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Harken SheavesHarken


Harken Sheaves come in 4 styles. Each style provide you with several sizes and options that are right for your boat.

Harken Self-contained sheaves are designed for sailors to use in custom applications. The Micro, Bullet, and Big Bullet sheaves are Delrin® with Delrin® ball bearings. They are scored for rope. 16 mm AirBlock® sheaves are Delrin® and feature stainless ball bearings that ride in a grooved race. Midrange sheaves come in either Delrin® or aluminum for wire. Wire sheaves are Hard Lube-anodized aluminum that ride on high-load composite bearings.

Harken Big Boat sheaves are available for special applications as well as for replacement sheaves in Big Boat blocks. Made of Hard Lube-anodized, 6061-T6 aluminum, sheaves feature Torlon® rollers to carry high radial loads and carbon-black Delrin® balls to support sideloads and provide UV protection. Select sheaves based on load-carrying capability.

Harken High-load sheaves are offered as replacement parts or for use in special applications. Their bearing system combines sideload-carrying balls with a PTFE composite bushing to carry radial loads. While not as free-rolling as the standard Harken® ball/roller bearing system, this compact bearing system is extremely durable and perfect for carrying high loads in a restricted diameter.

Harken Narrow high-load sheaves in mastheads improve sail handling, speed sail changes, and allow the use of smaller, lighter halyard winches. Used in steering systems, these sheaves return “feel” to wheel-steered boats.

Harken Sheaves


We at Layline strive to be your source for Harken Sheaves and all sailboat hardware, rigging, and sailing gear. With our focus on one design and handicap racing we can offer advice and reviews of what you need to compete. If you need any assistance selecting the appropriate Harken Sheaves please contact us. Our crew is ready to help!
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