---
title: "Roll Shell/Cylinder"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:ROLL_SHELLCYLINDER"
  data_integrity_hash: "9107a76de84f6120adc93501883bf685"
  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:ROLL_SHELLCYLINDER"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/roll-shellcylinder.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/roll-shellcylinder"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-3.0 MPa contact pressure, 20-120°C surface temperature, 0.1-5.0 m/s tangential velocity"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 250
    unit: "MPa"
    consequence: "Plastic deformation from Hertzian contact stress exceeding material yield strength, thermal fatigue from cyclic heating above 180°C causing martensite formation, surface spalling from subsurface shear stress exceeding 0.58×yield strength"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Misalignment exceeding 0.05 mm/m between roll axes"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Laser alignment system with 0.01 mm/m precision and automatic correction feedback loop"
  - node_2:
      trigger: "Coolant flow reduction below 2.0 L/min per 100 mm roll width"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Redundant cooling circuits with flow sensors triggering at 1.8 L/min threshold"
bom_nodes:
  shell-body:
    type: "component"
    urn: "URN:CNFX:ME:SHELL_BODY"
    interface_type: "physical-logic-coupled"
  surface-coating:
    type: "component"
    urn: "URN:CNFX:ME:SURFACE_COATING"
    interface_type: "physical-logic-coupled"
  end-journals:
    type: "component"
    urn: "URN:CNFX:ME:END_JOURNALS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 286-2:2010 (CYLINDRICAL FITS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/roll-shellcylinder.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "c7fd6eb52af33f5e05aff40c303e6da50137f4ab9f14617fd54034463bdade08"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Roll Shell/Cylinder

## 1. Technical Definition
The cylindrical outer casing of a nip roll that provides structural integrity and surface contact for material processing.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-3.0 MPa contact pressure, 20-120°C surface temperature, 0.1-5.0 m/s tangential velocity**. Failure boundary: **Yield strength exceedance at 250 MPa (SAE 1045 steel), surface temperature &gt;180°C causing phase transformation, Hertzian contact stress &gt;1.5 GPa**, Mechanism: **Plastic deformation from Hertzian contact stress exceeding material yield strength, thermal fatigue from cyclic heating above 180°C causing martensite formation, surface spalling from subsurface shear stress exceeding 0.58×yield strength**.

### 2.1 Analytical Physics Model
Governed by the **Thin-Wall Pressure Vessel Stress Analysis**:

> **Primary Equation**: $\sigma_h = \frac{P \cdot D}{2t}$  
> **Engineering Impact**: Determines the hoop stress boundary to prevent rupture.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| P | Internal Pressure | Engineering Constant |
| D | Diameter | Engineering Constant |
| t | Wall Thickness | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Misalignment exceeding 0.05 mm/m between roll axes | 8 | Edge loading causing localized Hertzian stress concentration &gt;2.0 GPa | Laser alignment system with 0.01 mm/m precision and automatic correction feedback loop |
| Coolant flow reduction below 2.0 L/min per 100 mm roll width | 8 | Surface temperature gradient &gt;50°C/mm causing thermal stress cracking | Redundant cooling circuits with flow sensors triggering at 1.8 L/min threshold |

## 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**: **Hydraulic Power Unit**, **Temperature Control System**, **Material Feeding System**  
**Downstream Applications**: Paper Products, Textile Fabrics, Plastic Films  

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

### Q: What are the main components in a roll shell BOM?
**A**: The bill of materials for a roll shell typically includes end journals for mounting, the shell body as the main cylindrical structure, and surface coating for durability and performance.

### Q: Which material is best for corrosive environments?
**A**: Stainless steel roll shells offer excellent corrosion resistance, making them ideal for wet processing applications or environments with chemical exposure.

### Q: How does surface coating affect roll performance?
**A**: Surface coatings like chrome plating, ceramic coatings, or polyurethane provide specific benefits including wear resistance, friction control, thermal properties, and material release characteristics for different processing applications.

## 6. Manufacturing Compliance
- ISO 286-2:2010 (CYLINDRICAL FITS)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Roll Shell/Cylinder](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/roll-shellcylinder)**

### 🌐 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**: ROLL_SHELLCYLINDER | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 03cfa67e
