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
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
either Delrin® or aluminum for wire.
Wire sheaves are Hard Lube-anodized aluminum that ride on high-load
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.
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!