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N55 rare earth magnets

What are magnets? In common knowledge, they are things that attract objects through a magnetic field, or in other words, a moving electrical charge. We commonly see magnets in compasses, toys, medical equipment, jewelry, and even on the generations-old market of fridge magnets. They have various uses, but they have also been innovating. Nowadays, we have magnets being used in heavy load machinery and motors. Most magnets used in these are called permanent magnets, and in this article, we will specifically discuss a type of permanent magnet called N55 rare-earth magnets.

What are rare earth magnets?

First, let’s dive into what rare-earth magnets are. Rare-earth magnets are permanent magnets made from alloys containing rare earth elements (mostly elements from lanthanide series and alloys). And before any confusion, let’s clarify too what “rare-earth” means in this concept. The phrase “rare-earth metal” can be confusing because some of these metals are as common in the Earth’s crust as tin or lead, but rare-earth ores are irregularly dispersed and do not occur in seams like coal or copper; therefore, they are “rare” in any given cubic kilometer of crust.

Rare-earth magnets are the strongest forms of permanent magnets and were created in the 1970s and 1980s and produce much greater advantages than ordinary magnets. For example, they generate magnetic fields that are much stronger than those produced by alnico and ferrite magnets. Rare earth magnets have fields that exceed 1.4 Tesla, whereas ceramic and ferrite magnets have values that range from 0.5 to 1.0 Tesla. Moreover, all rare-earth magnets have a higher level of heat resistance than ordinary magnets by design. However, certain rare-earth magnets are more heat resistant than others. Other than that, they have a longer functional life. All magnets will lose part of their magnetic strength, but rare-earth magnets, on the other hand, do not suffer from the same age-related loss in magnetic power as other magnets. A normal magnet can lose up to 5% of its strength every 100 years, but rare-earth magnets only lose a fraction. Contrary to popular belief, rare-earth magnets are not very costly. They were rather expensive up until the 1990s.

On the other hand, recent manufacturing breakthroughs have opened the way for shorter and more efficient production cycles. As a result, rare-earth magnets are substantially less expensive now than they were. All these components make up a perfectly effective and efficient tool. But, for this article, we will focus on the strongest, most affordable, and most marketable rare-earth magnet, the Neodymium magnet.

The fourth member of the lanthanide family of rare earth elements is neodymium. According to the periodic chart, it has an atomic number of 60. Neodymium does not naturally exist in metallic form or unmixed with other lanthanides, yet it is unexpectedly the 27th most common element in the Earth’s crust. They are constructed of neodymium, boron, and iron alloy and are the most well-known rare earth magnets. Neodymium is especially antiferromagnetic and demonstrates magnetic properties in its pure form, but only at temperatures lower than 19 K(254.2 °C; 425.5 °F). They are ranked according to the output intensity of magnetic fields, demagnetization resistance, temperature coefficients, and the advised highest working temperature.

On top of these properties, Neodymium magnets are also considered safe. No proof exists that magnets or their qualities are hazardous to people or other living things. There have even been reports of people believing that neodymium magnets benefit health, although there have been no research or theories to back this up. Magnets are safe to use as long as they are handled with care and attention. But, even though the magnets do not have direct detrimental effects on health, they may pose a danger when not handled or cared for properly. Since it was mentioned above, that neodymium magnets are one of the strongest magnets accessible to the market. Knowing the do’s and don’ts of neodymium magnet care and handling is important.

What does “N55” mean?

Now that we know what neodymium magnets are let’s talk about what the alphanumerical term “N55” means. Sintered NdFeB magnets fall under a well-recognized classification system on a global scale. They have values ranging from 28 to 55. N is placed before the values to indicate neodymium, also known as sintered NdFeB magnets. The numbers, on the other hand, represent the maximum energy product of the magnet in terms of Mega-Gauss Oersteds(MGOe). The letters that reflect intrinsic coercivity and maximum operating temperatures are placed after the numbers. These range from the default (up to 80 °C or 176 °F) to TH (230 °C or 446 °F), and they are all positively correlated with the Curie temperature. A greater number would indicate a stronger magnet. However, regardless of grading, all neodymium magnets demonstrate extraordinary magnetism compared to all other types of magnets. Neodymium magnets are incredibly strong due to their high saturation magnetization and resistance to demagnetization. One of the key advantages of the NdFeB magnet is its ability to perform the same job with a smaller magnet than with a larger one. As a result, the overall size of the equipment may be reduced while the cost may also be dropped.

How important are they, and where are they being used?

The market for neodymium was forecast to be worth USD 2.25 billion in 2020, and it is predicted to rise at a compound annual growth rate of 5.3% from 2021 to 2028. Neodymium is one of the most sought-after magnets worldwide as a result. The most typical application is as a permanent magnet. They are mostly used in the manufacturing, electronics, and motor sectors. They are utilized in electronics like hard disk drives, audio and video equipment, computers, and mobile phones. These magnets are also crucial to motors and electric vehicles, including anti-lock brake systems. On-off switches, magnetic separators, filters, generators, and even safety and security systems are made with them in the manufacturing sector.

NdFeB N55 magnets are employed in a variety of sectors. Medicine, biotechnology, electronics, automobiles, military, and space exploration are only a few examples. N55 neodymium magnets are up to 6% more powerful than N52 neodymium magnets. As a result, an N55 magnet has the best size to magnetic power ratio. Because of their exceptional strength in comparison to their size, they are an excellent alternative to bigger Ferrite magnets. As an illustration, a neodymium magnet of grade N55 might be utilized when an incredibly tiny magnet is needed to hold anything to its surface securely. Their adoption has significantly shifted how the worldwide industry market evaluates magnet functioning and size. For example, a basic piece of magnetic jewelry employs a neo to keep the earring in place. Simultaneously, neodymium magnets are sent into orbit to aid in dust collection from Mars’ surface. The dynamic properties of neodymium magnets have even been used in experimental levitation systems. In addition, neodymium magnets are utilized in welding clamps, oil filters, geocaching, mounting tools, costumes, and many more applications.

N55 strong magnets are also useful for holding applications due to their magnetic force. When space is limited, yet a high magnetic force is needed, strong N55 neodymium magnets are frequently employed. Neodymium magnets of the N55 grade can also be applied in sensitive applications like magnetic sensors and switches.

Since N55 grade magnets are still relatively new in the market, there is still much potential for their applications. Currently, N52 neodymium magnets are still more commonly used than N55. This might be because not all magnet manufacturers can manufacture N55 magnets.


Global progression and innovations have led to a great demand for magnets. From being most commonly used in compasses and household items to being a necessary part of heavy-load machineries, magnets became a driving force in global development. Today, N55 neodymium magnets are the strongest available magnets in the market. They have been heavily used as permanent and long-term magnets in different industries. Because of their ability to magnetize heavy items even in small quantities while being moderately priced, N55 neodymium magnets have been sought-after.

With the heavy demand for neodymium magnets, it’s important to identify and find reliable suppliers with proficient knowledge of them. As mentioned above, not all manufacturers can produce N55 magnets. With the strength of these magnets, it is encouraged that suppliers also know how to handle properly and care for neodymium magnets.

ROBO Magnetic provides different kinds of neodymium magnets and can export custom-made ones. They are a leading manufacturer and supplier of neodymium magnets. Know more about them at, or you may contact them at /+86-574-88790219


Article by

ROBO Magnetic Product Team

We are the manufacturer with 16 years of experience in custom neodymium magnets.

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