---
title: "Coating Drum"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:COATING_DRUM"
  data_integrity_hash: "7137f2fa90864eaa75b91ec2fde7a4a0"
  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:COATING_DRUM"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/coating-drum.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/coating-drum"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-3.0 rpm rotational speed, 30-80°C internal temperature, 0.1-0.3 bar internal pressure"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 4.0
    unit: "rpm"
    consequence: "Centrifugal stress exceeding yield strength of 316L stainless steel (205 MPa), polymer film thermal degradation at Arrhenius kinetics with activation energy 80 kJ/mol, pressure differential exceeding ASME BPVC Section VIII design limits"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Bearing lubrication failure due to ISO VG 32 oil contamination &gt;15 μm particles"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrated oil filtration system with 10 μm absolute rating and vibration monitoring with ISO 10816-3 alarm at 4.5 mm/s RMS"
  - node_2:
      trigger: "Heating element PID controller integral windup during polymer viscosity change from 500 to 1500 cP"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Anti-windup compensation with 0.5 second reset time and viscosity feedback control using Brookfield viscometer"
bom_nodes:
  drum-shell:
    type: "component"
    urn: "URN:CNFX:ME:DRUM_SHELL"
    interface_type: "physical-logic-coupled"
  baffles:
    type: "component"
    urn: "URN:CNFX:ME:BAFFLES"
    interface_type: "physical-logic-coupled"
  drive-shaft:
    type: "component"
    urn: "URN:CNFX:ME:DRIVE_SHAFT"
    interface_type: "physical-logic-coupled"
  bearings:
    type: "component"
    urn: "URN:CNFX:ME:BEARINGS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 12944-5:2019 - CORROSION PROTECTION OF STEEL STRUCTURES BY PROTECTIVE PAINT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "CE MARKING - MACHINERY DIRECTIVE 2006/42/EC FOR SAFETY REQUIREMENTS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/coating-drum.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "ae71eccc4a0b6af1250dbb889ad60d4b58fd4947f88aa0cc2257624a35cd1567"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Coating Drum

## 1. Technical Definition
Rotating cylindrical vessel in pharmaceutical coating machines where tablets are coated with polymer films.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-3.0 rpm rotational speed, 30-80°C internal temperature, 0.1-0.3 bar internal pressure**. Failure boundary: **Structural failure at &gt;4.0 rpm centrifugal force exceeding 2.5×g, thermal degradation at &gt;95°C for &gt;30 minutes, pressure vessel rupture at &gt;0.5 bar differential pressure**, Mechanism: **Centrifugal stress exceeding yield strength of 316L stainless steel (205 MPa), polymer film thermal degradation at Arrhenius kinetics with activation energy 80 kJ/mol, pressure differential exceeding ASME BPVC Section VIII design limits**.

### 2.1 Analytical Physics Model
Governed by the **L10 Bearing Life & Fatigue Model**:

> **Primary Equation**: $L_{10} = (\frac{C}{P})^p$  
> **Engineering Impact**: Predicts mechanical lifecycle before component fatigue.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| C | Dynamic Load Rating | Engineering Constant |
| P | Equivalent Dynamic Load | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Bearing lubrication failure due to ISO VG 32 oil contamination &gt;15 μm particles | 8 | Rotational imbalance causing &gt;0.5 mm radial runout and tablet coating thickness variation &gt;±20% | Integrated oil filtration system with 10 μm absolute rating and vibration monitoring with ISO 10816-3 alarm at 4.5 mm/s RMS |
| Heating element PID controller integral windup during polymer viscosity change from 500 to 1500 cP | 8 | Temperature overshoot to 90°C causing polymer film cracking with &gt;5% tablet defect rate | Anti-windup compensation with 0.5 second reset time and viscosity feedback control using Brookfield viscometer |

## 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**: **Tablet Feeder System**, **Spray Coating System**, **Drying and Curing Oven**  
**Downstream Applications**: Film-Coated Tablets, Enteric-Coated Capsules, Sustained-Release Pellets  

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

### Q: What are the benefits of using Stainless Steel 316L for coating drums?
**A**: Stainless Steel 316L offers superior corrosion resistance, essential for pharmaceutical applications where cleanliness and material integrity are critical. It withstands harsh cleaning chemicals and maintains hygiene standards.

### Q: How do baffles in the coating drum improve tablet coating quality?
**A**: Baffles create turbulent flow inside the rotating drum, ensuring tablets tumble evenly for consistent polymer film application. This prevents clumping and achieves uniform coating thickness across all tablets.

### Q: What maintenance is required for coating drum bearings and drive shafts?
**A**: Regular lubrication and inspection of bearings and drive shafts are essential to prevent wear and ensure smooth rotation. Follow manufacturer guidelines for maintenance intervals to avoid downtime and maintain coating precision.

## 6. Manufacturing Compliance
- ISO 12944-5:2019 - CORROSION PROTECTION OF STEEL STRUCTURES BY PROTECTIVE PAINT SYSTEMS
- CE MARKING - MACHINERY DIRECTIVE 2006/42/EC FOR SAFETY REQUIREMENTS

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

### 🌐 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**: COATING_DRUM | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: ac0ffa38
