What Is The Function Of A Worm?

Jul 15, 2026

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Core Transmission Functions

  • Speed ​​Reduction and Torque Multiplication: A single stage can achieve a high transmission ratio (ranging from 10:1 to 80:1), significantly reducing input speed while amplifying output torque, all within a compact, space-saving design.
  • Motion Conversion: It converts the rotational motion of the worm into the rotational motion of the worm gear (typically in a perpendicular plane) and can also indirectly facilitate linear motion, making it suitable for specialized transmission layouts.
  • Changing Transmission Direction: It enables power transmission between two shafts oriented at a 90-degree angle in space, allowing for the adjustment of the power output direction.

 

Special Functional Characteristics

  • Self-Locking and Anti-Reversing: When the worm's lead angle is smaller than the equivalent friction angle, power can only be transmitted from the worm to the worm gear-not the other way around. This feature is ideal for safety applications, such as preventing load drops in lifting equipment.
  • Smooth and Quiet Operation: The worm features continuous helical teeth, ensuring a shock-free meshing process with minimal vibration and noise, thereby enhancing the operational precision and stability of the equipment.
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