How does a worm gear work? Gear ratio Self-locking Advantages & disadvantages
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Worms are a special type of gear in which a tooth winds spirally around a shaft. The opposite wheel is called a worm wheel and the entire gear is called a worm gear. The number of gears on a worm corresponds to the number of teeth on a gear and thus determines the gear ratio. The advantages of worm gears are their high gear ratio, their load capacity, low noise and the ability to transmit large amounts of power. The power transmission in worm gears takes place through helical sliding processes, which is why they are classified as so-called helical rolling gears. Worm gears are often self-locking, which means that the torque is only transmitted in one direction. A distinction is made between static self-locking and dynamic self-locking (self-braking). Self-locking gears are generally less efficient. 00:00 What is a worm gear (worm and worm wheel) 01:19 How is the gear ratio determined? 02:28 Advantages of worm gears 03:26 Self-locking 04:36 Efficiency 05:24 Run-on of worm gears
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