The 4-pole ferrite rotor, that is, there are 2 N poles and 2 S poles on the ferrite ring magnet. The hole in the middle of the magnet is used to install the shaft, mainly for radial magnetization. The 4-pole ferrite magnet is introduced below. The magnetization method of the rotor and the magnetization diagram, application, and some of our company's size specifications.
How to magnetize a 4 pole ferrite rotor ring?

First, a ring-shaped ferrite is produced, and then the ferrite is placed in the electromagnet environment as shown in the figure, energized to generate a magnetic field, and a magnetic circuit is formed as required. Finally, the ferrite is magnetized into a quadrupole magnetic ring. 6-pole, 12-pole and other magnetic rings, the principle is the same, but the number of magnetized poles changes.
Schematic diagram of 4-pole ferrite magnet rotor magnetization

Introduction of radial 4-pole ferrite magnet rotor:
Surface magnetic performance: as required, usually around 1000-1600 gauss
Applications: automotive sensors, micro motors, water pump motors, Hall magnetic induction, induction motors, etc.
Specifications: According to customer requirements or provide our existing mold specifications
Material: Y30, can be customized according to customer requirements.
Surface treatment: double-sided grinding machine processing, and internal and external cylindrical grinding.
Processing method: drawings and samples are available, the processing speed is fast, and the product quality is high.
Some 4-pole ferrite rotor magnet size;
Radial 4-pole ring magnet: D15xd8x3.5mm
Radial 4-pole water pump rotor ring magnet: D16xd5x28mm
Radial 4-pole magnetized steel: D21xd7x6mm
Radial 4-pole small magnetic ring: D7x3x4mm
Radial 4-pole magnetic ring: D10*d4.5*10
Radial outer filled 4-pole ring: D40*d17.8*50
Radial quadrupole outer magnet: D21*d11*16
Radial 4-pole rotor magnet: D47.2*d23.2*45
Radial 4-pole motor magnetic ring: D19.5*d7*20
The above specifications are for reference only, if you do not have the specifications you want, please contact customer service for consultation and accept customization.
At present, our company has a large number of ferrite multi-pole magnetic rings, bonded neodymium magnet molds, and can also be opened for mold production. The products are widely used in sensors, washing machine dishwasher drainage pumps, spray pumps, aquarium equipment submersible pumps, Foot bath circulating pump, stepper motor, brushless DC motor, electronic instrument, etc., optical optoelectronic industry, welcome to consult.
Associated 4-pole sintered ferrite rotor;
4 Pole Water Meter Water Flow Meter Ring Ferrite Magnet
This 1mmx1mm miniature circular magnet has a compact size and a surface magnetic field of approximately 2900 Gauss, making it suitable for precision applications with high requirements for magnet size....
This product is a miniature round magnet, made of rare earth NdFeB magnets, belonging to the ultra-small size magnet series, using N35 grade, the specific size is 1.5mm diameter, 1mm thickness, axial magnetization, surface nickel coating, tolerance ±0.05, such as If you are interested in this small magnet product, you can contact us to customize it for you....
Customers from the United States, the United Kingdom, Australia, Japan, Poland and other customers are looking for ferrite cylindrical magnets. Welcome to contact the Courage magnet manufacturer. Our company is located in Dongguan, China. There are many ready-made sizes and low prices. Like the main picture...
The sample is a small-sized Y35 ferrite magnetic block with a specification of 3 × 1.3 × 4mm, magnetized along the length direction, and a surface magnetic field of about 1300 Gauss....
This is a very small rectangular ferrite block magnet, measuring 2.45 mm in length and 1 mm in both width and height. It is magnetised along its length and is barely noticeable when held in the hand....
7.4x6x5mm Ferrite Small Block Magnet Introduction,Material: Hard Ferrite (Ceramic),Shape: Block / Rectangle / Bar,Coating: No Coating,Grade (Chinese Stardard): Y30,Operating temperature: -40°C to 250°C,Delivery time: 7-15 days,Magnetization direction: thickness....
U-shaped neodymium magnets are a type of high-performance permanent magnet material with a structure resembling the letter ‘U’. Manufactured from sintered neodymium-iron-boron, they are characterised by high magnetic energy product....
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...