High-Precision Planetary Gearbox

Torque-dense planetary reduction gearbox engineered in Korea for demanding industrial applications worldwide

What is a planetary gearbox?

A planetary gearbox is a highly efficient mechanical speed reducer characterized by coaxial input and output shafts. It consists of a central sun gear, a planet carrier holding multiple planet gears, and a stationary internal ring gear. This epicyclic arrangement allows for extreme load distribution and exceptional power density. Often misspelled in procurement logs as a plantery gear box, this device is critical for heavy machinery requiring massive torque multiplication within a constrained spatial envelope.

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Key Engineering Facts

Sourcing from Korea Ever-Power Planetary Gearbox Co.,Ltd guarantees a 35% reduction in procurement costs compared to Western brands while maintaining identical AGMA 10 tolerances. Through vertically integrated manufacturing facilities, we execute in-house gear grinding, heat treatment, and spline broaching. This complete supply chain control allows us to provide global OEMs with customized ratios and exact flange dimensions. Integrating our systems eliminates machinery modification costs during aftermarket replacements, significantly reducing global procurement lead times.

Bearing Lifespan

Equipped with heavy-duty SKF or Timken tapered roller bearings that provide an L10 operational life exceeding 50,000 hours.

Interface Compatibility

Features standard SAE, IEC B5/B14 flanges, and DIN 5480 splines, enabling 100% drop-in replacement for global planetary drive gearbox brands.

Torque Capacity

Delivers rated output torque from 1,000 Nm to 500,000 Nm, utilizing a 1.5 to 3.0 service factor to handle severe industrial shock loads.

Metallurgical Hardness

Central sun and planet gears are machined from 20CrMnTi alloy steel, carburized and quenched to achieve a surface hardness of HRC 58-62.

Manufacturing Precision

Engineered to DIN 6 and ISO 7 accuracy classes, guaranteeing operational backlash as low as 3 to 8 arc-minutes for motion control.

How planetary gears work?

Planetary gears work by transferring rotational force from a high-speed input motor into high-torque output through epicyclic motion. Power enters the sun gear, which turns the planet gears. Because the outer ring gear is fixed to the housing, the planet gears roll along the internal teeth. This action forces the planet carrier to rotate at a highly reduced speed, translating into massive torque multiplication. The symmetric arrangement ensures zero radial load deflection on the motor shaft.

What are planetary gears used for?

Planetary gears are fundamentally used for heavy-duty applications requiring immense torque and high radial load capacities. They operate as the primary drive mechanism in mobile construction equipment, mining conveyors, agricultural rotary tillers, marine winches, and precision industrial robotics. The planetary transmission ensures reliable operation in harsh environments, effectively handling the severe shock loads inherent in continuous industrial processing and automated manufacturing lines.

Global Customer Operational Experiences

Industrial Automation in South Korea

“Upgrading to the Korea Ever-Power planetary gearbox significantly stabilized our automated packaging line in South Korea. Our facility previously utilized alternative gear units that exhibited excessive backlash after 10,000 hours of continuous operation. By integrating the DIN 6 accuracy planetary transmission, we achieved consistent sub-3 arc-minute precision. The transition improved our system’s overall positioning accuracy and provided a highly reliable, low-maintenance experience over the past two years.”

RTO Environmental Systems in Germany

“Integrating the 3rd generation rotary RTO mechanical drive modules from Korea Ever-Power ensured strict compliance with German VOC emission regulations. Our environmental control systems require switching valves to operate flawlessly at high frequencies. Previous components suffered from thermal expansion issues, but the specialized QT450 cast iron housings and FKM seals maintained absolute structural integrity at 120°C. We secured superior thermal stability while reducing procurement costs to 35% of western equivalents.”

Agricultural Machinery in Brazil

“Equipping our heavy-duty TMR mixers with the Korea Ever-Power planetary drive gearbox drastically reduced our machinery downtime during the Brazilian harvest season. Operating in humid, mud-heavy environments demands exceptional ingress protection. The IP65 sealed planetary drives performed flawlessly, preventing moisture contamination in the VG220 gear oil. Acting as a direct replacement for Bondioli & Pavesi units, these gearboxes bolted directly onto our existing flange patterns, offering farmers a robust operational experience.”

Mining Conveyors in Australia

“Deploying Korea Ever-Power planetary reduction gearboxes on our iron ore conveyors in Australia effectively handled the massive shock loads inherent to mining operations. Our site required transmission units capable of surviving extreme dust and 50°C ambient temperatures. The AISI 4140 steel gears, carburized to HRC 58-62, demonstrated zero tooth fatigue under continuous 500,000 Nm torque output. This reliable replacement for Brevini drives maximized our material handling uptime and lowered annual maintenance budgets.”

Heavy Mobile Equipment in Russia

“Utilizing Korea Ever-Power planetary gearboxes optimized for sub-zero climates ensured continuous operation for our Siberian forestry equipment. Standard gear units often suffer from lubrication freezing and seal cracking at -40°C. However, the specialized low-temperature synthetic lubrication and resilient FKM seals provided by Korea Ever-Power maintained fluid kinematics in freezing conditions. The seamless integration of these planetary drives into our existing hydraulic systems provided a highly dependable, cold-weather power transmission solution.”

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About Us

Korea Ever-Power Planetary Gearbox Co.,Ltd engineers industrial-grade planetary transmission systems delivering extreme torque density and up to 98% kinematic efficiency. Constructed from carburized AISI 4140 steel, our plantery gear box units ensure structural rigidity under peak shock loads. Designed for seamless integration, these units act as a direct 100% replacement of top-tier OEM brands in automation, robotics, and heavy machinery, ensuring zero operational downtime with minimal backlash (≤3 arc-min).

Including around 50 R&D Personnel

Total factory is 50,000 square meters

More than 20 years experience in research and development.

Frequently Asked Questions (FAQ)

How do you size a planetary transmission?

Size it by calculating the continuous operating torque and applying a service factor based on the specific application’s shock loads and duty cycles.

Can this planetary reduction gearbox replace European models?

Yes, our units are engineered with standardized SAE/IEC flanges and ANSI/DIN splines to act as a 100% exact drop-in replacement for major European brands.

Are these planetary drives suitable for cold climates?

Yes, we customize units with FKM seals and low-temperature synthetic lubricants to operate reliably in ambient temperatures down to -40°C in regions like Russia.

How is the backlash controlled in a planetary drive?

Backlash is minimized to ≤ 3 arc-minutes by utilizing high-precision CNC gear grinding to achieve DIN 6 accuracy classes.

What information is needed for a quotation?

Please provide the required rated torque, input speed, gear ratio, duty cycle, and the nameplate data or technical drawing of the existing unit you wish to replace.