NdFeB Annular Magnet

BMAG NdFeB Annular Magnets are the preferred choice for engineers seeking a high-performance radial or axial flux source. The term “annular” denotes a ring with a specific, optimized ratio between the wall thickness and the overall diameter. This ratio is critical for maintaining a high “Permeance Coefficient,” which prevents the magnet from working against itself. BMAG NdFeB annular magnets provide a clean, predictable field that is essential for precision calibration.

Because NdFeB contains high amounts of iron, protection is paramount. BMAG annular magnets feature advanced coating technology, including PTFE for specialized low-friction applications. The interior and exterior surfaces are treated to ensure that there are no “burrs” or uneven plating deposits that could interfere with tight-tolerance assemblies. We use laser-monitored grinding to ensure that the annular ring is perfectly balanced, reducing vibration in rotating applications and ensuring that the magnetic field is perfectly centered.

NdFeB Annular Magnet Dimension Diagram

Ring Magnet Magnetization Direction