Industry-Verified Manufacturing Data (2026)

Rotor with Eccentric Weight

Based on aggregated insights from multiple verified 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
    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
    The deliberately off-center mass that creates the rotational imbalance necessary for vibration generation.
    Material: High-Density Alloy (e.g., Tungsten, Brass)
  • Shaft
    Central axis for rotation, transmits torque from the magnetic field and is supported by bearings.
    Material: Hardened Steel
Engineering Reasoning
100-6000 RPM with centrifugal force 5-1800 N at 0.02-0.15 m eccentricity
Material yield strength exceeded at 650 MPa for steel alloys or 250 MPa for aluminum alloys
Design Rationale: Fatigue failure from cyclic stress exceeding endurance limit due to alternating centrifugal forces during rotation
Risk Mitigation (FMEA)
Trigger Bearing wear increasing radial clearance beyond 0.1 mm
Mode: Excessive vibration amplitude exceeding 2.5 mm/s RMS
Strategy: Precision angular contact bearings with C3 clearance and automated lubrication system
Trigger Corrosion reducing cross-sectional area by 15% in saltwater environments
Mode: Catastrophic fracture at stress concentration points
Strategy: 316L stainless steel construction with 25 μm electroless nickel plating

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 DNA

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

Verified manufacturers with capability to produce this product in China

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✓ 98% Supplier Capability Match Found

T Technical Director from Singapore Feb 12, 2026
★★★★★
"The Rotor with Eccentric Weight we sourced perfectly fits our Electrical Equipment Manufacturing production line requirements."
Technical Specifications Verified
P Project Engineer from Germany Feb 09, 2026
★★★★☆
"Found 48+ suppliers for Rotor with Eccentric Weight on CNFX, but this spec remains the most cost-effective. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
S Sourcing Manager from Brazil Feb 06, 2026
★★★★★
"The technical documentation for this Rotor with Eccentric Weight is very thorough, especially regarding technical reliability."
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.”

12 sourcing managers are analyzing this specification now. Last inquiry for Rotor with Eccentric Weight from Thailand (23m ago).

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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 Specifications verified by CNFX Industrial Index (v2.6.03) for Electrical Equipment Manufacturing sector.

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