1. Material: Sintered neodymium magnet
2. Shape: Ring
3. Dimensions: 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,Diametrical or Radial magnetized
7. Max working Temp.: 80℃-220℃
8. Tolerance: +/-0.05mm or +/-0.1mm
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.
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 ring 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 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 |
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 | —— | —— | ★★★ |
Aaxial
magnetized and diametrical magnetized are the most commonly used
magnetization methods for ring neodymium magnet.Radial magneized also
can be achieved,however,its size and performance are limited,and the
cost of mould development is relatively high.
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Axial Magnetized | Diametrical Magnetized |
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Radial Magnetized 2 Poles | Radial Magnetized 8 Poles |
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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 |
Address :10 Chuangye Road, Yuanjiayong, Nanhuang Road, Zhongtang Town, Dongguan City, Guangdong
Tel :+86-769-88015513 , Zip Code: 523000
Mobile :+86-13266004656(Jennifer Lin)
WhatsApp:+86-13266004656
E-mail:LZ@junhuimagnet.com