Custom Neodymium Ring Magnet for Motor and Speaker
Product Description
Neodymium is a ductile and malleable silvery-white metal. Neodymium is strongly paramagnetic. The major application of neodymium is in high-strength permanent magnets based on Nd2Fe14B that are used in high-performance electric motors and generators, as well as in spindle magnets for computer hard drives and wind turbines. Neodymium magnets are available in a wide range of shapes, sizes and grades.Ring magnets are like discs or cylinders, but with a center hole.
Ring NdFeB Magnet Characteristics
1. High Operating temperature
The N48H neodymium ring magnets have excellent temperature resistance. For the NH series NdFeB magnets, the maximum operating temperature can reach 120 ℃.
|
Neodymium Material |
Max. Operating Temp |
Curie Temp |
| N35 - N55 |
176°F (80°C) |
590°F (310°C) |
| N33M - N50M |
212°F (100°C) |
644°F (340°C) |
| N30H - N48H |
248°F (120°C) |
644°F (340°C) |
| N30SH - N45SH |
302°F (150°C) |
644°F (340°C) |
| N30UH - N40UH |
356°F (180°C) |
662°F (350°C) |
| N30EH - N38EH |
392°F (200°C) |
662°F (350°C) |
| N32AH |
428°F (220°C) |
662°F (350°C) |
2. Physical and Mechanical Characteristics
|
Density |
7.4-7.5 g/cm3 |
|
Compression Strength |
950 MPa (137,800 psi) |
|
Tensile Strength |
80 MPa (11,600 psi) |
|
Vickers Hardness (Hv) |
550-600 |
|
Electrical Resistivity |
125-155 μΩ•cm |
|
Heat Capacity |
350-500 J/(kg.°C) |
|
Thermal Conductivity |
8.95 W/m•K |
|
Relative Recoil Permeability |
1.05 μr |
3. Coating / Plating
Options: Ni-Cu-Ni, Zinc (Zn) , Black Epoxy, Rubber, Gold, Silver, etc.
4. Magnetic Direction
Ring magnets are defined by three dimensions: Outer Diameter (OD), Inner Diameter (ID), and Height (H).
The magnetic direction types of ring magnets are axially magnetized, diametrically magnetized, radially magnetized, and multi-axially magnetized.
Packing & Shipping
