Specifications N40, N42, N45M etc.
Specifications N40, N42, N45M, N52 etc. denote the quality of the magnetic material. From this designation, you can read two pieces of information:
- How much "magnetic energy" is contained in the magnetic material
- What is the maximum operating temperature of the magnet
The number (e.g. 40, 42, 45) is approximately identical to the maximum energy product of the magnet (in MGOe).
The letters N, M, H, SH, UH, EH or AH indicate the maximum operating temperature, which can be 80, 100, 120, 150, 200 or 240 °C. Most of our magnets start with the letter "N". These magnets should be used up to a temperature of 80 °C.
If we speak colloquially about the "strength" of a magnet, we usually mean the pull-off force from a steel plate or the attractive force to a piece of iron (or another magnet) at a certain distance.
The strength is not dependent solely on the magnetic material used. The following factors are very important:
- Volume of the magnet
- Shape of the magnet
- Magnet Proportion (e.g. the ratio of radius to height for cylindrical magnets)
- Combination with other materials, e.g. if the magnet is placed in a steel cylinder, or if it is only a raw magnet
