Neodymium Magnets (NdFeB) Manufacturer

Neodymium magnets—also known as NdFeB or rare-earth magnets—provide the highest magnetic strength among commonly used permanent magnet materials. They are widely used in motors, sensors, automation, consumer electronics, medical devices, and magnetic assemblies.

We support custom NdFeB parts from material selection to precision machining, coating, magnetization, and inspection—prototype to volume production.

Grades: Nxx / NxxM / NxxH / NxxSH / NxxUH Coatings: Ni-Cu-Ni / Zn / Epoxy / others Magnetization: axial / diametral / radial / multipole QC: flux, pull force, dimensions, coating tests
To quote fast, please provide:
  • Drawing (STEP/DWG/PDF) + tolerance
  • Working temperature & environment (humidity/salt/fatigue)
  • Target performance (pull force / flux / torque)
  • Magnetization direction & polarity requirement
  • Quantity & delivery schedule
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What Are Neodymium Magnets?

Material NdFeB magnets are sintered permanent magnets based on neodymium, iron, and boron with alloying elements for performance tuning.
Why They’re Popular Highest strength-to-size ratio, enabling compact designs and high power density in modern devices.
Key Considerations Temperature limits, corrosion protection (coating), and safe handling due to strong magnetic force.

Common NdFeB Magnet Shapes & Products

Disc Magnets

Compact holding, sensors, fixtures, consumer products.

Block Magnets

Assemblies, automation, clamps, industrial devices.

Ring Magnets

Motors, couplings, actuators, magnetic circuits.

Arc / Segment Magnets

Motor rotors and high-efficiency drive systems.

Countersunk Magnets

Easy mounting in holders, fixtures and housings.

Custom Machined Parts

Precision tolerances, special geometries, optimized designs.

Magnetic Assemblies

Steel cups, yokes, injection molding, adhesive assemblies.

Multipole Magnetization

Sensor rings, encoders, special field patterns.

Typical Applications

Motors & Automationrotors, stators, servos, robotics, magnetic couplings
Sensors & Electronicsencoders, latches, speakers, precision positioning
Magnetic Assembliesholders, fixtures, tools, magnetic modules

Grade & Temperature Selection Guide

NdFeB grades are typically expressed as Nxx and temperature series such as M/H/SH/UH. The right grade depends on your operating temperature, demagnetization risk, and magnetic circuit design.

Series Typical Use Typical Temperature Need Notes
Nxx General applications with moderate temperature Room temp to moderate ranges* Cost-effective; confirm demag risk with circuit design
NxxM Better temp stability than standard grades Moderate temperature* Often used for improved reliability
NxxH Motors and demanding environments Higher operating temperature* Improved coercivity; common for motor applications
NxxSH / UH High temperature and high demag resistance need High temperature* Best for high-temp and strong opposing fields
Custom Special performance or application constraints By evaluation Share target specs and working conditions for recommendation

*Temperature capability varies by exact grade, geometry, coating, and circuit design. Final recommendation should be confirmed with drawings and conditions.

Coating & Surface Protection Options

Ni-Cu-Ni

Common bright finish, good general protection for many indoor applications.

Zinc (Zn)

Cost-effective; suitable for moderate corrosion environments.

Epoxy

Improved corrosion resistance; available in various colors and thickness options.

Custom Coatings

Available based on environment needs (humidity/salt spray/chemicals).

Tip: Choose coating based on environment. For humid or corrosive conditions, consider epoxy or enhanced protection.

Magnetization, Polarity & Tolerances

Magnetization Options Axial, diametral, radial, and multipole magnetization (depending on geometry and fixture feasibility).
Polarity Control Marking, pairing/matching sets, and polarity verification for stable assembly behavior.
Tolerances Standard tolerances depend on shape and size; grinding available for critical dimensions.

Manufacturing & Quality Control

Process Control Material selection, machining route planning, coating control, magnetization fixture control.
Inspection Flux checks, pull force testing, dimensional inspection, coating thickness & adhesion (on request).
Documentation Inspection reports, traceability, and packaging specifications available for B2B requirements.

FAQ

Are neodymium magnets the strongest permanent magnets?
NdFeB magnets typically offer the highest magnetic strength among widely used permanent magnet materials, enabling compact designs with high power density.
Do neodymium magnets need coating?
In many cases yes. NdFeB can be susceptible to corrosion, so coatings like Ni-Cu-Ni, Zn, or epoxy help improve durability depending on the environment.
How do I choose the right grade for temperature?
Choose based on operating temperature and demagnetization risk. H/SH/UH series provide better coercivity for higher temperature or stronger opposing fields. Share your circuit and conditions for an optimized recommendation.
Can you do custom magnetization or multipole patterns?
Yes. Axial, diametral, radial, and multipole magnetization are supported depending on geometry and fixture feasibility. We can also support polarity marking and matching sets.
Send drawing + conditions → get grade recommendation + quotation

Preferred files: STEP / DWG / PDF. No drawing? Send photos + dimensions + target performance.

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