---
title: "Crosshead"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:CROSSHEAD"
  data_integrity_hash: "a93e57e9c0a0f6c6635f01bfaff5021d"
  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:CROSSHEAD"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/crosshead.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/crosshead"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-150 MPa axial load, -40°C to 150°C temperature, 0.5-3.0 m/s linear velocity"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 450
    unit: "MPa"
    consequence: "Hertzian contact stress exceeding material yield point at crosshead-pin interface (σ_max = 0.6√(PE/R) where P=load, E=modulus, R=radius), leading to plastic deformation and seizure"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Insufficient lubrication film thickness (h &lt; 1.5×Rq surface roughness)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Forced lubrication system with 0.1 μm filtration and minimum 25 bar supply pressure"
  - node_2:
      trigger: "Misalignment exceeding 0.05 mm/m between crosshead guide and crankshaft centerline"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Laser-aligned installation with 0.01 mm/m tolerance and spherical seat bearings"
bom_nodes:
  crosshead-body:
    type: "part"
    urn: "URN:CNFX:ME:CROSSHEAD_BODY"
    interface_type: "physical-logic-coupled"
  wrist-pin-crosshead-pin:
    type: "component"
    urn: "URN:CNFX:ME:WRIST_PIN_CROSSHEAD_PIN"
    interface_type: "physical-logic-coupled"
  crosshead-shoe-slipper:
    type: "component"
    urn: "URN:CNFX:ME:CROSSHEAD_SHOE_SLIPPER"
    interface_type: "physical-logic-coupled"
  tie-rods-studs:
    type: "component"
    urn: "URN:CNFX:ME:TIE_RODS_STUDS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 (QUALITY MANAGEMENT SYSTEMS)"
    scope: "Verified Engineering Specification"
  - standard: "CE MARKING (EU MACHINERY DIRECTIVE 2006/42/EC)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/crosshead.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "c451fdd11696671fe4826a9c5129f56f78fede4b1440620f1d6e63a528062987"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Crosshead

## 1. Technical Definition
A reciprocating component in a pump's power end that converts the rotary motion of the crankshaft into linear motion for the plunger or piston.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-150 MPa axial load, -40°C to 150°C temperature, 0.5-3.0 m/s linear velocity**. Failure boundary: **Yield strength exceedance at 450 MPa (ASTM A276 316 stainless steel), 0.15 mm radial clearance threshold, 200°C thermal expansion limit**, Mechanism: **Hertzian contact stress exceeding material yield point at crosshead-pin interface (σ_max = 0.6√(PE/R) where P=load, E=modulus, R=radius), leading to plastic deformation and seizure**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Insufficient lubrication film thickness (h &lt; 1.5×Rq surface roughness) | 8 | Boundary lubrication regime transition causing adhesive wear and scoring | Forced lubrication system with 0.1 μm filtration and minimum 25 bar supply pressure |
| Misalignment exceeding 0.05 mm/m between crosshead guide and crankshaft centerline | 8 | Edge loading producing 3.2× nominal contact stress (σ_edge = σ_nominal × √(a/b) where a=contact width, b=effective width) | Laser-aligned installation with 0.01 mm/m tolerance and spherical seat bearings |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Lubrication System**, **Cooling System**, **Alignment Fixture**  
**Downstream Applications**: Reciprocating Pumps, High-Pressure Plunger Pumps, Hydraulic Fracturing Pumps  

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

### Q: What materials are best for crossheads in heavy-duty pump applications?
**A**: Forged steel offers superior strength for high-pressure applications, ductile iron provides excellent wear resistance, and alloy steel balances durability with cost-effectiveness for demanding machinery environments.

### Q: How does a crosshead convert rotary motion to linear motion in pumps?
**A**: The crosshead connects to the crankshaft via the wrist pin, translating rotational force into reciprocating linear motion that drives the plunger or piston, creating the pumping action in the fluid end.

### Q: What maintenance is required for crosshead assemblies in industrial pumps?
**A**: Regular inspection of crosshead shoes/slippers for wear, checking tie rod torque specifications, monitoring wrist pin lubrication, and ensuring proper alignment to prevent premature failure in machinery equipment.

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

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Crosshead](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/crosshead)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: CROSSHEAD | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 4932a21e
