Magnet Knowledge

What is a Neodymium Magnet, a Detailed Explanation Guide

Zhaobao Magnet

What Is Neodymium Magnet (NdFeB)?

Neodymium magnets (also known as "NdFeB", "Neo" or "Nd" magnets) are permanent magnets mainly made of neodymium, iron & boron. They are from the Rare-Earth magnet family and have the highest magnetic properties of all permanent magnets, stronger than Samarium Cobalt (SmCo), AlNiCo, and Ferrite. In addition to their high magnetic strength, they are relatively inexpensive, making them an ideal choice for a wide range of consumer, commercial, industrial, and technical applications.

Neodymium magnets (NdFeB) offer maximum performance from the smallest magnet volume. They should always be coated to guard against the risk of corrosion – NiCuNi, Zinc, NiCuEpoxy, and Gold are popular finishes. Grade of 55 NdFeB magnets is commonly in use. They are used in nearly all Industries: Automotive, Aerospace, Wind Turbine, Military, White Goods, Lighting, Food Preparation, Separation, Motor, and Generator Industries are just a few examples of Industries.


Advantages of Neodymium Magnets

Best power to weight ratio of all magnets

High resistance to demagnetization

Often the most cost-effective choice


Disadvantages of Neodymium Magnets

In humid conditions, magnets without a surface coating (such as plating) may rust. Therefore, all Neodymium Magnets or Rare Earth magnets should have some form of protective coating to minimize and ideally prevent corrosion. Uncoated is not advised. The default / standard protective coating is Ni−Cu−Ni plating. Other coatings/finishes exist (over 10 finishes are currently available, please view our website). Where maximum corrosion resistance is required for NdFeB, consider using the increased corrosion resistance range of NdFeB alloys.


Grades of NdFeB Magnets

Our products are covered the full range of N30~N52, N30M~N52M, N30H~N52H, N30SH~N48SH, N28UH~N50UH, N28EH~N48EH, N28AH~N45AH. Our main characteristic is that we do not produce standard products only, but special-made magnets to meet customers' demand. Magnet users can get the best cost-effective NdFeB magnets with special formula and technology.

Grade BR HC Hcj (BH)MAX
N35 11.7-12.1 KGs >11.0 KOe >12 KOe 33-35 MGOe
N38 12.2-12.6 KGs >11.0 KOe >12 KOe 36-38 MGOe
N40 12.6-12.9 KGs >11.0 KOe . >12 KOe 38-40 MGOe
N42 13.0-13.2 KGs >11.0 KOe >12 KOe 40-42 MGOe
N45 13.3-13.7 KGs >11.0 KOe >12 KOe 43-45 MGOe
N48 13.8-14.2 KGs >11.0 KOe >12 KOe 45-48 MGOe
N50 14.1-14.5 KGs >11.0 KOe >11 KOe 48-50 MGOe
N52 14.5-14.8 KGs >11.2 KOe >11 KOe 49.5-52 MGOe

Click to see more magnetic properties of neodymium magnets

As a leading manufacturer of Neodymium iron Boron(NdFeB) for PM motors and generators, the ZHAOBAO MAGNET team customizes special formulas and special production processes to provide customers with the most cost-effective magnets. The form below shows some of the motor magnet's performance.


How to Produce NdFeB Magnet

There are two principal neodymium magnet manufacturing methods:

Classical powder metallurgy or sintered magnet process

Sintered Nd-magnets are prepared by the raw materials being melted in a furnace, cast into a mold, and cooled to form ingots. The ingots are pulverized and milled; the powder is then sintered into dense blocks. The blocks are then heat-treated, cut to shape, surface treated, and magnetized.

Rapid solidification or bonded magnet process

Bonded Nd-magnets are prepared by melt spinning a thin ribbon of the NdFeB alloy. The ribbon contains randomly oriented Nd2Fe14B nano-scale grains. This ribbon is then pulverized into particles, mixed with a polymer, and either compression- or injection-molded into bonded magnets.

We have an annual production capacity of 5,000 tons for rare earth permanent magnets. With the “Long-term & Win-win” cooperation principle, we are very enthusiastic for new customers and new projects to provide with even one piece of sample. Production time for samples can be 7 to 10 days, and for bulk orders can be 15 days.


Applications of NdFeB Magnets

ZHAOBAO's magnets are widely used in computer, automobile, instruments &meters, electronics, household electrical appliances, petrochemical, medical care, aerospace and other industries. 

Our main market is in Industrial Automation, Automotive Industry, Clean Energy, and other high-end applications, especially in energy-efficient PM motors and generators, such as Elevator Motor (Traction Motor), Servo Motor, Wind Power Generator, Electric Vehicle Drive Motor, Explosion-proof Motor, Compressor Motor, High-Speed Motor, etc.


Where to Buy Neodymium Magnets

At ZHAOBAO MAGNET, we apply outstanding quality, advanced manufacturing, and great service to help our customers succeed. Our reputation as a magnet manufacturer stands second to none.

We ensure quality and long-term reliability with a vertically integrated approach. We help solve design challenges and identify the best materials for your target application. Our expert capabilities enable us to meet your needs with our involvement in designing, machining, assembling, and testing your products.

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Other Shape Neodymium Magnets

Do you want high quality neodymium magnets? Click the button to get in touch with us.

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China Permanent Magnet, Magnetic Material Manufacturer - Zhaobao
Company: Ningbo Zhaobao Magnet Co., Ltd.
Add: No.355 Datong Road Zhenhai Ningbo, 315200, China
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