If you have a broken or worn out sheave, we at Mauri Pro
Sailing have the replacement sheave for your block, mast or deck organizer. Various sizes are
available to replace sheaves for many sailboat applications.
Reduce friction and increase your purchase power with any of the sheaves
we carry from Antal, Harken, Ronstan, and Schaefer.
About Harken Sheaves
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. Sheaves combine sideload-carrying balls with a PTFE composite bushing for radial loads. These durable sheaves are made of 6061-T6 aluminum and are well-suited for masthead and steering installations.
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. Use Cruising ESP sheaves to handle high static loads from halyards and reef lines. Sheaves are carbon-black Delrin® for UV protection and turn on stainless steel spacers. Contained sideload ball bearings allow sheaves to spin freely when loads are released. Sheaves require a sideplate for the sideload balls to roll on.
Ronstan Nylatron sheaves are made from a unique plastic material which is suitable for use with wire. Nylatron® is a cast, partially cross-linked polyamide compound which has been modified with a MoS2 filler. It has excellent wear resistance, self lubrication and low friction properties.
Ronstan's range of Acetal sheaves is moulded from a specially modified ultra-violet resistant grade of material to provide a long service life in the tough marine environment. Acetal is well suited to the application, with characteristics of high strength and resistance to impact and wear. It also exhibits excellent low friction properties for bearing applications. These Roller Ball Bearing Sheaves from Ronstan are manufactured to operate with low friction under load.
About Shaefer Sheaves