Lewmar 60mm Synchro Single Block, 1,760 lb Working Load Limit, Fits 5/16 to 3/8 Inch Line - 29926001BK

The Lewmar 60mm Synchro Single Block (29926001BK) is a single-sheave sailing block engineered for efficient rope handling on halyards, mainsheet systems, mast foot and head blocks, and boom vangs. The 60mm sheave is sized to accommodate line diameters from 5/16 inch to 3/8 inch and carries a 1,760 pound working load limit, giving it the strength for demanding running rigging applications.

A high-density Free-Spin bearing reduces axle diameter and rope friction, delivering smoother power transfer and less rope wear compared to standard budget blocks. The block geometry and self-aligning head are optimized to keep the sheave tracking true under load, and the design allows an easy switch between swiveling and fixed shackle configurations to suit different rigging setups. Stiff glass fiber reinforced cheeks resist flexing and help prevent lines from wedging between the sheave and the block body, while a stainless steel strap adds strength and extends service life. The shackle post is precision-designed for compatibility with Lewmar traveler systems.

Specifications

• Brand: Lewmar
• Manufacturer Part Number: 29926001BK
• Product Type: Single Block (Synchro Series)
• Sheave Diameter: 60 millimeters
• Working Load Limit: 1,760 pounds
• Line Diameter Range: 5/16 inch to 3/8 inch
• Bearing Type: High-density Free-Spin bearing
• Cheek Material: Glass fiber reinforced
• Strap Material: Stainless steel
• Shackle Configuration: Switchable between swiveling and fixed
• Weight: 0.8 pounds
• UPC: 743683203787

Frequently Asked Questions

What line size does the Lewmar 29926001BK Synchro Single Block accept? The 29926001BK accommodates line diameters from 5/16 inch to 3/8 inch, matching its 60 millimeter sheave.

What is the working load limit of this block? 1,760 pounds is the working load limit for the Lewmar 60mm Synchro Single Block, 29926001BK.

Can the shackle be swapped between swiveling and fixed? Yes, the Synchro Single Block, part number 29926001BK, is designed so the shackle can be switched between a swiveling and a fixed configuration.

What is the sheave made to reduce friction? A high-density Free-Spin bearing in the 29926001BK reduces axle diameter and rope friction for smoother power transfer and less rope wear.

Is this block compatible with Lewmar travelers? Yes, the 29926001BK has a shackle post precision-designed for compatibility with Lewmar traveler systems.

What are typical uses for this block? The Lewmar 60mm Synchro Single Block is used for halyard tuning, mainsheet systems, mast foot and head blocks, and boom vangs.

What material are the block cheeks made from? The cheeks on the 29926001BK are stiff glass fiber reinforced construction, which helps prevent lines from wedging between the sheave and the block body.

Does the block include a stainless steel strap? Yes, the 29926001BK includes a stainless steel strap for added strength and longer service life.

How much does the Lewmar 29926001BK weigh? The Lewmar 60mm Synchro Single Block, 29926001BK, weighs 0.8 pounds.

How is this block different from a standard budget block? The Synchro Single Block's optimized geometry, Free-Spin bearing, and self-aligning head are built to cut friction compared to a standard budget block, resulting in smoother handling and less rope wear.

What sheave size does the 29926001BK use? This block uses a 60 millimeter sheave diameter.

Is the 29926001BK a single or double block? The 29926001BK is a single-sheave block, part of Lewmar's Synchro block line.