Structured Manufacturing Data (2026)

Permanent Magnet Assembly

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Permanent Magnet 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 Permanent Magnet Assembly is characterized by the integration of Permanent Magnet Blocks and Magnetic Yoke/Frame. In industrial production environments, manufacturers listed on CNFX commonly emphasize Neodymium Iron Boron (NdFeB) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A magnetic field generation component within electromagnetic vibration testing equipment

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Product Specifications

Technical details and manufacturing context for Permanent Magnet Assembly

Definition
A permanent magnet assembly is a critical component of Industrial Electromagnetic Vibration Testing Systems that provides a stable, constant magnetic field without requiring external power. It works in conjunction with electromagnetic coils to generate controlled vibration forces for testing materials, components, and assemblies under simulated operational conditions.
Working Principle
The permanent magnet assembly creates a fixed magnetic field that interacts with alternating currents in adjacent electromagnetic coils. This interaction produces Lorentz forces that generate precise, controllable vibrations. The permanent magnets maintain a constant magnetic flux density, ensuring consistent force generation and system stability during testing operations.
Common Materials
Neodymium Iron Boron (NdFeB), Samarium Cobalt (SmCo), Alnico, Ferrite
Technical Parameters
  • Overall dimensions including length, width, and height of the magnet assembly (mm) Per Request
Components / BOM
  • Permanent Magnet Blocks Part
    Generate the primary magnetic field through their inherent magnetic properties
    Material: Rare-earth magnets (NdFeB/SmCo) or ceramic magnets
  • Magnetic Yoke/Frame Part
    Provides structural support and directs magnetic flux efficiently
    Material: Low-carbon steel or soft magnetic composites
  • Pole Pieces Part
    Shape and concentrate the magnetic field in the air gap
    Material: High-permeability steel or specialized alloys
  • Mounting Hardware Part
    Secures the magnet assembly within the vibration testing system
    Material: Stainless steel or non-magnetic alloys

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Permanent Magnet Assembly.

permanent magnet assembly for vibration testing NdFeB magnet assembly machinery electromagnetic testing equipment magnets industrial permanent magnet blocks magnetic yoke assembly manufacturing

Applied To / Applications

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

Optical Isolators
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Voice Coil Motor (VCM) Actuator
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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 absolute (vacuum/overpressure limited by housing)
other spec: Max magnetic field decay: <0.5% per decade, Vibration tolerance: Up to 100 g RMS, Humidity: 0-95% non-condensing
temperature: -40°C to +150°C (operating), up to +180°C (peak)
Media Compatibility
✓ Dry air/nitrogen environments ✓ Non-conductive cooling fluids (e.g., dielectric oil) ✓ Clean vacuum conditions
Unsuitable: Corrosive/conductive fluids (e.g., saltwater, acids) or ferromagnetic particle-laden environments
Sizing Data Required
  • Required magnetic field strength (Tesla or Gauss)
  • Gap/clearance dimensions for test specimen
  • Dynamic force/displacement requirements of vibration test

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Demagnetization
Cause: Exposure to temperatures above the magnet's Curie point, strong opposing magnetic fields, or mechanical shock/vibration causing domain misalignment.
Corrosion and physical degradation
Cause: Lack of proper protective coating (e.g., nickel, epoxy) in harsh environments (moisture, chemicals), leading to oxidation, pitting, or coating delamination that weakens magnetic properties and structural integrity.
Maintenance Indicators
  • Visible corrosion, cracks, or coating damage on the magnet surface
  • Audible rattling or abnormal vibration indicating loose magnet segments or detachment from the assembly
Engineering Tips
  • Implement strict temperature monitoring and control to keep the assembly below the magnet's maximum operating temperature, and avoid exposure to strong external magnetic fields during handling or operation.
  • Apply and regularly inspect robust protective coatings suitable for the operating environment, and ensure proper mechanical mounting (e.g., using non-magnetic fasteners, adhesive bonding) to minimize stress and vibration.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality management systems ASTM A977/A977M - Standard Specification for Permanent Magnet Assemblies IEC 60404-8-1 - Magnetic materials - Part 8-1: Specifications for individual materials - Magnetically hard materials
Manufacturing Precision
  • Bore diameter: +/-0.02mm
  • Flatness: 0.1mm per 100mm
Quality Inspection
  • Magnetic flux density measurement (Gauss meter test)
  • Dimensional verification with coordinate measuring machine (CMM)

Factories Producing Permanent Magnet Assembly

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 materials are used in permanent magnet assemblies for vibration testing equipment?

Our assemblies use premium magnetic materials including Neodymium Iron Boron (NdFeB), Samarium Cobalt (SmCo), Alnico, and Ferrite, selected based on specific temperature, strength, and corrosion resistance requirements.

What components are included in a permanent magnet assembly BOM?

The bill of materials includes Magnetic Yoke/Frame for structural support, Mounting Hardware for secure installation, Permanent Magnet Blocks as the core magnetic elements, and Pole Pieces to shape and direct the magnetic field.

How do permanent magnet assemblies function in electromagnetic vibration testing equipment?

These assemblies generate stable, consistent magnetic fields that interact with electromagnetic coils to produce controlled vibrations, enabling precise testing of materials, components, and systems for durability and performance validation.

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 Machinery and 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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