This is a round magnet with center hole, is made of rare earth neodymium. The specific size is 30mm in outer diameter, 20mm in inner diameter, 2mm in thickness, This magnet belongs to permanent ring magnet, and is one of the more popular magnets on the market. The direction of magnetizing is thickness, it also called axially. The hole of magnets if you want to use with screw, we can process countersunk hole(M4, M3 or other size)
The application of 30mm diameter round magnet with big hole:
The application range of ring magnets is very wide. This magnet can be widely used in electronic products, speaker magnet, industrial magnet, motor magnet and so on. Magnet specifications can be customized according to product model size.
Relevant size ring strong magnet;