---
title: "Cross Spider"
industry: "Motor Vehicle Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:CROSS_SPIDER"
  data_integrity_hash: "b81db87846b7861e8b90ea80dc83d45a"
  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:CROSS_SPIDER"
  data_source_uri: "https://cnfx.com/llms/industry/motor-vehicle-manufacturing/product/cross-spider.md"
  official_resource_url: "https://cnfx.com/industry/motor-vehicle-manufacturing/product/cross-spider"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-300 N·m torque transmission, 0-45° angular misalignment, -40°C to 120°C temperature range"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 350
    unit: "MPa"
    consequence: "Hertzian contact fatigue at needle bearing interfaces due to cyclic loading exceeding material endurance limit (SAE 8620 steel: 620 MPa ultimate tensile strength)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Insufficient lubrication film thickness (&lt;1 μm) at needle bearing interfaces"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Forced lubrication system with 0.15 mm diameter oil passages and 200 kPa minimum pressure"
  - node_2:
      trigger: "Dynamic imbalance exceeding 15 g·mm at operating speeds &gt;3000 RPM"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Balancing to ISO 1940 G6.3 standard with 5 μm maximum runout tolerance"
bom_nodes:
  journaltrunnion:
    type: "component"
    urn: "URN:CNFX:ME:JOURNALTRUNNION"
    interface_type: "physical-logic-coupled"
  central-bodyhub:
    type: "component"
    urn: "URN:CNFX:ME:CENTRAL_BODYHUB"
    interface_type: "physical-logic-coupled"
  grease-passage:
    type: "component"
    urn: "URN:CNFX:ME:GREASE_PASSAGE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "CE MARKING - MACHINERY DIRECTIVE 2006/42/EC"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/motor-vehicle-manufacturing/product/cross-spider.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "7f660058241f78b43e4be7ea9ee4d03760798b23778a15447835f6e3d1d6d492"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Cross Spider

## 1. Technical Definition
A central connecting component in a universal joint assembly that transmits torque between intersecting shafts.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-300 N·m torque transmission, 0-45° angular misalignment, -40°C to 120°C temperature range**. Failure boundary: **Shear stress exceeding 350 MPa at spider arms, contact pressure exceeding 1.2 GPa at bearing surfaces, angular deflection exceeding 50°**, Mechanism: **Hertzian contact fatigue at needle bearing interfaces due to cyclic loading exceeding material endurance limit (SAE 8620 steel: 620 MPa ultimate tensile strength)**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Insufficient lubrication film thickness (&lt;1 μm) at needle bearing interfaces | 8 | Accelerated wear and spalling of spider arm bearing surfaces | Forced lubrication system with 0.15 mm diameter oil passages and 200 kPa minimum pressure |
| Dynamic imbalance exceeding 15 g·mm at operating speeds &gt;3000 RPM | 8 | Resonant vibration leading to spider arm fatigue fracture at stress concentrators | Balancing to ISO 1940 G6.3 standard with 5 μm maximum runout tolerance |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Forging Press**, **Heat Treatment Furnace**, **CNC Machining Center**  
**Downstream Applications**: Automotive Driveshaft Assembly, Industrial Power Transmission System, Agricultural Equipment Driveline  

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

### Q: What is the primary function of a Cross Spider in motor vehicle manufacturing?
**A**: The Cross Spider serves as the central connecting component in universal joint assemblies, transmitting rotational torque between intersecting drive shafts while accommodating angular misalignment in vehicle drivetrains.

### Q: Why is alloy steel used for Cross Spider manufacturing?
**A**: Alloy steel provides optimal strength-to-weight ratio, fatigue resistance, and durability required for high-torque applications in motor vehicles, ensuring reliable performance under continuous stress and varying operating conditions.

### Q: How does the grease passage design in a Cross Spider enhance performance?
**A**: Integrated grease passages facilitate proper lubrication distribution to journal/trunnion bearing surfaces, reducing friction, preventing premature wear, and extending service life of the universal joint assembly.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS
- CE MARKING - MACHINERY DIRECTIVE 2006/42/EC

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Cross Spider](https://cnfx.com/industry/motor-vehicle-manufacturing/product/cross-spider)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: CROSS_SPIDER | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 48a53219
