How to Read a Neodymium Grade: What N42SH Tells You, and What It Doesn't
A grade such as N42SH has two parts, and each answers a different question. The number is the nominal maximum energy product, (BH)max, in MGOe.
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Technical articles on magnet grades, coatings, safety and real-world applications. Click a title to read the full article.
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China's Rare Earth Export Rules: What Magnet Buyers Should Plan For
Since April 2025, China has required export licences for seven medium and heavy rare earth elements (samarium, gadolinium, terbium, dysprosium, lutetium, scandium and yttrium), and for magnets that depend on them.
Read the article →Heavy Rare Earths in Magnets: Where Dysprosium and Terbium Matter, and Where They Don't
Dysprosium and terbium are added to neodymium magnets for one reason: to raise their resistance to demagnetization so they keep working when hot or when a strong opposing field is present.
Read the article →When Ferrite Is the Smarter Choice in a Rare-Earth Squeeze
Ferrite (ceramic) magnets are made from iron oxide with strontium or barium. They contain no rare earths, so they are not affected by rare earth export rules or by the price swings of neodymium, dysprosium and terbium.
Read the article →Which Magnet Material for Which Temperature: A Practical Guide
Temperature is usually the first filter when choosing between the four common permanent magnet materials, because they differ in heat behaviour far more than in almost anything else.
Read the article →Why Magnets Lose Strength, and What You Can Do About It
A properly made permanent magnet does not wear out by itself. When one loses strength, something in its surroundings caused it, and in most cases the cause is on a short list.
Read the article →What to Send With Your Enquiry to Get an Accurate Magnet Quote Quickly
Most of the delay in magnet quotes comes from missing details, not from pricing. A short, complete enquiry usually saves a round or two of questions. This is the checklist we work from.
Read the article →Why the Pull Force on the Datasheet Is Not the Force You Actually Get
A pull force figure on a magnet datasheet is measured under ideal laboratory conditions: the magnet sits in direct contact with a thick, flat, clean steel plate and is pulled straight away from it.
Read the article →Axial, Diametral, Radial, Multipole: Why Magnetization Direction Must Be Decided Before Production
Two magnets with identical dimensions and identical grade can behave in completely different ways depending on the direction in which they are magnetized.
Read the article →Sintered or Bonded? Choosing the Manufacturing Route for Your Magnet
Neodymium magnets are made in two broad ways, and the choice changes strength, shape freedom, tolerance and cost. It is worth settling early, because the two routes lead to genuinely different parts.
Read the article →Why Strong Magnets Can't Just Be Dropped in a Box and Shipped by Air
Magnets are one of the few everyday industrial products that air carriers treat as potential dangerous goods — not because of what they are made of, but because of what their magnetic field can do to an aircraft in flight.
Read the article →Why Turkey Is the Second Source Your Magnet Supply Chain Is Missing
Most industrial buyers of neodymium and ferrite magnets are single-sourced from one country, usually without having decided that on purpose — it is simply where the first quote came from, and the relationship held.
Read the article →Choosing the Right Neodymium Grade for High-Temperature Motors
Neodymium magnets are graded not only by strength (N35 up to N52) but also by how much heat they can tolerate before losing magnetism. For motor applications, temperature class is often the deciding factor — not raw pull force.
Read the article →Coated vs. Uncoated Neodymium Magnets: What Actually Matters
Neodymium (NdFeB) magnets corrode quickly if left bare, because the iron content reacts with moisture in the air. In almost all commercial and industrial applications, some form of coating is required.
Read the article →Handling and Storing Strong Magnets Safely
High-grade neodymium magnets, even in relatively small sizes, can generate enough pull force to cause injury or damage if handled carelessly. A few practical rules for warehouse and workshop staff:
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