Sintered NdFeB Magnet Ring Disc 1. Arc or rectangular magnet. 2. Zinc coating to protect the surface. 3. Used for electric motors 1. Magnet: Neodymium magnet 2. Characteristics: Super strong Br resident induction. Excellent demagnetization resistance capability. 3. Surface Treatment Method: Black Nickel, Chroming, Copper, Epoxy, Gold, Nickel, Nickel+Epoxy, Nickel+Sn, Passivation, Zinc, phosphating 4. Applications of Neodymium Magnets: AC Motors, DC Motors, servo motors, step motors Computer rigid disc drives Magnetic Separators Magnetic resonance imaging Speakers & earphones Medical care machines Parameter unit Standard Data Curie Temperature(Tc) ºC 310-380 Maximum Operating Temperature(Tw) ºC 80-200 Hardness Hv 620 Electrical Resistivity Ω.CM 1.8X10-4 ~2.0X10-4 Density(D) g/cm3 7.5~7.65 Recoil Permeability µ rec 1.05 Magnetization Field Strength(Hs) KOe > 30 KA/m > 2400 Bending Strength Mpa 295~345 Temp. Coefficient of Br (aBr) %/ºC -0.11~ -0.12 Temp Coefficient of Hcj (aHcj) %/ºC -0.5~ -0.7 Company Profile Test Equipment & Workshop • Demagnetization Curves & Outgoing Inspection Report for each shipment. Packaging & Shipping Standard Packaging • Vacuum packaging for all Neodymium magnets and Neodymium magetic assemblies. • Shielding box and wooden box to protect the Neodymium magnets during shipping. Shipping Methods • Contract price with FedEx, DHL, UPS and TNT to minimum your shipping cost. • Experienced shipping forwarder for Ocean and Air shipments. FAQ