Ring Magnet 18-10x4 mm ,neodymium magnet -Ni coating 8.12kg Pull(North) .

1. Grade cover N35-N52, N30M-N50M, N30H-N48H, N30SH-N45SH, N28UH-N40UH,N28EH-N38EH.
2. Working temperature for NdFeB Permanent magnets: From 80centigrades to 230 centigrades.
3. Can be magnetized according to therequirements of clients.
4. Coating: Nickel, Zinc, Golden, Black epoxy, Greyepoxy, Phosphating and so on.
5. Application: Motor, Speaker, Jewelryindustry .

(Grade: From N35 to N52
segment, block, cube, cylinder, disc, ring, rod, sphere, etc,Any Shape

Widely used in different applications, such as sensors, motors, rotors, wind turbines/wind generators, loudspeakers, magnetic hooks, magnetic holder, filters automobiles and so on.

Sintered Neodymium NdFeB Magnets are one of the highest property and strongest permanent magnet by now, Sintered Neodymium (NdFeB) Ring Magnets are made through powder metallurgy manufacturing techniques. They are mainly composed of neodymium(32%), iron(64%), boron(1%), and a few rare earth material, such as Dy, Tb, Co, Nb, Ga, Al, Cu, etc.

Sintered Neodymium NdFeB Magnet is regarded as "Magnet King" due to its high magnetic performance, coercive force and maximum energy product. With the rapid development of Sintered Neodymium (NdFeB) Magnet , many high-tech products are developed. At the same time, because of its high magnetic performance, coercive force and maximum energy product, the Sintered Neodymium NdFeB Ring Magnet is widely used in servo motor, flat brushless motor, step motor, IT products, Nuclear Magnetic Resonance, speaker and other products.

The Sintered Neodymium (NdFeB) Magnets are easily rust and oxidated, so their surface must be plated with Ni-Cu-Ni, Zn, Ni, Silver, Gold or made phosphor and epoxy treatment.

We, Risheng Magnets has advanced scientific research and production equipments, strictly following ISO9001 Quality Management System to manufacture. We have continuously strengthened our inner management, from melting, milling, sintering and then process, all the working procedure are very perfect. Our manufacturing technique are excellent, we can supply various dimension Sintered Neodymium (NdFeB) Magnets with high magnetic property and with high temperature resistance. The mainly higher product Grade is N45, N48, N50, N52, 48M, 50M, 48H, 42SH, 44SH, 38UH, 40UH, 33EH, 35EH.

The Drawing of our High Quality Sintered Neodymium NdFeB Magnets:

Physical properties   

Temp.Coeff.OfBr     0.11%ºC     Temp.Coeff.OfHc    -0.60%ºC

Density 7.3-7.5g/cm²     ElectricalResistivity   114μ.Ω.Cm

Vickers Hardness     600Hv   FlexuralResitivity 25kg/mm

Tensile Strength 8.0Kg/mm² Coeff.OfThermal Expansion   4x10¯³/ºC

Specific Heat     0.12Kcal/Kg ThermalCondustivity 7.7kcal/[m.h.ºC]

Young's Modulus      1.6X10[11]N/m² Rigidity0.64N/m²

Poisson's Ratio0.24     Compressibility9.8x10-12m²/N

Curie Temperature   310-340ºC

Magnetic parameter and Conversion table        

UnitandSymbolSl-unitsConversiontable

Flux Density B    T(Telsa)      1T=1Vs/m²=10kGs

Polarization J     T(Telsa)      1T=1Vs/m²=10kGs

Magentic Field strength H      A/m      1A/m=0.4τOe=1.257Oe

Energy density(BH)m     KJ/m³   1KJ/m³=0.126MGOe

Magnetic Flux Φ Wb(Weber) 1Wb=1Vs=10Mx

Ourproducts

The Introduction of NdFeB Magnets' Applications:  

1, Electro-acoustic field: such as loudspeaker, headphone, earphone, stage sound device, alarm, microphone and so on. Because of good performance, our magnets can provide sound equipments better sensitiveness and susceptibility.

2, Electric products: Permanent magnetic actuator vacuum circuit breaker, magneticlatchingrelay, watt-hour meter, watermeter, sensor, reed switch and so on.

3, Motor areas: VCM, CDVD-ROM, generator, electromotor, servo motor, vibration motor, step motor, DC motor, linear motor and so on. Our magnets with stable performance and high HCJ can work under high temperature which can guarantee your products work better.

4, mechanical equipment: magnetic separator, magnetic holder, and other magnetic machines.

5, Health care: nuclear magnetic resonance spectrometer, medical apparatus and instruments,

magnetic therapy and health care products, fuel-saving magnetizer and so on. Our stable permanent magnets used in health care areas will make people healthier.

6, Other fields: bags magnets, toy magnets, craft gifts and packaging, doors and windows magnets, magnetic locks, magnetic holding devices and so on.