Strong Round Neodymium Manget N52 Disc Rare Earth Magnets
1. Material: Sintered neodymium magnet
2. Shape: Disc / Round
3. Dimensions: D12x3mm,D10x2mm,D8x3mm or As required / Customized
4. Grade: N35,N38,N40,N42,N45,N48,N50,N52,N55 (N,M,H,SH,UH,EH,AH)
5. Coating: Nickel,Zinc,Epoxy and etc.
6. Magnetized: Axial or Diametrical Magnetized
7. Max working Temp.: 80℃-220℃
8. Tolerance: +/-0.05mm or +/-0.1mm
Sintered NdFeB magnets greatly
expand the applications of permanent magnets.They are widely used in
the fields of transportation,energy,communications,home
appliances,machinery and medical equipment and have become indispensible
function materials in manufacturing and daily life.
Our manufactures
sintered neodymium magnet in custom sizes upon requirements.Our
machining capabilities provide perfect solutions for both regular shapes
and special shapes of NdFeB magnet,with good quality and maintain the
price advantage.
What sizes of disc or round NdFeB magnet are available?
Relying on
experienced production team and strong maching capability,most sizes of
neodymium magnet can be produced with very high quality,and the
tolerance can be controlled within +/-0.05mm or +/-0.1mm.
Please see below available sizes of disc neodymium magnet
| Magnetization Orientation | Diameter | Thickness |
| Axial Mangetized | OD ≦ 240mm | T ≦ 80mm |
| Diametrical Magnetized | OD ≦ 80mm | T ≦ 60mm |
Different grade of sintered neodymium magnet
Basis on different temperature resistrance,the neodymium magnet are divided into N,M,H,SH,UH,EH,AH series,and the corresponding maximum operating temperature is 80℃,100℃,120℃,150℃,180℃,200℃,220℃.
In the same serires,the higher the grade of NdFeB magnet,the more magnetism it is.For example,in N series,N52 grade have more magnetic power than N35 grade,and the N55 grade is the strongest one.
For initial projects,we are happy to provide magnetic technology support and made magnet samples according to your requirements for prototyping or testing needs.
Check the grade/properities of sintered neodymium magnet.
Surface treatment of sintered neodymium magnet
For general use,zinc and nickel plating are most common,and the salt spray test can reach 24 hours to 48 hours.
Epoxy or NiCu+Epoxy Coating have a better corrosion resistance,the salt spray test can reach 72 hours.
| Coating Type | Thickness | Clors | Resistance | ||
| PCT/HAST | SST | Temp.& Humi. | |||
| Zn (White Zn) | ≥5 μm | Bright Blue | —— | ★★ | ★★★ |
| Zn (Color-plated Zn) | ≥5 μm | Shining Color | —— | ★★★ | ★★★★ |
| Ni+Cu+N | ≥15 μm | Silver | ★★★ | ★★★★ | ★★★★★ |
| Ni+Cu+Ni+Cr | ≥15 μm | Silver | ★★★★ | ★★★★ | ★★★★★ |
| Ni+Cu+Ni+Sn | ≥15 μm | Silver | ★★★★ | ★★★★ | ★★★★★ |
| Chemic Ni | ≥5 μm | Silver | ★★★★ | ★★★★★ | ★★★★★ |
| Epoxy | ≥12 μm | Black | ★★★ | ★★★★★ | ★★★★★ |
| NiCu+Epoxy | ≥15 μm | Black | ★★★ | ★★★★★ | ★★★★★ |
| Passivated | ≤2 μm | Silver Grey | —— | —— | ★★★ |
| Phosphated | ≤2 μm | Silver Grey | —— | —— | ★★★ |
Magnetized direction of disc / round neodymium magnet
Most of disc neodymium magnet are axial magnetized.But there are some application scenarios that require magnetization of its diametrical direction.If you have special requirements for magnetization,for example,multi-poles on one side,we'll help you to make it happen.
 |
 |
| Axial Magnetized | Diametrical Magnetized |
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Mechanical Physical Property Of Sintered NdFeB Magnet
| Parameter | Unit | Reference Value | |
| Vickers hardness | Hv | ≥550 | |
| Density | g/cm3 | ≥7.50 | |
| μr Recal Penmeability | ＼ | 1.05 | |
| Tc Curie point | ℃ | 312～380 | |
| Specific resistance | μΩ·cm | 150 | |
| Bending strength | MPa | 250 | |
| Compressive strength | MPa | 1000～1100 | |
| Compressive strength | Thermal expansion | ℃－1 | - (1～3)×10－6K |
| （⊥Thermal expansion） | (⊥) | ||
| Compressive strength | Thermal expansion | ℃－1 | (3～4)×10－6K |
| （∥Thermal expansion） | (∥) | ||
Demagnetization Curves Of Sintered NdFeb Magnet (B-H Curves)
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| N52 | N50M |
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| N48SH | N45UH |
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Tel ：+86-769-88015513 , Zip Code: 523000
Mobile ：+86-13266004656（Jennifer Lin）
WhatsApp：+86-13266004656
E-mail:LZ@junhuimagnet.com
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