Shaft Lok Products
Eight locking systems and control accessories — covering every shaft from 45 mm sailboats to 200 mm mega-yachts, plus custom bore machining when you need a non-stock fit.
Locking Units

Mod I EasyLok
45mmEngineered for tight engine room clearances. Upgraded in 2023 with a maintenance-free double-shielded bearing. Handles shafts up to 1.77" (45 mm).
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Most popularMod II EasyLok
57mmDesigned for boats with moderate engine room restrictions, with a quick, straightforward installation that appeals to a broad range of sailors. Max shaft 2.25" (57.15 mm).
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Mod II EasyLok High Torque
57mmEnhanced Mod II for demanding applications — ideal for larger sailing vessels with fixed-blade propellers that generate significant drag.
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Mod III EasyLok
80mmDesigned for large sailboats with ample engine room — maximum reliability under heavy loads for serious cruisers and commercial sailing applications.
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Mod III EasyLok High Torque
80mmThe highest torque capability in the Shaft Lok line — premium, high-strength construction for the toughest loads on serious cruisers and commercial vessels.
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MegayachtMod VI
165mmState-of-the-art locking for large motor vessels and restored schooners — allows safe single-engine transit for better fuel efficiency without freewheeling-prop transmission damage.
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Simple Spring Locking System
Push the manual knob to engage the lock while the shaft turns slowly — a reliable, cost-effective alternative to traditional marine control cables.
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Marine Control Cable
Marine-grade control cable for convenient shaft lock operation from the helm station, eliminating the need to enter the engine room.
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