---
title: "Planetary Gear Reducer"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:PLANETARY_GEAR_REDUCER"
  data_integrity_hash: "d267b03d1f3378776667683a4bfb71aa"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:PLANETARY_GEAR_REDUCER"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/planetary-gear-reducer.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/planetary-gear-reducer"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-150 kN·m torque, 0.1-3000 rpm input speed, -40°C to 120°C ambient temperature"
    unit: "Nm"
engineering_limits:
  max_safe_operating_point:
    value: 400
    unit: "MPa"
    consequence: "Micropitting fatigue from elastohydrodynamic lubrication breakdown at λ&lt;1, leading to asperity contact and surface-initiated spalling (ISO 15243:2017 failure mode B1)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Misalignment exceeding 0.05 mm/mm (ISO 1328-1:2013 tolerance class 6)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integral housing with machined bearing seats (IT6 tolerance), laser-aligned coupling installation"
  - node_2:
      trigger: "Lubricant viscosity drop below 68 cSt at 40°C (ISO VG 68 minimum)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Forced lubrication system with 0.3 MPa circulating oil and 10 μm filtration"
bom_nodes:
  sun-gear:
    type: "component"
    urn: "URN:CNFX:ME:SUN_GEAR"
    interface_type: "physical-logic-coupled"
  planet-gears:
    type: "component"
    urn: "URN:CNFX:ME:PLANET_GEARS"
    interface_type: "physical-logic-coupled"
  planet-carrier:
    type: "part"
    urn: "URN:CNFX:ME:PLANET_CARRIER"
    interface_type: "physical-logic-coupled"
  ring-gear-internal-gear:
    type: "component"
    urn: "URN:CNFX:ME:RING_GEAR_INTERNAL_GEAR"
    interface_type: "physical-logic-coupled"
  input-shafthousing:
    type: "component"
    urn: "URN:CNFX:ME:INPUT_SHAFTHOUSING"
    interface_type: "physical-logic-coupled"
  output-flangeshaft:
    type: "component"
    urn: "URN:CNFX:ME:OUTPUT_FLANGESHAFT"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 1328-1:2013 (CYLINDRICAL GEARS)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/AGMA 2000-A88 (GEAR CLASSIFICATION AND INSPECTION)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/planetary-gear-reducer.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "428032daec7e9181eb5b1a4885e67e6d511b8be49dd0a46ff21fc5713db8e865"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Planetary Gear Reducer

## 1. Technical Definition
A compact, high-torque gear reduction mechanism that transmits and reduces rotational speed within a slewing unit.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-150 kN·m torque, 0.1-3000 rpm input speed, -40°C to 120°C ambient temperature**. Failure boundary: **Tooth bending stress exceeds 400 MPa (ISO 6336 Grade 5 steel), Hertzian contact pressure exceeds 1500 MPa, lubricant film thickness drops below 0.1 μm (λ&lt;1 boundary lubrication)**, Mechanism: **Micropitting fatigue from elastohydrodynamic lubrication breakdown at λ&lt;1, leading to asperity contact and surface-initiated spalling (ISO 15243:2017 failure mode B1)**.

### 2.1 Analytical Physics Model
Governed by the **L10 Bearing Life & Fatigue Model**:

> **Primary Equation**: $L_{10} = (\frac{C}{P})^p$  
> **Engineering Impact**: Predicts mechanical lifecycle before component fatigue.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| C | Dynamic Load Rating | Engineering Constant |
| P | Equivalent Dynamic Load | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Misalignment exceeding 0.05 mm/mm (ISO 1328-1:2013 tolerance class 6) | 8 | Edge loading causing localized tooth flank spalling and bearing brinelling | Integral housing with machined bearing seats (IT6 tolerance), laser-aligned coupling installation |
| Lubricant viscosity drop below 68 cSt at 40°C (ISO VG 68 minimum) | 8 | Scuffing failure from boundary lubrication regime (λ&lt;1) at pitch line | Forced lubrication system with 0.3 MPa circulating oil and 10 μm filtration |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | Nm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Planet Carrier](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/planet-carrier.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Slewing Drive Unit**, **Variable Frequency Drive**, **Lubrication System**  
**Downstream Applications**: Industrial Cranes, Excavators, Wind Turbines  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What are the main advantages of using a planetary gear reducer in machinery manufacturing?
**A**: Planetary gear reducers offer high torque density in a compact design, excellent load distribution across multiple planet gears, high efficiency (typically 97-99% per stage), and precise positioning capabilities ideal for industrial machinery applications.

### Q: How does the material selection (20CrMnTi alloy steel and GCr15 bearing steel) impact performance?
**A**: Case-hardened 20CrMnTi alloy steel provides exceptional surface hardness (HRC 58-62) for wear resistance while maintaining a tough core for impact resistance. GCr15 bearing steel ensures smooth operation and longevity in high-load applications, reducing maintenance needs.

### Q: What maintenance is required for planetary gear reducers in industrial applications?
**A**: Regular lubrication with appropriate industrial gear oil, periodic inspection for wear on gear teeth and bearings, monitoring for unusual noise or vibration, and ensuring proper alignment during installation. Most units operate maintenance-free for extended periods with proper initial setup.

## 6. Manufacturing Compliance
- ISO 1328-1:2013 (CYLINDRICAL GEARS)
- ANSI/AGMA 2000-A88 (GEAR CLASSIFICATION AND INSPECTION)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Planetary Gear Reducer](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/planetary-gear-reducer)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **6** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: PLANETARY_GEAR_REDUCER | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: c45d5fbd
