Product Name: Strong Permanent NdFeB Magnetic Segment Neodymium Magnet with Hole with High Quality Model NO.: N30-52(H, SH, UH, EH, M, etc) Composition: Neodymium Product Type: Rare Earth Magnet Application: Motor or Industrial Magnet Preparation Method: Customized Purification Method: Customized Shape: Segment with Hole Certification: RoHS, CE Coating: Nickel Export Market: Global Delivery: 3-25days Performance: Customized Trademark: HJ Transport Package: Carton Specification: RoHS Origin: China HS Code: 85051110 Product Description Composite: Neodymium, NdFeBModel Number: N35-N52, 30H-48H, 30SH-45SH, 30UH-40UH, 28EH-35EHMagnets coating: Zinc, Nickel, Epoxy, Nickel-copper-nickel, GoldMagnetizing direction: Axial, Radial, Quadrupole, Octupole1. Magnetic materials categoryMagnetic materials basically contain Ferrite and Alnico, Sm-Co and Nd-Fe-B.The rare earth permanent-magnet material contains Sm-Co and Nd-Fe-B.At present the products widely applied are Ferrites. The product is inexpensive, following is the Nd-Fe-B.The temperature stability of Alnico and Sa-Co are better than the Nd-Fe-B. So in some pointer instrument, military supplies and luxury goods, Al-Ni-Co and Sm-Co materials are widely used.Curie temperature of Ferrites is 465degree, Nd-Fe-B 's is 310degree, Alnico's is 800degree, Sm-Co 's is 700--800degree. Therefore, temperature stability of Nd-Fe-B is the worst. But the performance is highest, which are called "magnetism king", Currently manufacture craft of magnetic materials is sintered and binder. As the binder are added adhesive bonding, the magnetism performance will not be high, but the product precision is high.2The feature of sintered NdFeB magnetsNdFeB permanent materials are based on the inter-metallic Nd2Fe14B which has a vital high BH and Hcj. The advantages of high energy density makes NdFeB permanent magnetic material widely used in the modern industry and electronic applications, which makes instruments, generators, magnetic separators etc smaller, lower weight, thinner.The advantages of NdFeB are that the cost performance is very high and have good mechanical properties while the disadvantages are that the curie temperature are too low, temperature feature is not good. We have to change its chemical composition and do surface treatment to promote its characters and to achieve actual applications.The process of sintered NdFeB magnets is powder metallurgy, the smelted alloy powders are pressed into mould in the magnetic fields, the compression moulding are sintered into densified products. We usually do thermal effect processing in order to promote the Hcj of the magnets.1.Grade cover N35-N52, N30M-N50M, N30H-N48H, N30SH-N45SH, N28UH-N40UH, N28EH-N38EH.2.Size and Shape:D3--D280mm(round)Cylindrical, Ring, Square, Holed Square, Watt, Arch, or Customized.3.Coating: Nickel,Nickel copper nickel,Zinc, Golden, Black epoxy, Grey epoxy, Phosphating and so on.4.Direction of magnetisation:Through the thickness or through the diameter.a. Magnetization thickness B. Axial magnetization C. Symmetric magnetization D. Multipole magnetization E. Radial magnetization. Special requirements for custom magnetization5.Application of NdFeB magnet: Toys, Package, Printer, Switchboard, Phone, Vcoil motors (VCM's) in hard disk drives, High performance(maglev, linear and rotary) motors, Bearings, Eddy-current brakes, Brushless DC motors, Magnetic separation, Magnetic resonance imaging, Sensors, Loudspeakers, Jewelry industry and etc.6.Advantage1)Excellent temperature stability2)Small size and light weight3)Strong magnetism4)Relatively high energies characterize5)High performance-to-price ratio,widely usedMagnetic material is not standard product,so you can provide details information to us to make it.1.Choose the product grade you need.GradesN35-N52N35M-N50MN35H-N48HN35SH-N45SHN30UH-N40UHN30EH-N38EHW T80°C/60°C100°C 120°C150°C180°C200°C- The grades like N48-N52 could meet your requirement on strong power- Standard one like N35 or N38 is okay for your normal applications- If you have requirement on the working temperature, please note it.2.Magnetic direction3.Choose the coating you want.4.Choosethe product sizeyou need.5.Packaging&Shipping1)By Sea: As the magnets have strong attraction and we will use the spacer to apart the magnets each other in case people will be hurt when take it out. Then, they will be packed in a white box of pieces each, several boxes to a carton. (Detailed package quantity should be made upon the real products)2) By Air: If the goods will be shipped by air, all the magnetic should be degaussed and we will use Iron sheet to shield.6.Payment7.Frequently asked questions1) What is the normal size of your product? All magnets are custom made.2) What information do I need to provide when I ask? If you have any enquiries, please inform us of the following:a.Size or drawing with tolerances.b.Grade of material or magnetism.c.magnetic directiond.Surface coating (if necessary)e.Quantity and delivery conditions.3) How long will you give me an answer? We'll get back to you in 24 hours.4) What's the price? We will try our best to satisfy you.5) Can I have a sample? Yes, we have stock in stock. We can help you get the sample as soon as possible.6) How long will you deliver samples and bulk orders? If we have stok, we can send it in 3 days. If we do not have stock, the production time of samples is 5-10 days and the time of bulk order is 15-25 days.8.Our Factory Profile9.Grade Instructions/ Sintered NdFeB MagnetGrade Residual Induction (Br)Coercive Force (Hcb)Intrinsic Coercive Force (Hcj)Max Energy Product (BH)maxTemp. Coefficient TkMax Working Temp.Curie Temp.TkGskA/mkOekA/mkOekJ/m³MGOe%/ºC(Br)%/ºC(Hcj)ºCºCN351.17-1.2211.7-12.2≥868≥10.9≥955≥12263-28733-36-0.12-0.7080310N381.22-1.2512.2-12.5≥899≥11.3≥955≥12287-31036-39-0.12-0.7080310N401.25-1.2812.5-12.8≥907≥11.4≥955≥12302-32638-41-0.12-0.7080310N421.28-1.3212.8-13.2≥915≥11.5≥955≥12318-34240-43-0.12-0.7080310N451.32-1.3813.2-13.8≥923≥11.6≥955≥12342-36643-46-0.12-0.7080310N481.38-1.4213.8-14.2≥923≥11.6≥955≥12366-39046-49-0.12-0.7080310N501.40-1.4514.0-14.5≥796≥10.0≥876≥11382-40648-51-0.12-0.7060310N521.43-1.4814.3-14.8≥796≥10.0≥876≥11398-42250-53-0.12-0.7060310N35M1.17-1.2211.7-12.2≥868≥10.9≥1114≥14263-28733-36-0.12-0.70100310N38M1.22-1.2512.2-12.5≥899≥11.3≥1114≥14287-31036-39-0.12-0.70100310N40M1.25-1.2812.5-12.8≥923≥11.6≥1114≥14302-32638-41-0.12-0.70100310N42M1.28-1.3212.8-13.2≥955≥12.0≥1114≥14318-34240-43-0.12-0.70100310N45M1.32-1.3813.2-13.8≥995≥12.5≥1114≥14342-36643-46-0.12-0.70100310N48M1.37-1.4313.7-14.3≥1027≥12.9≥1114≥14366-39046-49-0.12-0.70100310N50M1.40-1.4514.0-14.5≥1033≥13≥1114≥14382-40648-51-0.12-0.70100310N35H1.17-1.2211.7-12.2≥868≥10.9≥1353≥17263-28733-36-0.12-0.70120310N38H1.22-1.2512.2-12.5≥899≥11.3≥1353≥17287-31036-39-0.12-0.70120310N40H1.25-1.2812.5-12.8≥923≥11.6≥1353≥17302-32638-41-0.12-0.70120310N42H1.28-1.3212.8-13.2≥955≥12.0≥1353≥17318-34240-43-0.12-0.70120310N45H1.32-1.3613.2-13.6≥963≥12.1≥1353≥17342-36643-46-0.12-0.70120310N48H1.37-1.4313.7-14.3≥995≥12.5≥1353≥17366-39046-49-0.12-0.70120310N35SH1.17-1.2211.7-12.2≥876≥11.0≥1592≥20263-28733-36-0.11-0.65150320N38SH1.22-1.2512.2-12.5≥907≥11.4≥1592≥20287-31036-39-0.11-0.65150320N40SH1.25-1.2812.5-12.8≥939≥11.8≥1592≥20302-32638-41-0.11-0.65150320N42SH1.28-1.3212.8-13.2≥987≥12.4≥1592≥20318-34240-43-0.11-0.65150320N45SH1.32-1.3813.2-13.8≥1003≥12.6≥1592≥20342-36643-46-0.11-0.65150320N28UH1.04-1.0810.4-10.8≥764≥9.6≥1990≥25207-23126-29-0.11-0.60180330N30UH1.08-1.1310.8-11.3≥812≥10.2≥1990≥25223-24728-31-0.11-0.60180330N33UH1.13-1.1711.3-11.7≥852≥10.7≥1990≥25247-27131-34-0.11-0.60180330N35UH1.17-1.2211.7-12.2≥860≥10.8≥1990≥25263-28733-36-0.11-0.60180330N38UH1.22-1.2512.2-12.5≥876≥11.0≥1990≥25287-31036-39-0.11-0.60180330N40UH1.25-1.2812.5-12.8≥899≥11.3≥1990≥25302-32638-41-0.11-0.60180330N42UH1.28-1.3212.8-13.2≥899≥11.3≥1990≥25318-34240-43-0.11-0.60180330N28EH1.04-1.0810.4-10.8≥780≥9.8≥2388≥30207-23126-29-0.11-0.55200330N30EH1.08-1.1310.8-11.3≥812≥10.2≥2388≥30223-24728-31-0.11-0.55200330N33EH1.13-1.1711.3-11.7≥836≥10.5≥2388≥30247-27131-34-0.11-0.55200330N35EH1.17-1.2211.7-12.2≥876≥11.0≥2388≥30263-28733-36-0.11-0.55200330N38EH1.22-1.2512.2-12.5≥899≥11.3≥2388≥30287-31036-39-0.11-0.55200330N40EH1.25-1.2812.5-12.8≥899≥11.3≥2388≥30302-32638-41-0.11-0.55200330N28AH1.04-1.0810.4-10.8≥787≥9.9≥2624≥33207-23126-29-0.10-0.50230350N30AH1.08-1.1310.8-11.3≥819≥10.3≥2624≥33223-24728-31-0.10-0.50230350N33AH1.13-1.1711.3-11.7≥843≥10.6≥2624≥33247-27131-34-0.10-0.50230350N35AH1.17-1.2211.7-12.2≥876≥11.0≥2624≥33263-28733-36-0.10-0.50230350N38AH1.22-1.2512.2-12.5≥899≥11.3≥2624≥33287-31036-39-0.10-0.50230350*.*The above-mentioned data of magnetic properties and physical properties are given at room temperature.*.*The max working temperature of magnet is changeable due to length-diameter ratio, coating thickness and another environment factors.10.How to contact usWelcome to order. Thank you.