What’s the difference between planetary gearbox and cycloidal gearbox

Understanding the dynamics and intricacies of mechanical components is crucial when deciding the type of gearbox to use in your machinery. Two of the most common types of gearboxes are the planetary gearbox and the cycloidal gearbox. While they both serve the same fundamental purpose of transmitting power, their working mechanisms, efficiency, and applications vary significantly.

Planetary Gearbox

The planetary gearbox, also known as epicyclic gear system, is a type of gear mechanism that consists of one or more outer gears, or planet gears, revolving around a central, or sun gear. Typically, the sun gear is in the center, surrounded by three to four planet gears, all enclosed in a circular gear called the ring gear.

Advantages of Planetary Gearbox

    • Compact and highly efficient
    • High power density


  • Provides high torque in a small package
  • Multiple gear ratios can be achieved with a single planetary set

Applications of Planetary Gearbox

Planetary gearboxes are used in several applications due to their efficiency and versatility. Some of the common applications include wind turbines, automotive transmissions, and industrial machinery. They are also used in high precision machinery due to their ability to reduce speed and increase torque in a compact design.

Here is an example of a planetary gearbox used in industrial machinery:

Planetary Gearbox

Cycloidal Gearbox

The cycloidal gearbox, also referred to as a cyclo-drive, operates on the principle of cycloidal motion. Unlike the planetary gearbox, the cycloidal gearbox uses an eccentric cam instead of gears. A race of rolling pins built into the gearbox housing serves as the output shaft.

Advantages of Cycloidal Gearbox

  • High torque output
  • Excellent shock-load resistance
  • Minimal backlash
  • High ratio capabilities

Applications of Cycloidal Gearbox

Cycloidal gearboxes are most commonly used in heavy-duty applications in industries like mining and construction. They are also used in robotics and conveyors due to their high torque and low speed capabilities.

Comparison between Planetary and Cycloidal Gearbox

While both types of gearboxes have their advantages, the choice between the two depends on the specific requirements of your application. Planetary gearboxes are ideal for applications requiring high speed and efficiency, while cycloidal gearboxes are more suited for applications requiring high torque and durability.

About Ever-Power

Ever-Power is a leading provider of high-quality and reliable gearboxes. With an unwavering commitment to product quality and reliability, we offer gearboxes that are designed to deliver superior performance and durability. Our technical expertise and innovation enable us to continually adapt to consumer markets and customer needs, ensuring that we remain at the forefront of gearbox technology.

Our ability to provide customization and flexibility sets us apart in the industry. We welcome customers to provide custom solutions and drawings, and we guarantee a response within 24 hours. All our products are certified and comply with industry standards, ensuring that you receive the best quality gearboxes that meet your specifications.

Here is a glimpse of our company:



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