BNP-6 Bonded NdFeB Radial Magnets for Cellular Phones Specification:
Shape Ring
Grade BNP-6
Size OD16*ID6.4*8
plating black epoxy
Material: Bonded Neodymium
features: multipoles radial ring magnet
coating:epoxy plated
application:Motor Rotor Sensor
Br: 5900-6500 KGS
Hcb ≥302-374 KA/m
Hcj ≥7.5-10.0 KA/m
(BH)max 44-53.6 KJ/M3
Temp. Coefficlent 120°C
The product can be customed by your requirement.
MPCO Magnet Company is specialized in making ndfeb rotor magnets . It has hundreds of wire cutting machines running day and night. We can make high quality rotor magnets ndfeb, esepecially for those motors with certain working temperature requirement. We can supply oven test to ensure temperature resistance.
Bonded magnets are an important but often overlooked group of products that magnetic circuit and device designers should consider when choosing the optimum permanent magnet type for their specific application need. In their most basic form bonded magnets consist of two components; a hard magnetic powder and a non-magnetic polymer or rubber binder. The powder may be hard ferrite, NdFeB, SmCo, alnico, or mixtures of two or more magnetic powders known as hybrids. In all cases, the powder properties are optimized through processing and chemistry specifically aimed at utilization in a bonded magnet. The binder that holds the magnetic particles in place can produce either a flexible or rigid magnet. Typical binders for flexible magnets are nitrile rubber and vinyl. Binders for rigid magnets include nylon, PPS, polyester, Teflon, and thermoset epoxies. Bonded Magnet Materials and Processing Options
The thermoplastic binders may be formed into sheet via a calendaring or extrusion or formed into various complex shapes using injection molding.
Compression bonding almost exclusively combines isotropic NdFeB powders with a thermoset epoxy binder using a uniaxial room temperature pressing process. A major advantage of bonded magnet processing is near net shape manufacturing requiring zero or minimal finishing operations compared to powder or cast metallurgical processes. In addition value added assemblies can be economically produced in a single operation. Casting AlNiCo Speaker Magnet
| Proprty Grade | Br (mT) | Br (Gs) | Hcb (kA/m) |
Hcb (kOe) |
Hcj (kA/m) |
Hcj (kOe) |
(BH)max (kJ/m 3) |
(BH)max (MGOe) |
Tw/ ºC |
| BNP-3 | 450-510 | 4500-5100 | 199-263 | 477-597 | 6.0-7.5 | 24-32 | 24-32 | 3.0-4.0 | 120 |
| BNP-6 | 590-650 | 5900-6500 | 302-374 | 597-796 | 7.5-10.0 | 44-53.6 | 44-53.6 | 5.5-7.0 | 120 |
| BNP-8 | 620-670 | 6200-6700 | 390-454 | 636-796 | 8.0-10.0 | 60-68 | 60-68 | 8.0-9.5 | 120 |
| BNP-8SR | 620-660 | 6200-6600 | 405-470 | 955-1114 | 12.0-14.0 | 65.6-72 | 65.6-72 | 8.2-9.0 | 160 |
| BNP-9H | 650-700 | 6500-4000 | 421-484 | 915-1034 | 11.5-13.0 | 72-80 | 72-80 | 9.0-10.0 | 160 |
| BNP-10 | 680-720 | 6800-7200 | 413-477 | 636-796 | 8.0-10.0 | 76-84 | 76-84 | 9.5-10.5 | 120 |
| BNP-11 | 700-740 | 7000-7400 | 430-493 | 636-796 | 8.0-10.0 | 80-88 | 80-88 | 10.0-11.0 | 120 |
| BNP-12L | 730-770 | 7300-7700 | 366-430 | 517-637 | 6.5-8.0 | 84-92 | 84-92 | 10.5-11.5 | 110 |
Rare Earth Permanent Bonded Neodymium Ring Magnets With 12 Poles Magnetization, Rare Earth Bonded Neodymium Ring Magnets
Surface Treatment
Although plastic bonded ndfeb magnets have a good corrosion resistance, we still advise to make a coating for them so that the durability is optimal. Epoxy is the most commonly used plating for bonded ndfeb magnet. You can find more information from our Magnet Coating Page.
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