Structured Manufacturing Data (2026)

Rotor with Eccentric Weight

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Rotor with Eccentric Weight used in the Electrical Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Rotor with Eccentric Weight is characterized by the integration of Rotor Core and Eccentric Weight. In industrial production environments, manufacturers listed on CNFX commonly emphasize Electrical Steel (Silicon Steel) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A rotating component with an off-center mass that generates centrifugal force to produce vibration.

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Product Specifications

Technical details and manufacturing context for Rotor with Eccentric Weight

Definition
The rotor with eccentric weight is the core moving part within a vibration motor. It consists of a shaft-mounted rotor with a deliberately unbalanced mass distribution. When rotated by the motor's electromagnetic field, the off-center weight creates a centrifugal force that causes the entire motor assembly to vibrate. This component directly converts rotational motion into vibrational energy.
Working Principle
The rotor is mounted on the motor shaft. When electrical power is applied, the motor's stator creates a rotating magnetic field that drives the rotor. Due to the eccentric (off-center) mass attached to or integrated into the rotor, the center of mass does not align with the axis of rotation. As the rotor spins, this imbalance generates a centrifugal force that changes direction continuously, resulting in a periodic shaking or vibrating motion of the motor housing.
Common Materials
Electrical Steel (Silicon Steel), High-Density Tungsten Alloy (for the weight)
Technical Parameters
  • Eccentric Moment (Unbalance). The product of the eccentric mass and its distance from the rotation axis. This is the primary parameter determining vibration amplitude. (g·mm) Customizable
Components / BOM
  • Rotor Core Part
    Provides the magnetic circuit and structural base for the assembly. Typically made from laminated electrical steel to reduce eddy current losses.
    Material: Electrical Steel (Silicon Steel Laminations)
  • Eccentric Weight Part
    The deliberately off-center mass that creates the rotational imbalance necessary for vibration generation.
    Material: High-Density Alloy (e.g., Tungsten, Brass)
  • Shaft Part
    Central axis for rotation, transmits torque from the magnetic field and is supported by bearings.
    Material: Hardened Steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Rotor with Eccentric Weight.

eccentric weight rotor for vibration motors electrical steel rotor with tungsten weight industrial vibration generator rotor centrifugal force rotor for electrical equipment high-density tungsten alloy eccentric rotor

Applied To / Applications

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

Vibration Motor
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Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 2 bar
other spec: Max rotational speed: 3000 RPM, Vibration frequency range: 10-100 Hz
temperature: -20°C to +120°C
Media Compatibility
✓ Air/gas streams ✓ Dry bulk materials ✓ Non-corrosive liquids
Unsuitable: Highly corrosive chemical environments
Sizing Data Required
  • Required centrifugal force (N)
  • Operating frequency (Hz)
  • Available installation space (mm)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Bearing fatigue and seizure
Cause: Excessive unbalanced forces from eccentric weight causing cyclic loading beyond bearing design limits, leading to premature fatigue failure or overheating and seizure.
Shaft deflection and cracking
Cause: Continuous high-amplitude vibration due to eccentric mass imbalance, resulting in cyclic stress concentrations at shaft shoulders or keyways, eventually causing fatigue cracks or permanent bending.
Maintenance Indicators
  • Audible knocking or grinding sounds during operation, indicating bearing wear or contact between rotating and stationary parts.
  • Visible excessive vibration or wobble observed at rotor ends or mounting points, often accompanied by increased noise levels.
Engineering Tips
  • Implement strict dynamic balancing procedures during installation and after any maintenance, using precision balancing equipment to minimize residual unbalance forces.
  • Establish regular vibration monitoring with trend analysis to detect early imbalance changes, and schedule preventive maintenance based on vibration severity thresholds rather than fixed time intervals.

Compliance & Manufacturing Standards

Reference Standards
ISO 1940-1:2003 - Mechanical vibration - Balance quality requirements for rotors in a constant (rigid) state ANSI/ASA S2.19-1999 (R2020) - Mechanical vibration - Balance quality requirements of rigid rotors DIN ISO 1940-1:2004 - Mechanical vibration - Balance quality requirements for rotors in a constant (rigid) state
Manufacturing Precision
  • Eccentric weight position: +/-0.5° angular tolerance
  • Bore diameter: +/-0.01mm for interference fits
Quality Inspection
  • Dynamic balancing test to ISO 1940-1 Grade G2.5 or better
  • Hardness testing (Rockwell C) of eccentric weight material

Factories Producing Rotor with Eccentric Weight

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the purpose of the eccentric weight in this rotor?

The eccentric weight creates an off-center mass that generates centrifugal force during rotation, producing controlled vibration for applications like vibrating motors, feeders, or compactors in electrical equipment.

Why is tungsten alloy used for the weight component?

Tungsten alloy provides high density in a compact size, allowing for maximum centrifugal force generation with minimal weight size. This improves efficiency and vibration intensity while maintaining structural integrity.

What are the main applications for this rotor in electrical manufacturing?

This rotor is used in vibration motors for material handling equipment, compactors, feeders, sorting systems, and any electrical device requiring controlled mechanical vibration for operation or material movement.

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.

Data basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Electrical Equipment Manufacturing.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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