FaQ about Magnets and Services
This is a tough question, since the determining factor is the intended role of the magnet. Ferrite magnets, although weaker, are surely cheaper, while neodymium magnets are stronger and therefore more expensive.
The best practice is to slide one over the other; we advise against trying to pull them apart vertically, since you may hurt yourself or damage the magnets.
We advise against such practice, since the Neodymium would make the Ferrite lose his magnetization, therefore becoming useless.
You can successfully use magnets on non-ferrous materials with the help of bioadhesive tape, glue or screws. You just put one magnet in place and use another of opposite polarity to make them safely stick together.
Humidity, electric discharges and high temperatures (always follow our guidelines) are all factors that can make magnets lose their magnetism, so be aware.
All these acronyms indicate the maximum temperature a magnet can withstand before permanently losing some of its magnetization. One of these letters can be placed after the grade of the magnet to indicate its resistance to demagnetization. An example for a magnet with an “M” resistance is N35M, generally means that a magnet can be used in an operating environment up to 100°C. An “H” magnet performs ok up to 120C, “SH” up to 150C, “UH” up to 180C, “EH” up to 200C, and a “TH” up to 220C. These are general specifications and other factors do play a role in coercivity decisions. 80 degrees Celsius is the standard limit (no acronym in the product page), but on request we are also able to produce magnets with higher heat resistance.
Yes they are. We always provide our customers with half and half polarities to guarantee that, no matter the final usage, the magnets can be made to stick together or against a metal surface without issues!
Neodymium magnets rust easily, therefore it is very risky to use them in humid environments if not adequately protected. The solution to this problem is to use plastic-encased magnets or resin-coated pot magnets. On the other end Ferrite Magnets are very resistant to corrosion, oxidation and humidity.
Among our coatings you can choose between zinc, nickel, gold, and black epoxy.
If the magnet has to come in contact with the skin, you would want to opt for a zinc-coated one. This guarantees that the magnet is nickel-free. Otherwise, the differences between the two coatings are just minor and cosmetic, the nickel being shinier and smoother.
Gold and black epoxy coatings offer a different color than the standard gray, but do not improve the grade of protection.
A marked magnet has a red or black dot on the relevant pole. This way the client knows the correct polarity and it becomes easier to assemble the magnets together (north against south).
Axial magnetization means that the disc or ring is magnetized through its depth or height, and the poles are located on the flat surface. Diametrically magnetized means that the magnetic axis runs through the diameter, and the poles are located opposite along the lateral surface. Example of axial magnetized magnet:
Ferrite magnets are made of two different iron alloys: with strontium or with barium.
It is a common misconception that ferrite magnets are cheaper than neodymium ones.
Having less adhesive force, in order to reach the same one as a neodymium magnet the ferrite magnet will have to be quite bigger, raising its cost.
Plastoferrite is a type of magnetized rubber band made of 90% barium- or strontium-ferrite and 10% of thermoplastic components.