Tel : +86-592-2069826
E-mail : Sales@linkupmagnets.com
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.
Epoxy coated neodymium magnet has great corrosion resistance,NiCu+Epoxy coating is excellent as a barrier for humid environment.
Available sizes and tolerance of sintered neodymium magnet
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.
Round/disc neodymium magnet
| Magnetization Orientation | Diameter | Thickness |
| Axial Mangetized | OD ≦ 240mm | T ≦ 80mm |
| Diametrical Magnetized | OD ≦ 80mm | T ≦ 60mm |
Block neodymium magnet
| Length | Width | Thickness |
| 1mm ≦ L ≦ 240mm | 1mm ≦ L ≦ 100mm | 1mm ≦ L ≦ 80mm |
Ring neodymium Magnet
| Magnetization Orientation | Outer Diameter | Inner Diameter | Thickness |
| Axial Mangetized | OD≦ 240mm | ID ≧ 1 | T≦ 80mm |
| Diametrical Magnetized | OD≦ 80mm | ID ≧ 1 | 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 | —— | —— | ★★★ |
Magnetization orientation of neodymium magnet
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| Axial Magnet | Diametrical Magnetized | Axial Magnetized | Diametrical Magnetized |
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| Axial Magnetized | Diametrical Magnetized | Axial Magnetized (N-S) | Axial Magneized (S-N) |
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| Through Thickness | Through Width | Through Length | Diametrical Magnetized |
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Diametrical Magnetized (N-S) |
Diametrical Magnetized (S-N) |
Through Thickness | Through Width |
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Radial Magnetized 2 Poles |
Radial Magnetiezd 8 poles |
Radial Magnetized Skewed 8 Poles |
Axial Magnetized |
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