Structured Manufacturing Data (2026)

Planet Carrier

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Planet Carrier 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 Planet Carrier is characterized by the integration of Carrier Body and Planet Gear Pins/Shafts. In industrial production environments, manufacturers listed on CNFX commonly emphasize Alloy Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A structural component in planetary gear systems that holds and supports the planet gears, allowing them to rotate around the sun gear while maintaining proper alignment and spacing.

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Product Specifications

Technical details and manufacturing context for Planet Carrier

Definition
The planet carrier is a critical component within reduction gears, specifically in planetary gear arrangements. It serves as the mounting structure for the planet gears (also called planetary gears), which are the intermediate gears that mesh with both the central sun gear and the outer ring gear. The carrier rotates around the sun gear, transmitting torque and motion between the input and output shafts while providing mechanical advantage through gear reduction. Its design ensures precise positioning of the planet gears to maintain proper gear meshing and load distribution throughout the gear system.
Working Principle
The planet carrier rotates as a unit, carrying the planet gears with it. As the sun gear (input) rotates, it drives the planet gears, which in turn rotate on their own axes while being constrained by the stationary or rotating ring gear. The carrier's rotation (output) results from the combined motion of the planet gears, achieving speed reduction or torque multiplication depending on the configuration. The carrier must withstand significant radial and axial loads while maintaining rigidity to prevent gear misalignment.
Common Materials
Alloy Steel, Cast Iron, Forged Steel
Technical Parameters
  • Bore diameter for mounting on shaft (mm) Standard Spec
Components / BOM
  • Carrier Body Part
    Main structural frame that holds all components together and transmits torque
    Material: Alloy Steel
  • Planet Gear Pins/Shafts Part
    Axles on which planet gears rotate, mounted to the carrier body
    Material: Case-Hardened Steel
  • Mounting Flange Part
    Interface for connecting to input/output shafts or other components
    Material: Alloy Steel
  • Bearing Surfaces Part
    Precision-machined surfaces for supporting bearings that reduce friction on planet gear pins
    Material: Hardened Steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Planet Carrier.

heavy duty planet carrier for industrial gearboxes forged steel planetary gear carrier custom alloy steel planet gear carrier planet carrier with mounting flange design precision planet carrier for machinery manufacturing

Applied To / Applications

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

Reduction Gears
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Planetary Gear Set
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Planetary Gear Reducer
View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 500 MPa (static load capacity)
other spec: Max rotational speed: 10,000 RPM, Lubrication required: ISO VG 68-320
temperature: -40°C to 150°C (operational), up to 200°C (peak)
Media Compatibility
✓ Industrial gear oil (mineral/synthetic) ✓ Grease-lubricated systems ✓ Clean, filtered hydraulic fluid
Unsuitable: Abrasive slurry or particulate-laden environments without filtration
Sizing Data Required
  • Number of planet gears and gear module (pitch)
  • Input torque and rotational speed requirements
  • Housing bore diameter and mounting constraints

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Bearing fatigue and spalling
Cause: Cyclic loading from planetary gear operation exceeding bearing material fatigue limits, often exacerbated by inadequate lubrication or contamination
Gear tooth pitting and wear
Cause: Surface fatigue due to high contact stresses between planet gears and sun/ring gears, accelerated by misalignment, improper backlash, or lubricant breakdown
Maintenance Indicators
  • Abnormal metallic grinding or whining noise during operation indicating gear mesh issues or bearing degradation
  • Visible metal particles in lubricant or excessive vibration detected during routine monitoring
Engineering Tips
  • Implement precision alignment during installation and maintain proper gear backlash specifications to minimize uneven loading
  • Establish rigorous lubrication management including correct viscosity selection, contamination control, and regular oil analysis to detect early wear patterns

Compliance & Manufacturing Standards

Reference Standards
ISO 1328-1:2013 (Cylindrical gears - ISO system of flank tolerance classification) ANSI/AGMA 2000-A88 (Gear Classification and Inspection Handbook) DIN 3961 (Tolerances for cylindrical gear teeth)
Manufacturing Precision
  • Bore diameter: +/-0.02mm
  • Planet pin hole position tolerance: 0.05mm
Quality Inspection
  • Dimensional inspection with CMM (Coordinate Measuring Machine)
  • Hardness testing (Rockwell or Brinell scale)

Factories Producing Planet Carrier

Manufacturer profiles with relevant production capability in China

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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 materials are best for planet carriers in high-torque applications?

For high-torque applications in machinery manufacturing, forged steel or alloy steel planet carriers are recommended due to their superior strength, fatigue resistance, and ability to withstand heavy loads and stress.

How does the planet carrier affect gear system performance?

The planet carrier is critical for performance as it holds and supports the planet gears, maintaining precise alignment and spacing. A well-designed carrier ensures smooth rotation, reduces vibration, minimizes wear, and maximizes power transmission efficiency in the planetary gear system.

What maintenance is required for planet carriers?

Regular inspection for cracks, wear on bearing surfaces, and proper lubrication of planet gear pins/shafts is essential. Maintenance intervals depend on operational load and environment, but typically align with overall gearbox service schedules to prevent failure and ensure longevity.

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 for Machinery and Equipment Manufacturing.

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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