---
title: "Vibratory Drum"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:VIBRATORY_DRUM"
  data_integrity_hash: "69bc1db0712e42cb316ba09bbc3ddf36"
  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:VIBRATORY_DRUM"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/vibratory-drum.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/vibratory-drum"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-2.5 mm vibration amplitude at 25-70 Hz frequency, 150-400 kN centrifugal force"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 3.0
    unit: "mm"
    consequence: "Resonant fatigue failure due to harmonic excitation at natural frequency (45-55 Hz range) causing stress concentration exceeding 350 MPa yield strength of SAE 4140 steel"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Unbalanced eccentric mass assembly with 0.1 mm radial runout tolerance violation"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Dynamic balancing to ISO 1940 G6.3 standard with 0.05 mm maximum runout tolerance"
  - node_2:
      trigger: "Insufficient lubrication flow rate below 2.5 L/min at 40°C oil temperature"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Positive displacement gear pump with 3.0 L/min minimum flow and 60°C thermal cutoff switch"
bom_nodes:
  drum-shell:
    type: "component"
    urn: "URN:CNFX:ME:DRUM_SHELL"
    interface_type: "physical-logic-coupled"
  eccentric-shaft:
    type: "component"
    urn: "URN:CNFX:ME:ECCENTRIC_SHAFT"
    interface_type: "physical-logic-coupled"
  bearings:
    type: "part"
    urn: "URN:CNFX:ME:BEARINGS"
    interface_type: "physical-logic-coupled"
  vibration-isolation-mounts:
    type: "part"
    urn: "URN:CNFX:ME:VIBRATION_ISOLATION_MOUNTS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/vibratory-drum.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "6e3632ee1d66f86a5158cae359174b052c8e147b7325e39bdb0df26d4a804e38"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Vibratory Drum

## 1. Technical Definition
The cylindrical component of a vibratory roller that directly contacts and compacts soil or asphalt through vibration.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-2.5 mm vibration amplitude at 25-70 Hz frequency, 150-400 kN centrifugal force**. Failure boundary: **Exceeding 3.0 mm vibration amplitude at resonant frequency (45-55 Hz) or operating above 80°C bearing temperature**, Mechanism: **Resonant fatigue failure due to harmonic excitation at natural frequency (45-55 Hz range) causing stress concentration exceeding 350 MPa yield strength of SAE 4140 steel**.

### 2.1 Analytical Physics Model
Governed by the **Harmonic Vibration Force Generation**:

> **Primary Equation**: $F_e = m \cdot r \cdot \omega^2 \sin(\omega t)$  
> **Engineering Impact**: Calculates centrifugal force for vibratory sifters/feeders.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| m | Eccentric Mass | Engineering Constant |
| r | Radius | Engineering Constant |
| \omega | Angular Frequency | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Unbalanced eccentric mass assembly with 0.1 mm radial runout tolerance violation | 8 | Accelerated bearing wear leading to 0.5 mm radial play in drum shaft | Dynamic balancing to ISO 1940 G6.3 standard with 0.05 mm maximum runout tolerance |
| Insufficient lubrication flow rate below 2.5 L/min at 40°C oil temperature | 8 | Journal bearing seizure at 120°C localized temperature | Positive displacement gear pump with 3.0 L/min minimum flow and 60°C thermal cutoff switch |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Bearings](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/bearings.md) `(Standalone System)`
- [Vibration Isolation Mounts](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/vibration-isolation-mounts.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Vibratory Roller Chassis**, **Hydraulic Power Unit**, **Control System Console**  
**Downstream Applications**: Compacted Road Base, Asphalt Pavement Layers, Foundation Soil Compaction  

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

### Q: What materials are used in vibratory drum construction?
**A**: Vibratory drums are typically constructed from high-strength steel for durability and resistance to wear during soil and asphalt compaction operations.

### Q: How does the eccentric shaft function in a vibratory drum?
**A**: The eccentric shaft creates controlled vibration by rotating off-center weights, generating the oscillating force that enables effective compaction of materials.

### Q: What maintenance do vibratory drum bearings require?
**A**: Regular lubrication and inspection for wear are essential. Bearings should be checked periodically for proper alignment and replaced when showing signs of excessive play or damage.

## 6. Manufacturing Compliance

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Vibratory Drum](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/vibratory-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**: VIBRATORY_DRUM | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 4880f309
