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Worm Gearbox for Flight Control Surface Actuators

Introduction to Worm Gearbox and Its Importance

The worm gearbox, also known as the worm gear reducer, is an essential component in many industrial and mechanical applications. As its name suggests, it consists of a worm (a gear in the form of a screw) and a worm gear (a gear resembles a spur gear), which work together to reduce rotational speed or allow higher torque to be transmitted.

The Functioning of Worm Gear Reducer

The worm gear reducer operates based on the principle of meshing between the worm and the worm gear. The worm, which is the driving component, is connected to the motor shaft. When the worm rotates, it drives the worm gear, which is mounted on the output shaft, to rotate. The 90-degree angle between the worm and the worm gear axis and the sliding action of their teeth provide a silent, vibration-free operation and a high reduction ratio in a compact size. It is this unique mechanism that makes the worm gear reducer an essential component in the operation of Flight Control Surface Actuators.

Basic Structure and Composition of Worm Gearbox

Worm Gear

The worm gear is a large diameter gear with grooves that accommodate the worm. It is usually made of bronze or other soft metals to reduce friction and enhance durability.


The worm is a screw-like gear that meshes with the worm gear. It is typically made of hardened steel to withstand high torque loads.

Input Shaft

The input shaft connects the worm to the motor. It transmits power from the motor to the worm.

Output Shaft

The output shaft is connected to the worm gear. It transfers the reduced speed or increased torque from the worm gear to the load.

Why Worm Gearboxes Suit Flight Control Surface Actuators

There are several reasons why worm gearboxes are ideal for flight control surface actuators:

  • High Torque Output: Worm gearboxes can handle high torque loads, making them suitable for applications that require significant force, such as moving flight control surfaces.
  • Compact Size: Their compact design allows them to fit into tight spaces on aircraft.
  • Smooth Operation: The sliding action of the worm and worm gear teeth provides smooth, silent operation, which is crucial for aircraft applications.
  • High Reduction Ratios: Worm gearboxes can provide high reduction ratios, reducing the speed of the motor to the required level.
  • Self-Locking Capability: In some designs, the worm gearbox can be self-locking, preventing back-driving and ensuring the safety of the flight control system.

Characteristics and Advantages of Worm Gear Motor

Worm Gear Motors or Worm Gearboxes boast several features and benefits:

  • High Efficiency: They can convert up to 90% of the input power into output power.
  • Durability: The use of high-quality materials enhances their durability, reducing maintenance needs and costs.
  • Versatility: They can be used in a wide range of applications, including in harsh environments.
  • Cost-Effective: Despite their many benefits, worm gear motors are relatively inexpensive compared to other types of gearboxes.

Choosing the Right Worm Reducer for Your Application

To choose the right worm reducer for Flight Control Surface Actuators, consider the following:

  • Torque Requirements: Determine the torque requirements of your application and choose a worm reducer that can handle the load.
  • Size Constraints: Consider the space available for the gearbox and ensure the chosen model fits.
  • Speed Reduction Ratio: Determine the speed reduction ratio needed and choose a worm reducer that offers that ratio.
  • Environmental Conditions: Consider the operating conditions and ensure the chosen worm reducer can withstand them.

Motors for Worm Gear Reducers

Just as important as the worm gearbox itself is the motor that powers it. The two components work in tandem to deliver the necessary motion control for flight control surface actuators. Our company also offers a range of electric motors explicitly designed for use with our worm gear reducers.

Motors for Worm Gear Reducers

About Us

As a comprehensive transmission equipment manufacturer, we integrate research, development, manufacturing, and sales of speed reducers. With over 15 years of experience in the gearbox industry, we’ve served customers globally and earned their trust. Our dedication to quality, efficiency, and stability results in products that meet the highest standards. Among our offerings are the MRV series worm gear reducer, GV series gear reducer, and many more. We invite you to explore our products and contact us for your gearbox needs.

Worm Gearbox Factory


Q1: What are the main applications of worm gearboxes?

A1: Worm gearboxes are used in various industries such as equipment, food, car washing, packaging, transmission, automation, and solar energy.

Q2: Are worm gearboxes self-locking?

A2: Some designs of worm gearboxes have a self-locking feature, which prevents back-driving.

Q3: What materials are used to make worm gearboxes?

A3: The worm is typically made of hardened steel, while the worm gear is usually made of bronze or other soft metals.

Edited by Zqq.