Neodímio ímãs de anel são como discos ou cilindros, mas com um orifício central. Most neodymium ring magnets and tube-shaped magnets are axially magnetised: pólos norte e sul estão localizados nas superfícies circulares planas (“cabeçalho e rodapé”). The few diametralmente magnetizado neodymium ring magnets with poles “esquerda e direita” estão especificamente marcado.

Due to their shape, it is very tempting to screw-mount ring magnets. But please keep in mind, the material is very brittle and chips easily. That is why we advise against the screw-mounting of ring magnets with holes. It is much safer and easier if you use screw-on magnets ou countersunk pot magnets.