Shaft Lok
Posted: 31 December 2022
Shaft Lok - Specifications and Options Shaft Lok - Specifications and Options
Shaft Lok is an innovative solution designed to securely lock the propeller while sailing, eliminating noise caused by a spinning prop and shaft. By preventing freewheeling, Shaft Lok minimizes heat buildup in the transmission, reduces unnecessary wear on drivetrain components, and ensures quieter, more efficient sailing experiences.
Its robust construction and advanced features, such as automatic unlocking when the engine restarts, make it a reliable choice for sailors. Shaft Lok is available in various models and sizes to suit different vessel types, with options for high-torque applications and custom boring. To select the right model, measure your propeller shaft diameter and check available space in your engine compartment. Visit our price book or contact us for more information.
Available Models and Specifications
| Model | Description | Maximum Bore | Additional Notes |
| Mod I Easy Lok | Upgraded with 316 stainless steel rotating disc and hub assembly | 45mm | First unit shipped in 1979 |
| Mod II Easy Lok | Standard Easy Lok model | 2.25" | Available for bores 1.25" or smaller and greater sizes up to 2.25" |
| Mod II Easy Lok High Torque | Features a metal plate and fully enclosed housing | 2.25" | Suitable for higher torque applications |
| Mod III Easy Lok | Standard Easy Lok model for larger bores | 80mm | Available for bores up to 64mm or larger |
| Mod III Easy Lok High Torque | High torque configuration | 80mm | Designed for heavy-duty use |
| Mod IV Easy Lok High Torque | Price on Application | 110mm | For large marine vessels |
| Mod V Easy Lok High Torque | Price on Application | To Be Determined | Custom bore sizes available |
| Mod VI Easy Lok High Torque | Price on Application | 6.5 inches | Designed for the largest vessels |
How to Measure and Select
Proper measurement and selection of the Shaft Lok unit are essential to ensure compatibility and optimal performance. Follow these steps:
- Measure the Shaft Diameter: Use a caliper to measure the diameter of your propeller shaft at the intended installation point.
- Check Available Space: Ensure there is enough room in your engine compartment for the selected unit. Use the following rotor template diameters to test the fit:
- Mod I Easy Lok: 4 1/8" diameter
- Mod II Easy Lok: 6.75" diameter
- Mod III Easy Lok: 11.75" diameter
- Select the Appropriate Model: Match your shaft diameter and available space with the specifications of the available Shaft Lok models listed above.
- Consider Custom Boring: If your shaft size is not listed as in-stock, custom boring is available upon request.
Installation Guidance
To ensure the Shaft Lok unit fits your vessel, use a cardboard rotor template with the specified diameters above. Center the hole for the propeller shaft and cut a loading slot equal to the shaft diameter. Test the template in your engine room where the unit will be installed.
Real-World Applications
Shaft Lok has been successfully used in a variety of sailing applications, from enhancing performance during long trips to reducing maintenance costs. For example, in a recent test, Shaft Lok reduced drag by eliminating the resistance caused by a windmilling propeller, resulting in significant fuel savings and a quieter sailing experience.
Environmental Benefits
By locking the propeller and reducing drag, Shaft Lok contributes to improved fuel efficiency and lower emissions, supporting sustainable boating practices. This makes it an eco-friendly choice for sailors who value both performance and environmental responsibility.
Gallery Images
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