This is an arc-shaped ferrite magnet for small, low-power micro motors, with an outer radius of 17.35mm, an inner radius of 12.15mm, a shaft length of 32mm, and a thickness of 5.2mm. It has low magnetic properties and magnetic energy product, but has good corrosion resistance and low hysteresis loss. In addition to using ferrite arc magnets, micro motors also use rare earth neodymium arc magnets, making it more suitable for micro motor applications that require high torque and efficiency.
Schematic diagram of common magnetization direction of arc magnet; 【NS pairing】