Industry-Verified Manufacturing Data (2026)

Eccentric Weight Assembly

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Eccentric Weight Assembly used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Eccentric Weight Assembly is characterized by the integration of Eccentric Weight and Shaft. In industrial production environments, manufacturers listed on CNFX commonly emphasize High-strength alloy steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A rotating mass assembly that generates centrifugal force for vibration in compaction equipment.

Product Specifications

Technical details and manufacturing context for Eccentric Weight Assembly

Definition
The eccentric weight assembly is a critical component of a vibratory roller that creates the vibratory force necessary for soil and asphalt compaction. It consists of eccentric weights mounted on a rotating shaft that, when spun at high speeds, generates centrifugal force to produce vibrations transmitted through the roller drum.
Working Principle
The assembly rotates via a hydraulic motor or mechanical drive, creating an unbalanced centrifugal force due to the offset mass distribution of the eccentric weights. This force causes the roller drum to vibrate at specific frequencies and amplitudes, enhancing compaction efficiency by reducing air voids in the material being compacted.
Common Materials
High-strength alloy steel
Technical Parameters
  • Eccentric moment (mass × eccentricity distance) (kg·m) Per Request
Components / BOM
  • Eccentric Weight
    Provides offset mass to create centrifugal force
    Material: High-strength alloy steel
  • Shaft
    Supports and rotates the eccentric weights
    Material: Hardened steel
  • Bearing Housing
    Contains bearings for smooth shaft rotation
    Material: Cast iron or steel
  • Drive Coupling
    Connects to hydraulic motor or drive system
    Material: Steel alloy
Engineering Reasoning
1500-3600 RPM rotational speed, 0.5-12.5 kN centrifugal force
Material yield strength exceeded at 15 kN centrifugal force or 4000 RPM rotational speed
Design Rationale: Fatigue failure from cyclic stress exceeding 250 MPa at stress concentration points during unbalanced rotation
Risk Mitigation (FMEA)
Trigger Bearing lubrication degradation below 0.1 mm oil film thickness
Mode: Shaft seizure at 180°C bearing temperature
Strategy: Forced lubrication system with 0.3 MPa pressure and 40 μm filtration
Trigger Mass imbalance exceeding 15 g·mm eccentricity tolerance
Mode: Resonant vibration at 85 Hz natural frequency
Strategy: Dynamic balancing to 2.5 g·mm residual unbalance with ISO 1940 G6.3 grade

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Eccentric Weight Assembly.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric (non-pressurized)
other spec: Max rotational speed: 3000 RPM, Vibration frequency: 10-100 Hz
temperature: -20°C to 120°C
Media Compatibility
✓ Soil compaction ✓ Concrete vibration ✓ Industrial material separation
Unsuitable: Submerged or high-moisture environments without proper sealing
Sizing Data Required
  • Required centrifugal force (N)
  • Operating frequency (Hz)
  • Equipment mounting configuration

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Bearing fatigue failure
Cause: Cyclic loading from eccentric rotation exceeding bearing fatigue limits, often accelerated by improper lubrication or misalignment
Weight attachment failure
Cause: Fatigue cracking at fastener points due to vibration-induced stress concentration, potentially worsened by corrosion or improper torque
Maintenance Indicators
  • Abnormal vibration patterns or audible knocking during operation
  • Visible misalignment or wobble in the rotating assembly
Engineering Tips
  • Implement precision laser alignment during installation and periodic re-alignment checks to minimize dynamic imbalance
  • Establish condition-based lubrication program using vibration analysis to optimize greasing intervals and detect early bearing degradation

Compliance & Manufacturing Standards

Reference Standards
ISO 1940-1:2003 - Balance quality requirements for rotors in a constant (rigid) state ANSI/AGMA 2000-A88 - Gear Classification and Inspection Handbook DIN 3960 - Tolerances for cylindrical gear teeth
Manufacturing Precision
  • Bore diameter: ±0.02 mm
  • Eccentricity: ±0.05 mm
Quality Inspection
  • Dimensional verification using CMM (Coordinate Measuring Machine)
  • Dynamic balancing test per ISO 1940-1

Factories Producing Eccentric Weight Assembly

Verified manufacturers with capability to produce this product in China

✓ 96% Supplier Capability Match Found

S Sourcing Manager from Australia Jan 16, 2026
★★★★★
"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Eccentric Weight Assembly arrived with full certification."
Technical Specifications Verified
P Procurement Specialist from Singapore Jan 13, 2026
★★★★☆
"Great transparency on the Eccentric Weight Assembly components. Essential for our Machinery and Equipment Manufacturing supply chain. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from Germany Jan 10, 2026
★★★★★
"The Eccentric Weight Assembly we sourced perfectly fits our Machinery and Equipment Manufacturing production line requirements."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

7 sourcing managers are analyzing this specification now. Last inquiry for Eccentric Weight Assembly from India (54m ago).

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Frequently Asked Questions

What is the primary function of an eccentric weight assembly in compaction equipment?

The eccentric weight assembly creates controlled vibration through centrifugal force when rotated, which helps compact materials like soil, asphalt, or concrete in construction and industrial applications.

Why is high-strength alloy steel used for eccentric weight assemblies?

High-strength alloy steel provides exceptional durability, wear resistance, and fatigue strength to withstand continuous rotational forces and harsh operating conditions in heavy machinery.

What maintenance is required for eccentric weight assemblies in vibration equipment?

Regular inspection for wear, proper lubrication of bearings and shafts, and checking torque on fasteners are essential. Replace components showing significant wear to prevent equipment failure.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

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