Neodymium Magnet FAQ
General Questions About Neodymium Magnets
1. What is a Neodymium Magnet?
Neodymium magnets, also called NdFeB magnets, are the strongest type of permanent magnet available today. They are made from an alloy of neodymium, iron, and boron, and are widely used in motors, electronics, sensors, and industrial equipment.
2. Why are neodymium magnets so strong?
Neodymium magnets have an extremely high magnetic energy product (BHmax), which allows them to generate strong magnetic fields in a small size. This makes them ideal for high-performance applications.
3. What are the most common magnet grades?
Higher grades generally provide stronger magnetic performance.
4. What is the difference between N35 and N52 magnets?
The difference is the maximum magnetic energy.
N52 magnets produce a stronger magnetic field than N35 magnets, but may also have lower temperature resistance.
5. What temperature can neodymium magnets withstand?
Standard magnets usually operate up to 80°C.
High-temperature grades can operate at higher temperatures:
M grade: 100°C
H grade: 120°C
SH grade: 150°C
UH grade: 180°C
EH grade: 200°C
Custom Magnet Manufacturing
6. Can you manufacture custom magnets?
Yes. We specialize in custom sintered neodymium magnets manufactured according to customer drawings, samples, or technical specifications.
7. What shapes of magnets can you produce?
We produce many magnet shapes including:
Disc magnets
Block magnets
Ring magnets
Arc magnets
Countersunk magnets
Segment magnets
Irregular custom magnets
8. What information is required for a custom magnet quote?
To quote accurately, please provide:
Magnet dimensions
Magnet grade
Magnetization direction
Coating requirement
Quantity
Application (optional)
Technical drawings are highly recommended.
9. Can you assist with magnet design?
Yes. Our engineering team can help customers optimize magnet size, grade, and magnetization direction based on application requirements.
10. Do you provide OEM services?
Yes. We support OEM services including:
Private labeling
Custom packaging
Magnet assemblies
Product branding
Magnet Performance & Testing
11. What magnetic properties are tested?
We test several magnetic parameters including:
Remanence (Br)
Coercivity (Hcb)
Intrinsic coercivity (Hcj)
Maximum energy product (BHmax)
12. How do you measure magnetic strength?
Magnetic properties are measured using specialized instruments such as hysteresis graph testers and flux meters.
13. What is remanence (Br)?
Remanence is the magnetic flux density remaining in a magnet after magnetization. It represents how strong the magnet's magnetic field is.
14. What is coercivity?
Coercivity measures the magnet's ability to resist demagnetization.
Magnets with higher coercivity perform better in high-temperature or harsh environments.
15. Do magnets lose strength over time?
High-quality neodymium magnets lose less than 1% of their magnetic strength over many years, provided they operate within their recommended temperature limits.
Surface Coating & Corrosion Protection
16. Why do neodymium magnets need coating?
NdFeB magnets contain iron and can corrode in humid environments. Protective coatings prevent oxidation and extend service life.
17. What coatings are available?
Common coatings include:
Nickel (Ni-Cu-Ni)
Zinc (Zn)
Epoxy coating
Gold plating
Phosphate coating
18. Which coating provides the best corrosion resistance?
Epoxy coating and multilayer nickel coatings usually provide better corrosion protection for humid or harsh environments.
Production & Supply
19. What is your production capacity?
Our factory has stable production capacity to support both small batch orders and large-scale mass production.
20. What is your minimum order quantity?
MOQ depends on magnet size and production complexity. Small sample orders are available for testing.
21. What is the typical production lead time?
Sample orders: 5–10 days
Standard orders: 10–20 days
Custom magnets: 15–30 days
22. Can you provide magnet samples?
Yes, samples can be provided for evaluation and testing.
23. Do you keep magnets in stock?
Some standard sizes are available in stock. Please contact us to check availability.
Shipping & Logistics
24. Do you ship magnets worldwide?
Yes. We export magnets to customers around the world including Europe, North America, Asia, and the Middle East.
25. What shipping methods do you offer?
Shipping options include:
DHL / FedEx / UPS express
Air freight
Sea freight
Rail transport
26. Can magnets be shipped by air?
Yes, but magnets must be properly shielded to meet airline regulations.
27. How are magnets packaged for shipping?
We use:
Magnetic shielding materials
Protective foam packaging
Strong export cartons
Pallet packaging for large shipments
Applications
28. What industries use neodymium magnets?
NdFeB magnets are widely used in:
Electric motors
Electro-acoustic devices
Sensors
Automotive systems
Medical equipment
Industrial automation
29. Are neodymium magnets used in electric vehicles?
Yes. NdFeB magnets are critical components in EV motors and high-efficiency drive systems.
30. Are neodymium magnets safe?
Neodymium magnets are safe when used correctly, but due to their strong magnetic force they should be handled carefully to avoid injury or damage.
Need More Information?
If you have additional questions about neodymium magnets, customization, or magnet applications, please contact our team.
We are happy to assist with your project.
Still Have Questions?
Send us your drawing or magnet requirements and our engineers will provide professional recommendations.