The magnet is a multipolar Ndfeb magnetic ring, the material is bonded neodymium magnets, there are 12 magnetic poles, using the radial inner diameter magnetization, the use of surface for the inner side, the outer diameter of the ring magnet is 28mm, the inner diameter of 24mm, the height of 10mm, the surface black electrophoresis, the measured surface magnetic field intensity of about 2680 Gauss, mainly used in the field of DC motor.
Multi-pole bonded neodymium magnetic ring D28x24x10mm physical pictures;

Motor radial multipole ring neodymium magnet 12 pole magnetizing pole distribution display

The same material with the same pole magnet recommended;
Ferrite grade, sintered ferrite magnetic property parameter table
NdFeB magnet grade, Sintered neodymium magnet performance grade parameter table
Neodymium(Ndfeb) Magnet Material Safety Data Sheet
Sintered Ferrite Material Safety Data Sheet Pdf
Magnetic properties grade parameters of smco rare earth magnets
This is a radial 4-pole ring (Hollow cylinder) magnet, the material is bonded NdFeB, with high magnetic performance, the size is 16mm outer diameter, inner hole 5mm, height 20mm, surface gray epoxy treatment, suitable for water pump motor...
This product is a 4-pole ring magnet, injection-molded ferrite material, the sample size is 22mm outer diameter, 7mm inner diameter, 4mm thickness, 2 N poles and 2 S poles, mainly used for push rod motors, magnetic induction devices, encoders, etc.,...
This product is a multi pole magnetic ring with an inner diameter of 1.5mm. The material is injection molded ferrite. It adopts axial multi pole magnetization and is mainly used for DC motors. If you have a sample of similar injection molded magnetic products, please contact us for quotation....
Need 20-pole ring magnets? Welcome to contact NST. Our company has many stock sizes. The sintered ferrite magnetic ring uploaded today has an outer diameter of 30.8mm, a hole of 21.3mm, and a thickness of 5mm....
This product is a radially magnetized 10-pole (5N5S) ring magnet, the material is bonded NdFeB, the surface coating is black epoxy, the magnet size is 27mm outer diameter, 22.7mm inner diameter, 21mm height, if you feel this specification If you are interested, you can contact our company for a quotation, provide samples...
This product is a 12 poles axial ferrite ring designed for rowing machines. It features a relatively large central bore and is manufactured from high-performance sintered ferrite material....
If you are looking for a 6-pole (3-pole pair) multi-pole ferrite ring sample, take a look at this one. Made of sintered ferrite, it has an outer diameter of 26.5 mm, an inner bore of 12.5 mm, and a thickness of 3 mm....
This product is a radial 8-pole rotor magnet. The material is injection-molded ferrite. The surface has no special treatment. At present, our company can provide injection-molded magnetic products with various properties, including injection-molded ferrite, injection-molded NdFeB and injection-molded ferrite....