The main sample in the picture is an injection molded multipole ferrite magnetic ring specially designed for encoders, which belongs to a customized irregular ring shape. The outer diameter size is about 46.9mm, the middle hole is 22.8mm, and the thickness is 4mm. It is magnetized with two coils. If your application requires a multipole ring magnet in this shape, please contact us.
Encoder with special ring multipole magnet physical picture;
More magnets for encoders;