---
title: "Screw Conveyor"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SCREW_CONVEYOR"
  data_integrity_hash: "af7c8b345465b1a081d02e8ac7f81b78"
  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:SCREW_CONVEYOR"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/screw-conveyor.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/screw-conveyor"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-2.5 m/s screw rotational speed, 15-45° inclination angle, 0.3-0.7 material fill factor"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 150
    unit: "MPa"
    consequence: "Torsional fatigue failure from cyclic loading exceeding yield strength, material arching due to cohesive forces exceeding gravitational component, elastic buckling from Euler critical load"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Abrasive particle size &gt;5mm at 2.5 m/s conveying velocity"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Hardened steel flights with 55 HRC minimum hardness, tungsten carbide coating on leading edges"
  - node_2:
      trigger: "Material moisture content &gt;12% by weight at 25°C"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "PTFE-coated screw surfaces with 0.04 friction coefficient, internal scrapers at 1m intervals"
bom_nodes:
  helical-screw-auger:
    type: "component"
    urn: "URN:CNFX:ME:HELICAL_SCREW_AUGER"
    interface_type: "physical-logic-coupled"
  troughtube-housing:
    type: "component"
    urn: "URN:CNFX:ME:TROUGHTUBE_HOUSING"
    interface_type: "physical-logic-coupled"
  drive-unit:
    type: "part"
    urn: "URN:CNFX:ME:DRIVE_UNIT"
    interface_type: "physical-logic-coupled"
  inlet-hopper:
    type: "component"
    urn: "URN:CNFX:ME:INLET_HOPPER"
    interface_type: "physical-logic-coupled"
  outlet:
    type: "part"
    urn: "URN:CNFX:ME:OUTLET"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/screw-conveyor.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "cce776db9ea730b3cdb9e146cafa5ea50a5811da8d0420cde16f29ce6d305d0e"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Screw Conveyor

## 1. Technical Definition
A mechanical conveying device that uses a rotating helical screw blade to move bulk materials horizontally or at an incline.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-2.5 m/s screw rotational speed, 15-45° inclination angle, 0.3-0.7 material fill factor**. Failure boundary: **Torsional shear stress exceeding 150 MPa at screw shaft, material bridging at 60° repose angle, screw deflection exceeding L/500 where L is span length**, Mechanism: **Torsional fatigue failure from cyclic loading exceeding yield strength, material arching due to cohesive forces exceeding gravitational component, elastic buckling from Euler critical load**.

### 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 |
| :--- | :--- | :--- | :--- |
| Abrasive particle size &gt;5mm at 2.5 m/s conveying velocity | 8 | Helical flight wear rate exceeding 0.5 mm/1000 operating hours | Hardened steel flights with 55 HRC minimum hardness, tungsten carbide coating on leading edges |
| Material moisture content &gt;12% by weight at 25°C | 8 | Material adhesion forming 50mm thick buildup on screw surface | PTFE-coated screw surfaces with 0.04 friction coefficient, internal scrapers at 1m intervals |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Bulk Material Feeder**, **Industrial Gearbox**, **Dust Collection System**  
**Downstream Applications**: Cement, Animal Feed, Plastic Pellets  

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

### Q: What materials can a screw conveyor handle?
**A**: Screw conveyors efficiently move bulk materials like grains, powders, pellets, and aggregates in machinery manufacturing applications.

### Q: What's the difference between carbon steel and stainless steel screw conveyors?
**A**: Carbon steel offers cost-effective durability for general materials, while stainless steel provides corrosion resistance for food-grade, chemical, or moist applications.

### Q: Can screw conveyors operate at an incline?
**A**: Yes, screw conveyors can be configured for horizontal or inclined material transport, though efficiency decreases as the incline angle increases.

## 6. Manufacturing Compliance

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

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

> **Reference ID**: SCREW_CONVEYOR | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: b2a5cbdf
