Neodymium Magnets

Neodymium magnets (NdFeB) are rare-earth magnets and are among the strongest permanent magnets in widespread use. Made from an alloy of neodymium, iron and boron, they deliver high magnetic performance in a compact size. This is particularly useful in technical applications where strong holding force, precise positioning or reliable attachment is required in limited space.

• Designations such as N35, N42 and N52 indicate the magnetic material grade. As a general rule, a higher number means higher magnetic performance. The letters M, H, SH and UH indicate temperature resistance classes.

• Typical operating temperatures vary by grade. Standard N grades are generally suitable for use up to 80 °C, while special grades can withstand higher temperatures. For technical applications, selecting the right grade is therefore just as important as choosing the shape and size.

• Neodymium magnets contain iron and are prone to corrosion without a protective coating. Nickel plating and multilayer Ni-Cu-Ni coatings are commonly used to reduce this risk.

• The material is hard but brittle, so impacts can cause chipping or breakage. Machining is generally not recommended because heat can cause a partial loss of magnetic strength.

• A wide range of shapes and sizes is available for holding, closing, assembly, sensing and positioning applications, as well as other uses requiring a strong magnetic effect in a compact design.

For more information on neodymium magnet materials, grades and practical applications, read our articles on neodymium magnets or contact us.