This is a ring magnet used on hand cranked generators. The material is bonded neodymium iron boron, which has weaker magnetic properties than sintered neodymium iron boron. It is made by pressing the mold. The outer diameter of the magnetic ring is 22mm, the hole is 20mm, the thickness is 6.2mm, and the wall thickness is only 1mm. This is also a common wall thickness for bonded neodymium iron boron, and it can be thinner, such as 0.6mm. The surface magnetic strength measurement is around 1600 Gauss. In addition, it can also be used for brushless motors, magnetic sensors, electric tools, and so on.
Our company has many bonded NdFeb magnet molds. You can also see from the website that there are more complete specifications in the column. If you want to save costs, we can just help you!
See more magnets of the same material: Bonded neo magnets
An introduction to bonded molded magnets;
Is bonded NdFeB a composite material?