This is a single-sided axial multi-pole magnetized ring magnet, the number of magnetized poles in the inner and outer rings is different, the outer ring is 64 poles, the inner ring is 62 poles, it is paired magnetizing. The material is injection molded ferrite, without aluminum bracket, there are also models with aluminum bracket, This magnet is generally used in encoder, robotic arm.
Other types of encoder magnet rings;
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Similar magnet recommended;
Magnetic encoder multipole ring magnet 62 64 pole OD 34mm
Multipole double coil rubber magnetic ring for encoder D49x25x2mm