Specification Brand : AOMAG BulletPoint1 : Magnetic direction: Uni-pole Radial Oriented; SGS safety Certified. BulletPoint2 : Magnetic force: 3500 gauss BulletPoint3 : Widely used in all kinds of PM servo motor, step motor, tachogenerators,bldc motors. BulletPoint4 : Quantity: 1 Radial ring magnet per package BulletPoint5 : 【Professional Brand】- We are professional Refrigerator Magnets Seller and you can find any magnets you want in our store. Any question please contact us freely. Give full play to your imagination, Try Magnets, Try everything! Color : White,silver ExternallyAssignedProductIdentifier : 5055641299271 IncludedComponents : Magnets ItemName : AOMAG® Uni Pole Radial Oriented Magnetization Neodymium N40H Large Ring Magnets Unipolar Diametrically Magnetized Od 70 X Id 58 X 30mm ItemPackageDimensions_Height : 21.2 centimeters ItemPackageDimensions_Length : 1.5 centimeters ItemPackageDimensions_Width : 13.1 centimeters ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : industrial-rare-earth-magnets Manufacturer : AOMAG Material : Neodymium ModelNumber : AOM05648789 NumberOfBoxes : 1 NumberOfItems : 1 NumberOfPieces : 1 PackageLevel : unit PartNumber : AOM05648789 ProductDescription : Importance Note: Please leave a comment about N pole outside or inside. if not, we will send radomly. radial ring magnets features: 1, Radial maximum energy product can reach 240 ~ 400kJ/m3 high magnetic. 2, It can be manufactured to facilitate bonding, the long dimension of the annular magnet assembly. 3, you can easily change the number of poles and the magnetic declination simply by the change of the magnetic coil. 4, Inner and outer circumferences monopole with magnetic as you required. 5, Rectangular wave, trapezoidal wave, sin function with magnetic waves. (Function waveform, please contact us) 6 trails, thin-walled, long size (for example: the outer diameter of 5mm wall thickness of 0.5mm, length 80mm) contributes to the miniaturization of the motor. Up until recently, full magnetic rings (FMR) made of separate magnets conjoined together to create the desired ring shape, were the only solution for applications requiring circular-shaped multi-pole magnets.Now, a new technology powered by FUZHOU AO MAGNET ELECTRONIC CO.,LTD. has enabled for the creation of a super strong, durable single-cast radially magnetized ring magnet.radiation ring magnet use for automotive electric power steering system, quiet, smooth sense of control, and easier to install. AC servo motor, DC motor can achieve a quiet and smooth operation of this feature, it is also used for the precision operation of the robot is required. We are manufacturer and supplier of Radial Ring Magnets from 1996. So far we have uni pole radial ring magnets in stock as below: D26*d20*14mm (In stock) D32*d24*17mm (In Stock) D37*D27.5*5.5mm(In stock) D52.8*d40*8mm (In Stock) D58*d50*20mm (In Stock) D70*d62*20mm (In stock) D70*d58*8mm (In stock) D70*d58*30mm (In stock)