Sintered Neodymium Magnets also referred to as Neodymium magnets, Neo or NIB magnets (because of their Neodymium, Iron and Boron composition) stand out as the most powerful permanent magnets in the world. Neo magnets belong to the rare earth magnet family. They are relatively new and have only become affordable for daily use recently.
Neodymium magnets are graded depending on the material that makes them i.e. N35, N38, N38SH, N42, etc…As a general rule of thumb, the higher the grade i.e. the number following the letter ‘N’, the stronger the magnet. The strongest Neodymium magnet (or simply the highest grade Neo magnet) available in the market today is the N52. Any letter or letters that follow the grade i.e. SH in N38SH represent the temperature rating of the magnet. In case there’s no letter or letters following the grade, the magnet is said to be a standard temperature neodymium magnet. Neo magnets have standard temperature ratings (no designation). The ratings include; M, H, SH, UH, EH. Please note you can find all the temperature ratings of each Neodymium magnet grade we sell on our Neodymium magnets specifications page.
Composition and Coating
Neodymium magnets are composed mostly of Neodymium as well as Iron and Boron. Since the magnets contain Iron, they are prone to rust. As a result, it’s important to coat Neo magnets to prevent rusting. Coating also helps to strengthen the magnets. There are a number of coating options for Neo magnets. Nickel is however the most popular coating material for Neo magnets. We however go a step further and give our Neo magnets a triple plating with layers of nickel and copper and then we apply a nickel coating again. The triple coating ensures our NIB magnets last longer (are more durable) than most (if not all) Neo magnets out there in the market today. It’s important to note that most Neo magnets on sale today are single plated. Our Neo magnets are therefore the best in regards to durability. It’s also worth noting that we offer numerous coating options apart from nickel coating. For instance, you can request for a zinc, copper, tin, epoxy, silver or even a gold coating. Our gold plated NIB magnets are quadruple plated with; nickel, copper, then nickel again before they are given a top gold coating.
1. Higher resistance to demagnetization: NIB magnets have a higher demagnetization resistance when compared to many other types of magnets. Although they are sensitive to heat, they don’t become demagnetized easily when they are placed near other magnets or dropped, as is the case with most magnets.
2. Unmatched strength: As mentioned above, Neodymium are the most powerful permanent magnets in the world. The magnets are ten times stronger than the strongest (ceramic) magnets. If you happen to be using ceramic magnets currently in your project, you can (should) replace them with smaller Neo magnets for a much stronger holding force. Feel free to check out our Magnet summary page to get an idea of the strength of each of our Neo magnets.
Our Magnet summary page also shows other important info such as the surface field of all the magnets we stock. You also get access to an online magnet calculator which can help you estimate the field strength as well as pull force of magnets placed any distance from Neo magnet.
3. Reasonable cost: Our Neodymium magnets are reasonably priced when you consider their amazing properties i.e. superior magnetic properties and higher resistance to demagnetization.
4. Numerous applications: Neodymium magnets have extensive applications in many industries/fields such as computer devices, motors, communication tools, medical treatment instruments, speakers, sensors etc.
1. Neodymium is a brittle material: Neodymium magnets are prone to chips and cracks. We solve this problem by coating the magnets.
2. NIB magnets are also prone to rust. Coating also helps in this case.
3. Machining Neodymium magnets generates heat which is capable of demagnetizing the magnets or igniting the material which is highly toxic when burned. It’s therefore important to control the heat the magnet is exposed to in any application involving NIB magnets or avoid machining at all. NIB magnets start losing their strength when they are exposed to heat exceeding 80C or 176F (for standard N-grades). They become completely demagnetized at temperatures above 310C or 590F (for standard N-grades).