This is a larger size neodymium arc magnet, the outer diameter size of 120mm, is customized according to customer drawings, N40SH in the “N” on behalf of the magnet is neodymium-iron-boron material, “40” is the magnet's N grade, indicating that the maximum energy product of 40MGOe (mega-gauss osz), “SH” indicates that this magnet has a higher coercive force, and is able to maintain its magnetic properties without demagnetization at 150 ℃. The “SH” indicates that the magnet has a high coercivity and can maintain its magnetic properties without demagnetizing at 150°C.
Large arc segmented magnets are typically used in applications that require a strong and uniform magnetic field, such as electric motors, generators, etc. These magnets can be designed in an arc shape. These magnets can be designed in a curved shape to fit circular or curved structures and may be divided into multiple segments to facilitate mounting or to minimize eddy current effects.
Several common magnetization directions for curved magnets are generally dominated by radial pairing.
You may also want to know;
Influence of the size of arc magnets on motor performance