Schaefer 2-3/8" Aluminum Sheave

The Schaefer 2-3/8" Aluminum Sheave (MPN 62-070-BW) is a lightweight pulley system designed for sailboat rigging, boom systems, and halyard applications where space and weight are critical. Built from aluminum for corrosion resistance in marine environments, this sheave handles line up to 5/8" diameter and wire rope up to 3/16", making it suitable for moderate-load deck hardware and sheet systems on cruising and racing sailboats.

The 2-3/8" outside diameter and 1/2" inside diameter bore provide a compact footprint for tight mounting locations where larger block systems won't fit. The 3/4" width accommodates standard stainless steel fasteners and clevis pins, while the aluminum construction minimizes rotating mass—a practical advantage when managing sail control or reefing under load. The sheave's modest 1.05 lb weight reduces strain on supporting structures and deck fittings, important on boats where every ounce affects performance and fatigue on rigging hardware.

This sheave is popular with owners of daysailers, weekenders, and cruising sailboats who need straightforward, reliable deck hardware without the cost or overkill of oversized industrial blocks. It fits applications ranging from jib sheet leads and mainsheet systems to boom vang setups and genoa car track mounting. Schaefer Marine's reputation for accessible, proven rigging components makes this a trusted choice for both DIY upgrades and professional rigging shops.

When sourcing replacement sheaves or upgrading deck hardware, verify that the 1/2" bore matches your existing pin or fastener size, and confirm that 5/8" line capacity meets your sheet diameter requirements. Aluminum sheaves perform well in saltwater with periodic freshwater rinsing; they offer an excellent balance of durability, weight savings, and cost-effectiveness for moderate-load marine applications.