N42H ARC Neodymium Magnet for Motor

N42H ARC Neodymium Magnet for Motor

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ARC Neodymium Magnet for Motor

Δ Round Neodymium Rare Earth Disc Magnet Description 

Neodymium arc magnets for permanent motor generator magnets Description

Neodymium arc magnets is a special shape of rare earth magnet, Neodymium segment magnets are also called neodymium arc magnets, it is made by wire cutting of the block magnets. This neodymium arc magnets has a wide range of applications, it is commonly used in applications such as generator magnets motor magnets for permanent motor, both for rotors and stators, Wind turbine. 
It can also be used for personal creative design or for the computer hard disk magnet. If you are interested in the neodymium arc magnets generator magnets motor magnets for permanent motor or other application, you can send inquiry to us, size is customized as client’s requirement. 

This neodymium arc magnet is made of top quality high temperature NdFeB magnetic material under ISO 9002 quality systems.

The material is N42H with working temperature of 120℃ . It is magnetized through the thickness with the north pole on the inner diameter. The 4 pieces of this arc magnets can form a circle with OD=1.5″, ID=1.25″ and height =0.75″.

The following is the magnetic characteristics and the physical characteristics.


Δ Quick Information


Item Arc magnets
Place of origin China
Item ID S1001N
Material NdFeB
Shape Arc
Tolerance ±0.03mm for diamater   /thickness, ±0.1mm for width/ length
Direction of magnetisation axial (parallel to height)
Coating Nickel-plated (Ni-Cu-Ni),can be Customised  Gold, Silver, Copper, Epoxy, Chrome, etc)
Grade Customized  N35 N38 N40 N42 N45 N48 N50 N52 ……
Max. Working Temperature Grade Max. Operating Temperatures
N35-N52 80°C (176°F)
33M- 48M 100°C (212°F)
33H-48H 120°C (248°F)
30SH-45SH 150°C (302°F)
30UH-40UH 180°C (356°F)
28EH-38EH 200°C (392°F)
28AH-35AH 220°C (428°F
  • jintong-parameter


Δ Magnet Detail Picture and Magnetized


arcARC magnet-2

ARC magnet-3

Coating(Surface Treatment)


Metallic Coating (Zn & Ni)

Organic Coating(Black Epoxy)



ΔDisc Magnets Production Flow (Quality Control)  

① Neodymium magnet production processing

Hydrogen explosion+Jet  milling+Sintering+Hypoxia operation process

Sintered NdFeB is the most  widely used rare earth/ permanent magnet material. The metallurgy powder was process  into micro-powder through special Sintering Craft. The production process iludes formula design, cast string, hydrogen explosion,Jet  milling, mixing, molding,Vacuum furnace Sintering , grinding, polishing, surface treatment(coating), packaging . through the( HD+JM+LOP )craft ,the neodymium magnet was feature with  high coercivity and high working temperature.

production flow

②Quality Level: 

Tight production process control:

1.Production process continues to improve

2.Raw material control& fine pick

3.Advanced production equipment

4.Manual picking Sample making Machine inspection


Configure high-end detection equipment

The development of proprietary cutting technology,advanced precision machine tight production process control allowed Jintong to remain at the forefront of neodymium magnet manufacturers.

1.Average force meter ( Milling particle size inspection)

2.Magnetization characteristic automatic measuring instrument  ( Issue demagnetization curve)

3.Magnetic testing equipment for measurements of Field Density and Field Strength

4.Hysteresisgraph for magnetic characteristic measurement.



Jintong magnet Equipment 

Jintong -machine -11

Round Neodymium Magnet Rare Earth Disc Magnets Packing 

We will do the magnetic shielding packaging when deliver magnet by express or by air, it will pass the DGM test. If the magnet is very powerful and total weight is heavy, we will suggest our client to deliver it by sea, it will more economical for them. For small disc magnet, we will use 8nner boxes packing in a carton. There will be a plastic gasket between each magnet if the small magnet is a little difficult to separate. If the magnet is uncoated, we will use the vacuum packing. For big magnet, there will be a Plastic gasket between big magnets, it will protect the big magnet and helpful for client to separate the magnets. ↓ 

Jintong packaging-2 (1)

 ΔHow to order Disc Magnet? 

Our quotation is based on your requests for magnet grade, size, coating, magnetization direction and quantity .

In order to give you our appropriate magnet for your prototype,we still need the other information from you.


Include Diameter and thickness.  

if you can provide your drawings is much better.


Could you kindly tell us the usage of magnet?

We have N35-N52 ,their have different flux and pull force.

we will recommend the right grade for you according your usage.


Does the magnet will attaching the water or exposed in the moist air?

The normal coating is Zn and Ni-Cu-Ni three players coating,

the Ni coating have better anti-corssion and anti-oxidized performance than Zn.

the black Epoxy coating we also can do ,but ask you high MOQ


Axial or Diametrical magnetizing?  

Axially magnetizing is common. 


How many pieces you will need? 

Different requirement correspond to different prices, so we need to check this information with you clearly.  


Why us

1.Scale economy advantage, sharing buyer’s business risk.

Own self-built factory 35,000 square meters, 23 years of professional production experience, huge production capacity.

Good quality and cost advantage.

2.Strong Processing Ability to Meet All Customer Requirements

Jintong is equipped with advanced facilities,variety of production mold,can produce high grade of magnet N48,N52,rich experience on production

3.Strong strategic partnership of rare earths to ensure the quality and price of raw materials

The rare earths in northern China are of good quality, and the powerful Baosteel Group and Zhanjie listed group are one of our partners.

4.Professional Tech Team

Jintong R&D team consists of 3 professor-level senior engineers and 6 professional engineers. At present, it has developed 12 new products, 36 technical transformations and 18 innovative technologies. NdFeB manufacturing technology is in an advanced position in the industry.

5.Value-added Service

We can provide the professional support for our salesman is professionally trained and has the ability to solve professional knowledge.

Familiar with the characteristics of the magnet ,application of magnet, and can respond  timely.

6.Proffesional Package and No Worry about Transportion

Uniform anti-magnetized package whicjh is suitable for various transportation methods;complete .

document(MSDS;ROHS;THS)and rich operatiing experience to ensure smooth transpotation to your door.

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