We are the 100% right hi-tech OEM manufacturer which specializesin producing the third generation of rare earth permanent magnets.We can produce various grades and specifications of sintered NdFeBmagnets in high quality, such as N45~N52, N30M~N48M, N27H~N48H,N27SH~N45SH, N25UH~N40UH and N25EH~N38EH ect.. Every year, ourcapacity turns out 1,000 tons of sintered NeFeB magnets.

Neodymium iron boron (NdFeb) magnets, also known as rare earthmagnet and neo magnets, offer the best value when comparingperformance, size and cost. Neodymium iron boron magnets, normallycalled neo and rare earth magnets, are moderate in price andtypically allow for dimensional reductions. Neo magnets or rareearth magnets have poor resistance to corrosion and should have acoating or plating applied. Consideration should be given to thegrade of alloy when exposing Neodymium iron boron ( neo and rareearth magnets ) to temperatures above ambient room. Neo ( rareearth and Neodymium iron boron ) magnets have good resistance toexternal demagnetization fields because of its high IntrinsicCoercive Force (Hci). This resistance makes Neodymium iron boronmagnets an excellent choice for electromechanical applications.

(NdFeb) Neodymium Iron Boron Magnets Manufacturing Process

Fully dense Neodymium Iron Boron Magnets "neo magnets & rareearth magnets" are usually manufactured by a powdered metallurgicalprocess. Micron size Neodymium and iron boron powder is produced inan inert gas atmosphere and then compacted in a rigid steel mold orin a rubber mold. The rubber mold is compacted on all sides byfluid and it is referred to as isostatic pressing. The steel moldswill produce shapes similar to the final product, while the rubbermold will only create large blocks (loaves) of Neodymium iron boron"commonly known as neo or rare earth" magnet alloy. The Neodymiumiron boron alloys magnetic performance in both compacting methodsis optimized by applying a magnetic field before or during thepressing operation. This applied field imparts a preferreddirection of magnetization, or orientation to the Neodymium IronBoron Magnet alloy. The alignment of particles results in ananisotropic alloy and vastly improves the residual induction (Br)and other magnetic characteristics of the finished rare earthmagnet named Neodymium Iron Boron magnet which is also called "neomagnet". After pressing, the neo "Neodymium Iron Boron" magnets aresintered and heat treated until they reach their fully densecondition. The die pressed neo / rare earth magnets are ground tothe final dimensions, but the brick magnets from the rubber moldmethod are usually squared on large grinders and then sliced to thefinal geometry. Isostaticly pressed alloy has higher magneticproperties than the die pressed material, but it may lack theuniformity. The choice of Neodymium iron boron "rare earth / neo"magnet manufacturing method is usually application driven and istypically not a concern of the customer.



(NdFeb) Neodymium Iron Boron Magnets TemperatureCharacteristics
Sintered Neodymium Iron Boron "neo / rare earth" magnets aresusceptible to demagnetization when exposed to elevatedtemperatures. There are many grades which can withstand hightemperatures, but several factors will dictate the performance ofthe Neodymium Iron Boron magnet. One of the most pertinentvariables is the geometry of the neo / rare earth magnet ormagnetic circuit. Neo / rare earth magnets which are thin relativeto their pole cross-section (Magnetic Length / Pole Area) willdemagnetize easier than neo magnets which are thick. Magneticgeometries utilizing backing plates, yokes, or return pathstructures will respond better to increased temperatures. Themaximum recommended operating temperatures listed on the Neodymiumiron boron magnet magnetic characteristics page does not take intoaccount all geometry conditions. Please contact us for Neodymiummagnets design assistance when elevated temperatures are involvedin your application.

(NdFeb) Neodymium Iron Boron Magnets Corrosion Characteristics(Surface Treatment)
Neodymium Iron Boron, also called neo and rare earth magnets, arevery susceptible to corrosion. A variety of coating and platingoptions are available to protect your neo magnet from theenvironment. The rapid oxidation of Neodymium magnets requiresrigorous surface preparation before coating or plating. MostNeodymium Iron Boron magnet surface treatment facilities are notfamiliar with this type of magnet alloy and are not capable ofsuccessfully coating or plating it. Neodymium Iron Boron does nottake plating like other metal alloys and it will corrode from theinside-out. Our team member will assist with the selection of bestNeodymium Iron Boron, "rare earth / neo" magnet surface treatmentoption for your application.

(NdFeb) Neodymium Iron Boron Magnets Machining
Neodymium Iron Boron also called neo and rare earth magnets,material is very hard and brittle. On average, this rare earthmagnet materials hardness is 58 Rc and conventional machine toolsand cutters are not appropriate. The hardness combined with thepowder metal grain/crystal structure inhibits the use of carbidetools. Diamond tooling, electrostatic discharge machines (EDM), andsome abrasives are the conventional means of fabrication for neo /rare earth magnet alloy. Another concern with machining is thevolatility of the powder or dry grinding swarf. These particles cancombust while machining or in swarf storage containers. Machiningwill also remove the "skin" of the Neodymium Iron Boron magnetalloy and make the material more susceptible to corrosion. Mostmagnet materials are machined in the un-magnetized state. once thefabrication and cleaning operation are complete the magnet is thenmagnetized to saturation.

We are capable of fabricating simple or complex shapes fromNeodymium Iron Boron (NdFeb) magnet alloy. We stock a variety ofstandard and exotic Neodymium grades for production or prototypefabrication.

We can help determine if custom machining is required or if"pressed to size" geometry is possible. The determining factors areusually required lead-time, cost, and the alloy required.

(NdFeb) Neodymium Iron Boron Magnets Magnetizing
Neodymium Iron Boron magnets, commonly known as neo magnet, are arare earth magnet and require a large magnetizing field. The largemagnetizing fields require special equipment and Neodymium magnetsare not generally magnetized by customers. The anisotropic natureof sintered Neodymium magnets results in a single direction ofmagnetization. This direction must be observed when magnetizing andwhen integrating the magnet into the final magnetic assembly. Oftentimes an indicator is used to identify a specific magnetic pole forthe customer''s Neodymium iron boron (NdFeb) magnet assemblyprocess. This indicator can be a simple paint dot or a laserengraved mark.

The high field required for magnetizing Neodymium Iron Boron willoften times restrict the design of the Neodymium magnet orNeodymium magnetic assembly. Many variables must be taken intoaccount and we can assist with the design process.