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E-mail : Sales@linkupmagnets.com
Sintered neodymium 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.
Block NdFeB magnets are used in applications such as medical,motors,lighting system,sensor,holding application,consumer electronics,consumer products,automotive and etc.
Avaliable sizes and tolerance of block NdFeB magnet
Relying on experienced production team and strong maching capability,most sizes of neodymium magnet can be produced with very high quality and precision,and the tolerance can be controlled within +/-0.05mm or +/-0.1mm.
Please see below available sizes of block neodymium magnet.
| Length | Width | Thickness |
| 1mm ≦ L ≦ 240mm | 1mm ≦ L ≦ 100mm | 1mm ≦ L ≦ 80mm |
The difference between 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 produce 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 | —— | —— | ★★★ |
Magnetzation direction of block NdFeB magnet
Most of block neodymium magnet are magnetized through thickness.But there are some applications that require magnetization of its length or width direction.If you have special requirements for magnetization direction,please do not hesitate to let us know.
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| Magnetized Through Thickness | Magnetized Through Width | Magnetized Through Length |
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