acetal compound that resists the brittle failure and discoloration typical of standard polymers in harsh marine environments. The solid bearing design eliminates moving pins and bushings, reducing maintenance while providing smooth rope glide and consistent load distribution across the drum. At 60mm (2-3/8") outer diameter, the Series 60 AP accommodates line diameters from roughly 5–10mm and delivers low friction across the entire load range, critical for both efficiency and crew safety on deck. The compact, lightweight design—just 0.1 lbs—makes it ideal for retrofit applications where weight savings matter for boat balance and fuel consumption.

Boaters upgrading aging bronze or steel blocks will immediately notice cleaner line play and faster sail trim response. The acetal material resists salt corrosion entirely, eliminating rust staining on deck and gelcoat, while the solid bearing withstands the cyclic loading of rough water and extended cruising seasons without fatigue cracking. Installation is straightforward on any standard marine block frame with compatible attachment hardware. This sheave suits everything from cruising sailboats and racing dinghies to commercial fishing boats and work vessels where reliability and durability are non-negotiable.