Radial (diameter) magnetized ring neodymium magnets are also more common, which is characterized by the fact that its magnetic field is distributed along the radial direction of its cross-section, and the magnetism is stronger on the radial direction (side) of the magnet, this kind of magnetized ring magnet is usually used in the occasions that need to generate magnetic field in the radial direction, for example, it plays a key role in the equipment such as sensors, motors and generators.
The diameter magnetized 18mm ring neodymium magnet can be machined according to your actual size and grade.
Relevant radially magnetized neodymium magnet ring sample;
Radially magnetized sintered neodymium magnetic ring 30x20x2mm
Radially magnetized hollow cylindrical magnet ring 9.9 x 2.5 x 10 mm