Structured Manufacturing Data (2026)

Drive magnet assembly

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Drive 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 Drive magnet assembly is characterized by the integration of Magnet segments and Rotor back iron. 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.

The magnetic component within a magnetic coupling that transmits torque from the drive side to the driven side through magnetic fields.

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Product Specifications

Technical details and manufacturing context for Drive magnet assembly

Definition
A drive magnet assembly is the active magnetic component in a magnetic coupling system, consisting of permanent magnets arranged in a specific pattern on a rotor or housing. It creates a magnetic field that interacts with a corresponding driven magnet assembly to transmit rotational force without physical contact, enabling torque transfer while maintaining isolation between drive and driven shafts.
Working Principle
The drive magnet assembly rotates with the input shaft, generating a rotating magnetic field. This magnetic field induces magnetic forces on the driven magnet assembly, causing it to rotate synchronously without mechanical connection. The torque transmission occurs through magnetic attraction and repulsion between the permanent magnets arranged in alternating polarity patterns.
Common Materials
Neodymium Iron Boron (NdFeB), Samarium Cobalt (SmCo), Alnico
Technical Parameters
  • Outer diameter of the magnet assembly (mm) Per Request
Components / BOM
  • Magnet segments Part
    Generate magnetic field for torque transmission
    Material: Rare earth permanent magnets
  • Rotor back iron Part
    Provide structural support and magnetic flux path
    Material: Electrical steel or soft magnetic composite
  • Mounting hub Part
    Connect assembly to drive shaft
    Material: Stainless steel or aluminum alloy
  • Retaining ring Part
    Secure magnet segments in position
    Material: Non-magnetic stainless steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Drive magnet assembly.

high torque drive magnet assembly magnetic coupling magnet segments NdFeB magnet assembly for machinery industrial drive magnet mounting hub custom magnetic rotor back iron

Applied To / Applications

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

Magnetic Coupling
View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 100 bar (standard), up to 300 bar with reinforced housing
other spec: Max torque transmission: 500 Nm (standard), up to 2000 Nm with custom designs; Gap tolerance: ±0.5 mm; Slurry concentration: ≤40% solids by weight
temperature: -40°C to 150°C (standard), up to 250°C with high-temp magnets
Media Compatibility
✓ Clean water and aqueous solutions ✓ Hydrocarbons and oils ✓ Food-grade and pharmaceutical fluids
Unsuitable: Highly corrosive media (e.g., concentrated acids, strong oxidizers)
Sizing Data Required
  • Required torque (Nm) at operating speed
  • Operating gap between drive and driven magnets (mm)
  • Housing material compatibility with process media

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Magnetic field degradation
Cause: Thermal demagnetization from excessive operating temperatures or exposure to high ambient heat, reducing magnetic flux density and assembly efficiency.
Mechanical loosening or misalignment
Cause: Vibration-induced fatigue from unbalanced rotating components or resonance, leading to fastener failure, positional drift, and potential contact with adjacent parts.
Maintenance Indicators
  • Audible high-frequency whining or grinding noise during operation, indicating misalignment, bearing wear, or contact between magnet and housing.
  • Visible accumulation of metallic dust or debris around the assembly housing, suggesting wear particles from internal abrasion or corrosion.
Engineering Tips
  • Implement periodic infrared thermography inspections to monitor operating temperatures and prevent thermal demagnetization; maintain ambient and operational temperatures within the magnet's Curie point specification.
  • Use vibration analysis and laser alignment tools during installation and routine checks to ensure precise alignment and balance, reducing mechanical stress and preventing loosening from resonant frequencies.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 Quality Management Systems ASTM A977/A977M-07(2017) Standard Test Method for Magnetic Properties of High-Coercivity Permanent Magnet Materials CE Marking (EU Directive 2014/35/EU Low Voltage Directive)
Manufacturing Precision
  • Bore diameter: ±0.01mm
  • Magnet-to-housing concentricity: 0.05mm TIR
Quality Inspection
  • Magnetic flux density measurement (Gauss meter test)
  • Dimensional verification with CMM (Coordinate Measuring Machine)

Factories Producing Drive 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 are the advantages of using a drive magnet assembly in machinery?

Drive magnet assemblies enable contactless torque transmission, reducing mechanical wear, eliminating lubrication needs, and providing hermetic sealing for applications requiring isolation between drive and driven components.

How do I choose between NdFeB, SmCo, and Alnico materials for my application?

NdFeB offers the highest magnetic strength for compact designs, SmCo provides excellent temperature stability and corrosion resistance, while Alnico is preferred for high-temperature applications above 300°C with good thermal stability.

What maintenance is required for drive magnet assemblies?

Drive magnet assemblies require minimal maintenance due to their contactless operation. Regular inspection for physical damage, contamination, and monitoring of temperature during operation is recommended to ensure optimal performance.

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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