---
title: "Head Pulley/Sprocket"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:HEAD_PULLEYSPROCKET"
  data_integrity_hash: "352691f760700d19e1c8a65f73df6ee3"
  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:HEAD_PULLEYSPROCKET"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/head-pulleysprocket.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/head-pulleysprocket"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-2.5 m/s belt speed, 500-5000 N belt tension, -20°C to 80°C ambient temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 10
    unit: "life"
    consequence: "Bearing fatigue due to Hertzian contact stress exceeding 1.8 GPa, tooth bending fatigue at pitch line, belt-pulley friction coefficient drop below 0.25"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Belt misalignment &gt; 2° from pulley axis"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Self-aligning roller bearings with ±3° angular misalignment capacity"
  - node_2:
      trigger: "Chain elongation &gt; 2% beyond pitch diameter"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Hardened sprocket teeth with 55 HRC surface hardness and 0.5 mm wear allowance"
bom_nodes:
  hub:
    type: "part"
    urn: "URN:CNFX:ME:HUB"
    interface_type: "physical-logic-coupled"
  rim:
    type: "component"
    urn: "URN:CNFX:ME:RIM"
    interface_type: "physical-logic-coupled"
  lagging:
    type: "component"
    urn: "URN:CNFX:ME:LAGGING"
    interface_type: "physical-logic-coupled"
  keyway:
    type: "component"
    urn: "URN:CNFX:ME:KEYWAY"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 606:2015 - SHORT-PITCH TRANSMISSION PRECISION ROLLER CHAINS AND CHAIN WHEELS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/head-pulleysprocket.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "fa977f6e40aeca7698afd56fa4cbbe120e0fe587cc7c414e6a8e78f5535a438d"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Head Pulley/Sprocket

## 1. Technical Definition
The drive component at the top of a bucket elevator that transmits motion to the belt or chain carrying buckets.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-2.5 m/s belt speed, 500-5000 N belt tension, -20°C to 80°C ambient temperature**. Failure boundary: **Bearing L10 life &lt; 10000 hours at 1.5 m/s, tooth root stress &gt; 350 MPa for sprockets, belt slip &gt; 3% at 2000 N tension**, Mechanism: **Bearing fatigue due to Hertzian contact stress exceeding 1.8 GPa, tooth bending fatigue at pitch line, belt-pulley friction coefficient drop below 0.25**.

### 2.1 Analytical Physics Model
Governed by the **Tractive Power & Resistance Model**:

> **Primary Equation**: $P = \frac{F \cdot v}{\eta}$  
> **Engineering Impact**: Ensures motor torque capacity exceeds operational inertia.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| F | Total Tractive Resistance | Engineering Constant |
| v | Belt Speed | Engineering Constant |
| \eta | Efficiency | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Belt misalignment &gt; 2° from pulley axis | 8 | Asymmetric belt wear &gt; 1.5 mm differential across width | Self-aligning roller bearings with ±3° angular misalignment capacity |
| Chain elongation &gt; 2% beyond pitch diameter | 8 | Sprocket tooth skipping at &gt; 15 rpm | Hardened sprocket teeth with 55 HRC surface hardness and 0.5 mm wear allowance |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Bucket Elevator Frame**, **Drive Motor and Gearbox Assembly**, **Belt or Chain Tensioning System**  
**Downstream Applications**: Bulk Material Handling Systems, Grain Processing Plants, Mining Conveyor Systems  

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

### Q: What materials are available for head pulleys/sprockets?
**A**: Our head pulleys/sprockets are manufactured in carbon steel, stainless steel, and cast iron to suit different environmental conditions and load requirements in machinery manufacturing.

### Q: What are the key components in a head pulley/sprocket assembly?
**A**: The main components include the hub (center mounting), keyway (for shaft connection), lagging (traction surface), and rim (outer structure) - all designed for reliable power transmission in bucket elevators.

### Q: How does a head pulley/sprocket function in a bucket elevator system?
**A**: As the drive component at the top of the elevator, it transmits rotational motion to the belt or chain that carries buckets, providing the necessary traction and movement for material handling operations.

## 6. Manufacturing Compliance
- ISO 606:2015 - SHORT-PITCH TRANSMISSION PRECISION ROLLER CHAINS AND CHAIN WHEELS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Head Pulley/Sprocket](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/head-pulleysprocket)**

### 🌐 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**: HEAD_PULLEYSPROCKET | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 96fa0e8b
