As the second generation of rare earth permanent magnet, Samarium Cobalt magnet is mainly composed of Samarium, Cobalt, and Iron. Samarium Cobalt magnet can be classified to 1:5 type and 2:17 type according to the composition. SmCo block magnet is also measured by length (L), width (W), and thickness (T), where the last dimension indicates the magnetization direction. SmCo block magnet has excellent resistance to corrosion, oxidation, high temperature, and demagnetization in comparison with other permanent magnet material, especially sintered Neodymium magnet. It still widely uses in aerospace, automotive, and military applications.
SmCo Block Magnet Calculator
Notes:
- This calculator adapts to non-coating and non-chamfer magnet.
- Gauss value is based on Biot-Savart law and applicable to calculate gauss value of pole face’s geometric center.
- Surface gauss value decreased as the air gap increased, therefore, both encapsulation of hall component and neglected air gap have the significant role on the accuracy of gauss value. We recommend users set the air gap between 0.3 and 0.5mm.
- Measurement repeatability of surface gauss is relatively low even testing point is the geometric center. It must be pointed that surface gauss cannot represent the overall magnetic performance of the magnet in comparison with magnetic flux or magnetic moment.
- Air gap between magnet and steel plate in calculator is 0mm. In reality, even very small air gap will generate dramatic influence on the pull force in both theoretical calculations and the actual measurement.
- Besides magnet’s material, grade, and dimension, pull force is also impacted by steel plate’s material, composition, and surface condition. Steel plate should be thick enough to carry all magnetic flux or result in the low pull force owing to magnetic saturation.
- Above calculation results are only for reference.
