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Magnet Type: ustom magnet,Irregular Shaped magnet
Material Grade: 35~N52(all series for choice)
Working Temperature: 0~220°C
Surface Treatment: ikel,Zinc,Epoxy,Gold...
Magnetization Direction: xial,Diametral,Multi-poles etc.
Custom-Made Sintered Neodymium Magnet
UNMAG understand that some projects and patented applications often require a unique size or shape.
We can manufacture Sintered NdFeB magnets to your exact specifications in just a few weeks in prototype or
production quantities,
Advice from our team of expert technicians is available as they are always on hand to help and will always
operate confidentially.Whatever the application, a dedicated member of our technical team will
discuss your requirements with you in full with a view to understanding your application inside and out
before we proceed to manufacture the product to your desired specifications.
There are some things to consider before designing a custom-made NdFeB magnet:
1.Which material do you require the magnet to be made from?
We can manufacture bespoke sizes in all grades of neodymium, samarium cobalt, ferrite, alnico and flexible material.
2.What size do you require?
To be able to provide a quotation we would need to know the exact dimensions as a minimum,
preferably supplied on a technical drawing.
3.Where will the poles be positioned?
We can produce magnets and assemblies with axial, diametric, radial or multi-pole magnetisation.
4.Will the magnet require a protective coating?
We can offer a wide range of coatings to meet almost any demand.
5.How many units do you require?
It is more cost-effective to produce magnets in larger quantities; however, it is possible to produce
most options in small batches
6.What's lead time you need?
According to your quantity and urgent requirement of delivery time,We will adjust production scheduel to meet your
delivery time.
| Parameter Name | Parameter Values | Unit |
| Curie Temperature | 310～380 | ℃ |
| Relative Recoil Permeability | 1.02～1.05 | |
| Reversible Temperature Coefficient of Br (20~100℃) | -0.09～-0.13 | %/℃ |
| Reversible Temperature Coefficient of Hcj (20~100℃) | -0.4～-0.7 | %/℃ |
| Density | 7.50～7.70 | g/cm3 |
| Vickers Hardness | 550～700 | |
| Bending Strength | -0.09～-0.13 | MPa |
| Tensile Strength | ≥80 | MPa |
| Compressive Strength | 800 ~1050 | MPa |
| Electric Resistivity | 150 | μΩ·cm |
| Thermal Conductivity | 8～10 | W/(M·℃) |
| Coefficient of Thermal Expansion （Parallel to the orientation） | 5 | 10-6/K |
| Coefficient of Thermal Expansion （vertical to the orientation） | -1.5 | 10-6/K |
| Young's Modulus | 150～200 | GPa |
| Specific Heat（20℃～320℃） | 3.0～4.6 | J/(g·k) |
| weight loss（low weight loss products） | ≤2 | mg/cm2 |
| Mixing | 1.Mix the ingredients. |
| Melting | 2.Dissolve the mixture at high temperature and prepare an alloy. |
| Fine pulverization | 3.Turn the alloy into fine powder. |
| Molding in a magnetic field | 4.When pressing the fine powder, apply a magnetic field to it and prepare a molded product of powder with aligned directions of magnetization. |
| Sintering and heat treatment | 5.Sinter the product at about 1,100℃, and then subject it to heat treatment at about 600℃ to increase its magnetic characteristics. |
| Processing | 6.Process the manufactured magnet base material and finish it into the product shape. |
| Surface treatment | 7.Subject the product to surface treatment in order to make it rustproof. |
| Magnetization | 8.Apply a magnetic field to give the magnet magnetism. |
To produce according to your exact specifications,your special application.
Regarding of magnetic properties of Sintered NdFeB Magnet, Please click here.
For your different application,different grade/series for your choice.For application in normal life,N series is enough.
Different Series correspond to different working temperature.
| Grade | Max Operating Temperatures | |
| Series | Grade Range | |
| N Series | N35-N52 | 80°C |
| M Series | 35M-52M | 100°C |
| H Series | 33H-48H | 120°C |
| SH Series | 30SH-48SH | 150°C |
| UH Series | 30UH-42UH | 180°C |
| EH Series | 30EH-38EH | 200°C |
| AH Series | 30AH-35AH | 220°C |
Physical Properties & Application to Environment of the Coating
Coating Material | Colour | Properties | Environment of Application | Thickness of |
Zinc | Blue, Black and rainbow etc | Compact, Stable and Homogeneous | With reasonalbe capability of anticorrosion | 6um≤∮≤12 |
Nickel-Copper-Nickel | White and black | Light and Stable | Suitable for higher corrosive environment | 15μm≤∮≤30pm |
Phosphorization | Colorless or light gray | uniform thickness | short-term anticorrosion | - |
Epoxy | Black and Gray | layer with certain luster, insurability | Suitable for higher corrosive environment | ≥15μm |
Parylene | transparency | uniform thickness, density pinholes-free and insurability | Excellent capability of anticorrosion especially for small items | 0.1μm≤∮≤100pm |
Ni+Cu+Epoxy | Black | Layer with certain luster | Excellent capability of | 10-30μm |
anticorrosion. Suitable for | ||||
hostile environment | ||||
salt spray resistance>300hr | ||||
Al+Epoxy | Black | Layer with certain luster | Excellent capability of | 15-35μm |
anticorrosion. Suitable for | ||||
hostile environment | ||||
salt spray resistance>650hr Widely used in new energy | ||||
auto magnets |
| For more details,welcome to contact with our sales engineers. | |||
online service
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