Structured Manufacturing Data (2026)

Planetary Gear Set

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Planetary Gear Set used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Planetary Gear Set is characterized by the integration of Sun Gear and Planet Gears. In industrial production environments, manufacturers listed on CNFX commonly emphasize Alloy Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A compact, high-torque gear arrangement consisting of central sun gear, multiple planet gears, and outer ring gear.

Product Specifications

Technical details and manufacturing context for Planetary Gear Set

Definition
A planetary gear set is a critical component within drive systems (servo motor & gearbox) that provides high torque transmission, compact size, and multiple speed ratios through its unique arrangement of gears. It enables precise motion control and power transmission in various industrial applications.
Working Principle
Power enters through the sun gear, which drives the planet gears orbiting around it. The planet gears mesh with both the sun gear and the stationary or rotating ring gear, creating multiple contact points for torque distribution. Different speed ratios are achieved by fixing different components (sun, carrier, or ring) while allowing others to rotate.
Common Materials
Alloy Steel, Case-Hardened Steel, Bronze (for bushings)
Technical Parameters
  • Module (gear size), number of teeth, gear ratio, torque capacity, backlash tolerance (mm) Customizable
Components / BOM
  • Sun Gear Part
    Central driving gear that transmits power to planet gears
    Material: Case-hardened alloy steel
  • Planet Gears Part
    Multiple gears that orbit around sun gear and mesh with ring gear
    Material: Case-hardened alloy steel
  • Planet Carrier
    Holds planet gears in position and transmits output torque
    Material: Alloy steel or aluminum
  • Ring Gear Part
    Outer stationary or rotating gear that meshes with planet gears
    Material: Case-hardened alloy steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Planetary Gear Set.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 100 bar
other spec: Max torque: 5000 Nm, Max speed: 6000 rpm
temperature: -40°C to 120°C
Media Compatibility
✓ Industrial lubricants ✓ Hydraulic fluids ✓ Clean air/gas
Unsuitable: Abrasive slurry environments
Sizing Data Required
  • Required torque output (Nm)
  • Input speed (rpm)
  • Required gear ratio

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Tooth pitting and spalling
Cause: Surface fatigue due to cyclic contact stresses exceeding material endurance limit, often accelerated by inadequate lubrication, misalignment, or overloading
Planetary carrier bearing failure
Cause: Excessive radial loads causing brinelling, or inadequate lubrication leading to overheating and premature wear, frequently from improper assembly or contamination
Maintenance Indicators
  • High-pitched whining or grinding noises during operation indicating gear mesh issues or bearing degradation
  • Visible metallic particles in lubricant oil analysis or excessive vibration readings on condition monitoring equipment
Engineering Tips
  • Implement strict contamination control protocols for lubricants and maintain proper filtration to ISO 4406 cleanliness codes specific to gearbox requirements
  • Use laser alignment tools during installation and perform regular thermal imaging inspections to detect early-stage misalignment or overheating issues

Compliance & Manufacturing Standards

Reference Standards
ISO 1328-1:2013 Cylindrical gears - ISO system of flank tolerance classification DIN 3961:1978 Tolerances for cylindrical gear teeth ASTM A29/A29M-20 Standard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for
Manufacturing Precision
  • Bore diameter: +/-0.01 mm
  • Tooth profile deviation: 0.02 mm
Quality Inspection
  • Gear tooth profile measurement using coordinate measuring machine (CMM)
  • Hardness testing (Rockwell C scale) for gear teeth surfaces

Factories Producing Planetary Gear Set

Manufacturer profiles with relevant production capability in China

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What are the main advantages of a planetary gear set in machinery?

Planetary gear sets offer high torque density, compact size, and excellent load distribution due to multiple planet gears sharing the load, making them ideal for space-constrained industrial applications.

What materials are used in your planetary gear sets?

Our planetary gear sets use alloy steel and case-hardened steel for gears to ensure strength and wear resistance, with bronze bushings for smooth operation and reduced friction.

What components are included in a planetary gear set BOM?

A complete planetary gear set includes a sun gear, multiple planet gears, a planet carrier to hold the planet gears, and an outer ring gear, all precision-engineered for optimal performance.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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