🏗️ Heavy-Duty & High-Impact Transmission
Construction & Mining Machinery
High-torque, impact-resistant gears, girth rings, and planetary drive sets engineered for excavators, cranes, drilling rigs, and heavy mining crushers.
custom planetary gear set manufacturer
Custom Planetary Gear Sets
High-torque density planetary gear assemblies engineered with micro-geometry tooth crowning and matched multi-pinion load sharing for precision reducers.
Customization
100% to CAD / Sample
Precision Grade
DIN 4-7 / AGMA 11-13
DFM Analysis
< 24 Hours Turnaround
Quality System
ISO 9001:2015
Product overview
Custom Planetary Gear Sets manufacturing starts with confirmed technical requirements.
Review the gear pair, assembly conditions, drawing requirements, specification checks, and inspection points before requesting a quotation.
Planetary gear mechanisms (epicyclic gear trains) provide exceptional torque-to-weight ratios, high torsional rigidity, and balanced radial loads by sharing transmitted power across multiple planet gears (typically 3, 4, or 5). ZhongYi manufactures custom planetary gear sets to engineering drawings, CAD models, or reverse-engineered samples. Our complete manufacturing scope covers input sun gears (integral with input shafts or splined bores), precision planet pinions with hardened and ground needle roller bearing bores, rigid planet carriers (precision machined on multi-axis CNC centers), and internal ring gears (internally shaped, broached, or ground). To ensure equal load sharing across all planets and prevent localized stress, we apply CNC micro-geometry profile crowning and lead modification (Fα/Fβ correction) and group planet pinions in tightly matched sets.
Tooth Accuracy DIN 5-7 / AGMA 11-13
Tooth Finishing CNC Ground (Ra ≤0.4µm)
Hardness Grade Carburized 58-62 HRC
Custom Planetary Gear Sets Factory Genuine Spec
Selection guidance
How to specify a custom planetary gear sets for quotation.
Use application and mating-component data to confirm geometry, materials, mounting details, and the acceptance plan.
Verify the planetary kinematic assembly condition before finalizing tooth numbers: the sum of the sun teeth (Z_sun) and internal ring teeth (Z_ring) must be divisible by the number of planet gears (N_planets) for equally spaced planet pins. Confirm input speed, continuous rated torque, peak emergency stop torque, thermal dissipation, and backlash requirements. For replacement gearboxes, supply both the sun, planets, carrier pin center distance, and internal ring to ensure correct meshing and backlash clearance.
Technical specifications
Core technical parameters for engineering and procurement review.
| Kit components | Central sun gear, 3 to 5 planet pinions, planetary carrier, and internal ring gear |
|---|---|
| Manufacturing basis | Customer 2D/3D engineering prints, CAD step models, or transmission gearbox samples |
| Module & Pitch | Module M0.5 to M12 (DP 48 to DP 2) with 20° or 25° pressure angles |
| Accuracy grades | DIN 5 to DIN 7 / ISO Grade 5-7 CNC tooth flank profile ground |
| Heat treatment | Case carburizing & quenching (HRC 58-62) with effective case depth 0.6 - 2.5 mm |
| Backlash options | Ultra-precision (< 3 arcmin), Precision (< 5 arcmin), Standard (< 10 arcmin) |
Custom options
Manufacturing details that can be reviewed before quotation.
- Single-stage (3:1 to 10:1) and multi-stage (up to 1000:1) epicyclic gear train kits
- Micro-geometry tooth flank crowning and tip relief to optimize dynamic load distribution
- Needle roller bearing journals, pre-fitted caged bearings, or solid bronze bushings
- Integral input sun pinion shafts with splined, keyed, or motor clamping interfaces
- Matched planet gear weight and tooth thickness grouping for high-speed dynamic balance
Quality control
Inspection points tied to the approved technical file.
- CMM inspection of carrier pin hole true position, parallelism, and pitch circle runout
- CNC gear measuring center check of sun and planet profile (Fα), lead (Fβ), and pitch error (Fp)
- Double-flank gear rolling inspection of composite radial runout and center distance backlash
- Metallurgical micro-indentation hardness testing of case depth, surface hardness, and core strength
All products can be custom manufactured from 2D/3D CAD drawings or physical samples.
Quality Control & Inspection Matrix
Engineering Evidence & 100% Inspection for Custom Planetary Gear Sets.
Overseas procurement teams require verifiable technical data, not unsupported claims. Every production batch at ZhongYi is inspected against approved CAD blueprints and international standards (DIN, AGMA, ISO).
Component-Specific Quality Focus:
Planetary gear set components are manufactured and inspected as synchronized kinematic assemblies. Quality documentation covers individual gear CMM reports, carrier pin hole coordinate verification, case-carburizing depth charts, tooth contact pattern checks, and grouped planet pinion matching certificates.
Zeiss / Hexagon 3D CMM
Validates 3D spatial GD&T, bore concentricity, center distance, and geometric tolerances down to ±0.002 mm.
Klingelnberg CNC Gear Analyzer
Inspects involute tooth profile error (fα), lead crowning (fβ), pitch cumulative error (Fp), and radial runout (Fr).
Digital Micro-Vickers & Rockwell Testers
Verifies surface hardness (58–62 HRC), core toughness, and effective carburized / nitrided case depth gradient.
Direct-Reading Optical Spectrometer
100% chemical composition verification of alloy steel forgings (20CrMnTi, 42CrMo, 18CrNiMo7-6, Stainless, POM).
Inspection Deliverables with Every Shipment
Complete Batch Traceability & Certified Test Reports
- EN 10204 Type 3.1 Mill Test Certificate (Chemical & Mechanical Properties)
- Zeiss 3D CMM Full Dimensional Inspection Sheet
- Klingelnberg Tooth Profile & Lead Crowning Graph Report
- Effective Carburized Case Depth & Hardness Curve Data
- 100% Pre-Shipment Visual, Thread & Anti-Rust Quality Verification
Our Factory Quality Commitment:
We maintain strict incoming material spectroscopy, in-process CNC tooth coordinate monitoring, and 100% final pre-shipment dimensional inspection. All custom gear batches are backed by our full manufacturing warranty.
ISO 9001:2015 Certified
DIN 4-7 / AGMA 11-13 Standards
Applications
Custom Planetary Gear Sets operating environments.
Confirm load, speed, duty cycle, environment, lubrication, and assembly constraints before selecting the final material and manufacturing route.
- High-precision servo planetary gearboxes for robotics, AGVs, and CNC automation
- Hydraulic and electric final wheel drives, track drives, and winch reducers for construction machinery
- Slew drives and swing reducers for excavators, aerial work platforms, and mobile cranes
- Wind turbine pitch and yaw drive gearboxes, agricultural tractor transmissions
Application Markets
View All 5 Industry Hubs →
Where Custom Planetary Gear Sets Are Engineered & Deployed
Discover how this gear category meets extreme torque, low backlash, quiet operation, and weather-resistance demands in primary industry sectors:
🌬️ 20-Year Outdoor Longevity & High Wind Torque
Renewable Energy
Heavy-torque yaw/pitch gears, slewing ring drives, and precision worm drives engineered for 20-year service life in wind turbines and solar tracking fields.
Technical FAQ
Common questions before ordering custom planetary gear sets products.
Critical specifications are confirmed against final drawings before production.
Why is planet gear tooth crowning critical in planetary gearboxes? ▼
Under heavy torque, the planet carrier experiences elastic torsional deflection, which causes planet gear shafts to tilt slightly. Micro-geometry lead crowning (barrel-shaped tooth flanks) prevents severe edge loading, distributes stress evenly across the tooth face, and dramatically increases gearbox fatigue life.
Can ZhongYi manufacture individual replacement planet gears for an existing drive? ▼
Yes, but for optimal load sharing and low noise, we recommend replacing the entire planet set (all 3, 4, or 5 pinions) together. This ensures identical tooth thickness, base pitch, and bearing bore tolerances across all driving paths.
What materials are recommended for heavy-duty planetary gears? ▼
We recommend premium vacuum-degassed case-carburizing alloy steels such as 20CrMnTi, 18CrNiMo7-6 (DIN 1.6587), or AISI 8620. These steels achieve HRC 58-62 surface hardness for exceptional pitting resistance while maintaining a tough, shock-resistant core (HRC 32-40).
24-Hour Engineering Quote & DFM Review
Upload Your Drawings for Custom Planetary Gear Sets Manufacturing
Send your 2D blueprints or 3D CAD models. Our senior gear engineering team will review tooth geometry, module/pitch, materials, heat treatment feasibility, and provide transparent factory pricing within 24 hours.
Supported CAD Blueprint & Drawing Formats:
STEP (.step / .stp) AutoCAD (.dwg / .dxf) IGES (.igs) SolidWorks / 3D CAD PDF Technical Blueprints Worn Physical Samples
Mutual NDA Protection
We sign strict Non-Disclosure Agreements to safeguard proprietary designs.
< 24h DFM Feedback
Rapid manufacturability review, tolerance checks, and unit quotation.
Direct Factory Engineering
Direct technical communication with senior master gear artisans.
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