A self-tailing winch is a winch with a spring-loaded stripper arm and a grooved jaw at the top of the drum that grips and cleats the line automatically, letting you trim, grind, and hold a sheet or halyard solo without a dedicated tailer. Choosing the right one comes down to matching the winch size to your boat's loads, picking single-, two-, or three-speed gearing, and selecting a drum material and brand that suit how you sail.
Self-tailing winches at a glance
| Boat length | Typical winch size | Common gearing | Primary use |
|---|---|---|---|
| Under 30 ft | Size 16–24 | One or two speed | Sheets & halyards |
| 30–45 ft | Size 40–55 (primaries), 25–40 (secondaries) | Two speed | Primary sheets, halyards |
| 45 ft and up | Size 55–80+ | Two or three speed, often electric | Primary sheets, heavy air |
How does a self-tailing winch work?
A self-tailing winch uses a spring-loaded stripper arm and a grooved self-tailing jaw at the top of the drum to grip and hold the line automatically as it is winched in. The line feeds into the jaws, the drum rotates under power, and the tail feeds itself away — no second hand required. This mechanism works across a range of line diameters, though each winch has a recommended rope size range that should be matched carefully to your sheets and halyards.
The internal gearing is where manufacturers differentiate themselves. A single-speed winch offers one gear ratio for straightforward applications. Two-speed winches provide a fast retrieval gear for light loads and a slower, more powerful gear for heavy loads — switched by reversing the winch handle direction. Three-speed winches add a third gear for maximum mechanical advantage when grinding hard against a loaded sail in heavy air.
What size self-tailing winch do I need?
Winch size is expressed as a working load rating — typically in kilograms or pounds — and as a gear ratio. The larger the number, the more powerful the winch. As a general rule, boats under 30 ft use size 16–24 winches for sheets and halyards; mid-size cruisers from 30–45 ft use size 40–55 for primary sheets and size 25–40 for secondaries and halyards; and offshore or performance boats over 45 ft use size 55–80+ primary sheet winches, often with electric assistance.
Always size up if you are between ratings. An undersized winch will be overworked, heat up faster, and wear significantly sooner. The cost difference between one size class is far less than a premature rebuild.
Which drum material should I choose?
Drum material has a direct impact on weight, corrosion resistance, and long-term durability. Anodized aluminum is the standard for most performance and cruising winches — lightweight, strong, and corrosion-resistant when properly maintained, and used by Harken, Lewmar, and Andersen across their core ranges. Stainless steel is heavier but extremely durable, common on older winches and some commercial applications; it needs more polishing but rarely corrodes. Carbon fiber appears on high-end racing winches (Antal, some Harken models), dramatically reducing weight aloft and on deck at a significantly higher price.
Which brand is right for me?
Harken spans the compact Performa to the high-load Radial range; Radial winches use a bottom-entry design where line feeds in at the base rather than the top, reducing friction and increasing efficiency at high loads, and the OneTouch jaw releases the line with a single touch. Lewmar's EVO and Ocean series are among the most widely installed winches on production cruisers, with excellent value, reliable two-speed gearing, and exceptional spares availability. Andersen winches can be disassembled, cleaned, and reassembled in under 20 minutes with basic tools — a favorite of offshore sailors and circumnavigators. Antal's XT series uses roller bearings rather than plain bearings to reduce grinding effort under load, and is common on Mediterranean racing circuits.
How do I maintain a self-tailing winch?
All self-tailing winches require periodic servicing — typically once per season for frequently used primary sheet winches, or every two years for lightly used halyard winches. Remove the top cap and self-tailing arm, lift out the drum to expose the spindle, pawls, and springs, clean all components with fresh water and a soft brush, and inspect the pawls and springs for wear (the most common failure point). Re-grease bearings with a marine-grade winch grease, re-oil pawls with a light non-clogging pawl oil, then reassemble and test under load.
Never use WD-40 or general-purpose lubricants inside a winch — they wash out quickly in saltwater and can cause pawls to stick, leading to winch reversal under load.
Racing vs. cruising: different priorities
Racing sailors prioritize speed, weight, and gear ratios optimized for quick sail changes, often accepting more grinding effort in exchange for faster sheeting and lighter weight aloft. Cruising sailors prioritize reliability, ease of use, and low maintenance: jaws that grip a range of rope constructions, simple internals serviceable at anchor, and corrosion resistance in the tropics matter more than saving a few grams. Two-speed gearing is usually sufficient for cruisers; three-speed becomes valuable mainly on boats over 45 feet in heavy conditions. For shorthanded crews, an electric self-tailing winch adds mechanical advantage that physical strength alone cannot match — the jaw works the same as on a manual unit; only the power source changes.
Frequently asked questions
What is a self-tailing winch?
It is a winch whose grooved top jaw and spring-loaded stripper arm grip and cleat the line automatically, so one person can trim, grind, and hold a sheet or halyard without a separate tailer.
What is the difference between one-, two-, and three-speed winches?
A single-speed winch has one gear ratio; a two-speed adds a slower, more powerful gear engaged by reversing the handle direction; a three-speed adds a further low gear for maximum mechanical advantage in heavy air.
What size self-tailing winch do I need?
Match the size to your boat and loads: roughly size 16–24 under 30 ft, size 40–55 for primaries on 30–45 ft cruisers, and size 55–80+ over 45 ft. When in doubt, size up.
Aluminum or stainless steel winches?
Anodized aluminum is lighter and the standard for cruising and performance boats; stainless steel is heavier and more durable but needs polishing. Carbon fiber is reserved for weight-critical racing.
How often should I service a self-tailing winch?
Service busy primary winches about once a season and lightly used halyard winches every two years, cleaning and re-greasing internals and re-oiling the pawls with proper marine winch lubricants.
Can I convert a manual winch to electric?
Yes — purpose-built electric models and conversion kits (such as Lewmar EVO electric and Harken electric conversions) power the same self-tailing mechanism, which is a major help for shorthanded cruisers.
Shop all Self-Tailing Winches →