Ever-Power — Hangzhou, China

High-Precision
Planetary Gearbox
Manufacturer

We engineer planetary gear reducers for robotics, wind energy, construction, and industrial automation — exported to 60+ countries worldwide.

Working Principle

How Does a Planetary Gearbox Work?

A planetary gearbox transmits power through a coaxial gear system — the motor drives a central sun gear, which meshes with orbiting planet gears inside a fixed ring gear. The planet carrier collects the output at reduced speed and multiplied torque. This planetary gearbox working principle enables the highest torque density of any gear reducer design.

1
Sun Gear
Central input driven by motor shaft at high speed
2
Planet Gears
3–6 gears orbit and share load evenly
3
Ring Gear
Fixed housing enables speed reduction
4
Carrier Output
Delivers high torque at reduced speed
How a planetary gearbox works - sun gear planet gears ring gear and carrier
Planetary gearbox internal gear structure showing sun gear planet gears and ring gear

Working Principle

What Is a Planetary Gearbox?

A planetary gearbox is a gear system where multiple planet gears orbit around a central sun gear inside a fixed ring gear. This coaxial design delivers high torque density, compact size, and excellent efficiency — making it the preferred gear reducer for precision motion control.

Up to 97% Efficiency Low Backlash ≤1 Arcmin Ratio up to 1000:1

Sun Gear, Planet Gears & Ring Gear

The motor drives the sun gear, planet gears orbit and share the load evenly, and the carrier outputs high torque at reduced speed — all in a compact inline package.

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Planetary gear reducer cutaway showing sun gear and planet gears

Our Products

Planetary Gearbox Types

We offer a complete range of planetary gear reducers and drives — engineered for every torque, speed, and mounting requirement across industries.

Key Advantages

Why Choose Planetary Gearboxes?

The planetary gearbox outperforms other reducer types across nearly every critical metric — here's why engineers worldwide specify planetary gear reducers for their most demanding applications.

High Torque Density
Maximum power in a compact, lightweight package
98% Efficiency
Minimized energy loss per rotation stage
Ultra-Low Backlash
As low as 1 arcmin for precision control
Even Load Distribution
Multi-gear contact shares stress equally
High Precision & Rigidity
CNC-machined gears for repeatable accuracy
Multi-Stage Options
Ratios from 3:1 up to 1000:1 available
Ever-Power planetary gearbox factory Hangzhou China

Applications of planetary gearboxes in Medical Diagnostic Equipment

Medical Imaging · Diagnostic Equipment Drive Systems Medical diagnostic equipment — CT scanners, MRI patient positioners, X-ray gantries, ultrasound probe actuators, and blood-analysis instruments — relies on precision drive systems to position patients, sensors, and...

Applications of planetary gearboxes in Laboratory Automation Systems

Lab Automation · Precision Sample Handling DrivesHigh-throughput laboratory automation systems — liquid handlers, plate movers, centrifuge loaders, and robotic sample processors — rely on miniature planetary gearboxes to position pipettes, plates, and tubes with...

Applications of planetary gearboxes in Precision Test Instrument Drives

Metrology & Testing · Precision Instrument Drive SystemsPrecision test instruments — coordinate measuring machines (CMMs), surface profilometers, optical test benches, torque calibrators, and material-testing systems — demand drive components that contribute...

Applications of planetary gearboxes in Surgical Robot Joint Actuators

Medical Robotics · Surgical Robot Joint Drive TechnologySurgical robots translate a surgeon's hand movements into scaled, tremor-filtered motions at the instrument tip, enabling minimally invasive procedures with sub-millimeter accuracy. Each robotic joint — six to...

Applications of planetary gearboxes in Medical Diagnostic Equipment Drives

Medical Imaging · Diagnostic Equipment Drive SystemsMedical diagnostic equipment — CT scanners, MRI patient positioners, X-ray gantries, ultrasound probe actuators, and blood-analysis instruments — relies on precision drive systems to position patients, sensors, and...

Applications of planetary gearboxes in Combine Harvester Drive Systems

Agricultural Technology · Combine Harvester Drive SystemsCombine harvesters integrate cutting, threshing, separating, and grain-cleaning functions into a single self-propelled machine that must operate reliably through intense seasonal harvest windows. Planetary...

Applications of planetary gearboxes in Tractor Drive Axle and PTO Systems

Agricultural Power · Tractor Axle & PTO Drive TechnologyTractors deliver power to implements through the PTO (Power Take-Off) shaft and to the ground through drive axle hub reductions. Both systems use planetary gearboxes to multiply engine torque into the forces...

Applications of planetary gearboxes in Seeder and Mower Transmissions

Precision Agriculture · Seeder & Mower Drive Systems Seeders and mowers represent two of the highest-volume implement categories in agriculture, each placing distinct demands on their drive gearboxes. Seeders require precise, low-speed metering drives for uniform...

Applications of planetary gearboxes in Round Baler Drive Systems

Hay & Forage · Round Baler Drive Technology Round balers compress cut hay, straw, or silage into tightly rolled cylindrical bales weighing 300 to 700 kg each. The baling process demands high sustained torque from the pickup, chamber rollers, and net-wrap...

Applications of planetary gearboxes in Agricultural Drone Drives

Precision Agriculture · Drone Sprayer Drive TechnologyAgricultural spray drones deliver crop-protection chemicals with GPS-guided precision, reducing chemical usage by 30–50% compared to ground-based spraying while accessing terrain that tractors cannot reach. The...
Ever-Power planetary gearbox team and global clients

Testimonials

What Our Clients Say

★★★★★

"We've been sourcing planetary gearboxes from Ever-Power for over 5 years. Their precision reducers consistently meet our ≤3 arcmin backlash requirement — quality rivals European brands at a fraction of the cost."

TM
Thomas Müller
Chief Engineer, Robotics Division — Germany
★★★★★

"The helical planetary gearboxes we ordered for our AGV fleet exceeded expectations. Extremely low noise, smooth operation, and the 15-day delivery was faster than any supplier we've worked with."

KT
Kenji Tanaka
Logistics Automation Manager — Japan
★★★★★

"Ever-Power's engineering team helped us select the right multi-stage planetary gearbox for our solar tracker project. Their torque calculation assistance saved us weeks of R&D time."

AF
Ahmed Al-Farsi
Project Director, Solar Energy — UAE
★★★★★

"We replaced our worm gearboxes with Ever-Power planetary reducers and saw 30% less energy consumption and far better positioning accuracy on our packaging line. Highly recommended."

MS
Maria Santos
Plant Operations Manager — Brazil
★★★★★

"Outstanding OEM partner. They customized flange dimensions to match our servo motors perfectly. The planetary gearboxes have been running 24/7 for 18 months with zero downtime."

DC
David Chen
VP of Manufacturing — Taiwan