A vernier coupling is a device used two couple two shafts, so that they may be precisely adjusted in their phase relative to each other. They are commonly used to set the injection timing of a diesel engine. A typical coupling has couplers of 19 and 20 teeth, allowing up to 380 increments per revolution, or an adjustment precision of slightly better than one degree.
Media in category "Vernier couplings"
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- Vernier coupling (Manual of Driving and Maintenance).jpg 706 × 381; 46 KB