Radiation ring NdFeB magnet are produced in two method, one is normal radial orient pressed magnets, another is new technique- hot press radial magnets. In rotor of motor, here we mostly need a radiation ring that magnetized it into 4/8/10/12/18/20 poles, to get a big flux field. Sometimes we use a flat 4/8 poles magnetized ring, it’s economic choice, for those consumer market.
Multipole ring Ndfeb magnet is used in widely applications, Deko magnetics offers a widely size, from micro ring to big ring magnets. Typical sizes are : D10xd5x2 mm, D300xd200x10 mm