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Neodymium DISC Magnets
Neodymium Disc Magnets
Strong Neodymium Disc Magnets at CMS Magnetics & Magnets For Sale carry wide Variety of Neodymium disc Magnets of Grade N35,N36,N42,N45, 50 & N52 Neodymium disc Magnets Order Online or Over the Phone. Cylindrical magnets & Countersunk Disc magnets can be found here at Magnets For Sale.
Here at CMS Magnetics & Magnets For Sale we carry Strong neodymium disc magnets with epoxy coatings and with a countersunk hole already drilled in the middle to attach it to nonmetallic materials such as wood or plastic. These neodymium disc magnets even allow the screw’s head to reside below or even with the face of the disc magnet 
toensure it does not interfere with the magnet’s function.
See Our Pinterest Page For Some Great Project Ideas With Disc Magnets
See Our Pinterest Page For Some Great Project Ideas
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Adhesive disc magnets By adding the 3m adhesive to the magnet you just created a magnet that will join with a not magnetic surface such as wood, glass or plastic
Our countersunk neodymium discs perform the same function in they may be attached to the same types of materials as the adhesive disc magnets ut they use screws to hold them in place. The countersunk part of this magnet means that the screw head will end up flush with the surface of the disc magnet. This countersunk magnet design works beautifully with wood screws.
Next is the disc magnet variation with an epoxy coating that protects the magnet from scratching and protects the magnet even more so from weathering.
Lastly we have our plastic encased neodymium disc magnets. This plastic coating protects the magnet to a greater extent than the epoxy and makes it almost indestructible. The plastic coating on these magnetic wonders helps prevent scratching of your refrigerator, weather will not bother it. Dropping them will not break them.
What if you had a plastic covered neodymium disc magnet with adhesive or countersunk screw holes? Wow, now you have something!
This is where the information gets a little deeper
The term “Permanent Magnets” really just refers to magnets that cannot be turned off like an electromagnet and will hold their magnetism indefinitely as long as certain conditions are met. Refrigerator magnets, magnetic jewelry & most office magnets are some examples of permanent magnets that you can find all around you. All magnets on this site are Permanent magnets. All permanent magnets can be classified into two main types, which are also known as families. The 2 types of families of permanent magnets that can be found are rare earth magnets and non-Rare earth magnets. The two magnetic materials that fall under the Rare earth magnet label Neodymium and Samarium Cobalt.
NdFeB magnets are made of an alloy of three elements, NdFeB (Neodymium, Iron, and Boron), that when joined together create super strong neodymium magnets. Many people use the term “rare earth magnet” and “neodymium magnet” interchangeably because neodymium magnets are the most popular and well-known of the rare earth group. Other common names for neodymium magnets include neo magnets, or NIB Magnets.
Due to their high strength and low cost, neodymium magnets revolutionized magnetic products. These magnets are the strongest developed thus far. Because neodymium magnets are between seven and fourteen times stronger than ceramic magnets, they are sometimes called super strong or powerful magnets. CMS magnetics sells the strongest neodymium rare earth permanent magnets on the market on Magnet4Sale.com with grades ranging from N35 to N52. Grade N52 neodymium disc magnets are the most powerful magnets so far and a grade N52 magnet measuring only ½” can have a pull force of 32 lbs! Our shop carries a variety of these powerful magnets for sale in different shapes, sizes, and grades to fit many different applications.
At Magnet4Sale.com & Magnets For Sale, we also sell custom neodymium magnets and custom magnetic assemblies so we can help you find the best fit for your project specifications.
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Our rare earth magnets have a high saturation magnetization & tetragonal crystalline structure ensuring top physical pulling force & maximum energy product from these strong magnets . These hold very well against steel surfaces with direct touch and direct pull. The magnetic strength will last forever under normal use.
Many Uses & Users
Cms magnetics’ super strong neodymium magnets for sale are used by school teachers machinists magicians engineering and manufacturing students hobbyists inventors technicians diyers mars rovers (yup up there) craft magnets uses hobbies therapy storage experiments science fairs magnetic bars labs garages schools offices refrigerator magnets & as a strong earth magnet
These powerful magnets neodymium are comprised of strong neodymium material makes them the strongest magnets of their size commercially available. They are axially magnetized so the north and south poles are on the flat surfaces, and the red line on one side of the magnet denotes which side the north pole is on. Neodymium magnets are strong magnets & are unique because of their extreme resistance to demagnetization and will only lose their magnetism if they're heated above 176 degrees Fahrenheit.
Neodymium magnets (also known as NdFeB) is the type of permanent magnet most widely used in various industrial and household products due to its (1) large magnetic strength, (2) high resistance to demagnetization, and (3) relatively cheap price. Though it is discovered in 1984, later than most of other types of permanent magnets, neodymium magnet is replacing alnico and ceramic magnets in many applications.
Neodymium is a rare earth metal and neodymium magnet is an alloy composed of neodymium, iron and boron atoms that are organized in a microcrystalline structure with a chemical formula of Nd2Fe14B. Because of the low temperature (-254.2/-425.5 ºC/ºF) at which the ferromagnetism of neodymium metal disappears (or called Curie temperature), a certain amount of iron is present in neodymium magnet in order to increase the Curie temperature well above room temperature.
During manufacturing and under an external magnetic field, the spin of 4 unpaired electrons in neodymium atoms (compared 3 in iron) can align along the same direction giving rise to a strong magnet with a magnetic energy 18 times larger than traditional ferrite magnets. The difficulty of its reorientation of magnetization leads to a high level of resistance to being demagnetized. The boron atoms in neodymium magnets do not contribute directly to the magnetism, but improve cohesion by strong covalent bonding. The relatively low content of rare earth (12% by volume) in neodymium magnets lower their price compared with other rare earth magnets like samarium-cobalt magnets.
Our company (CMS & Magnets For Sale) is among leading magnetic product suppliers carrying a wide variety (size, shape, grade, assembly) of high-quality neodymium magnetic products. They are protected by triple layers of nickel-copper-nickel.
Properties
Demagnetization
Demagnetization can occur
(1) in the presence of an external magnetic field (e.g. in the vicinity of a motor)
Depending on the strength of the demagnetizing field, the magnetic flux of the Neodymium magnet may remain the same or loss partially, and this process can be reversible or irreversible. When the demagnetizing field exceeds a critical value, the magnet's coercivity, the Neodymium magnet will be demagnetized and re-magnetized depending on the magnetic direction of the external field.
(2) by increasing temperature.
when temperature is raised, thermal (random) motion exerts more force to re-orientate the initially aligned (domain atoms) spins causing demagnetization of the Neo magnet. This demagnetization can be permanently or temporary depending on the level of the elevated temperature. The ability of an neodymium magnet to resist demagnetization by increasing temperature is measured by two parameters, the magnet's maximum operating temperature (MaxOpTemp) and Curie temperature as shown by the table below for different grades of Neodymium magnets. For a standard N grade of Neodymium magnets, their magnetic flux will permanently loss a fraction of the strength at their maximum operating temperature and loss all of their magnetic strength at their Curie temperature. For example, most Neodymium magnets start to loss their magnetization above 80/176 ºC/ºF. Special grades of Neodymium magnets with a higher Curie temperature (up to 220/428 ºC/ºF) have been developed to work at a high temperature such as in windmills, hybrid motors, etc. Thus, in choosing neodymium magnets it is imperative to consider which grade of Neodymium magnets is best suited to your needs in terms of the operating temperature setting.
grades
Neodymium magnets are graded in terms of (1) their strength of magnetic field as measured by the remanence (Br) or the energy product (BHmax) and their resistance to being demagnetized by temperature changes as measured by the maximum operating temperature or the Curie temperature (cf. table below). Some grades of neodymium magnets are designated as
N35-N55
N33M-N48M
N30H-N45H
N30SH-N42SH
N30UH-N35UH
N28EH-N35EH
where the two digit numeric value in the unit of MGOe indicates the strength of the magnet (the higher the number the stronger the magnet) and the last one or two letters indicates the temperature sensitivity as described in the table below.
Corrosion
Neodymium magnets are manufactured in the form of powered porous metal in which the irons are more easily subjected to oxidation or rust, especially under humid conditions, though recently certain grades of Neodymium magnets have been made that exhibit higher resistance to oxidation. Corrosion can be at least partly prevented by applying a suitable coating or plating. Neodymium Magnets can be coated by many different materials including nickel, copper, zinc, tin, epoxy, silver and gold, though nickel is the most commonly used one and a multi-layer coating method (e.g. nickel-copper-nickel) is also usually applied to make the product more resistant to corrosion. The performance of a coating or plating could be evaluated with a Salt Spray/Salt Fog Test (SST) and this is executed in accordance with ASTM B117.
Mechanical stress and handling care
Neodymium magnets are made of powered porous metal and thereby inherently bristle and prone to chipping and breaking when handled inappropriately. Neodymium magnets are also very strong magnets. Thus appropriate handling and packing are required to ensure safety and prevent damage. It is advised not to (1) machine the magnets, which could also generate heat and demagnetizing the magnets, (2) put magnets in conditions of mechanical stress e.g. in load bearing situations, and (3) place any body part (e.g. hand) between attracting magnets or between a magnet and a ferrous metal.
Neodymium powder is very fine and when dry can ignite spontaneously. Thus, care must be taken in handling neodymium powder.
Applications
Popular uses
Neodymium magnets are now widely used in various industrial and commercial products. They have replaced other types of magnets in many applications that require strong permanent magnets including but not limited to:
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Electric motors (e.g. powerless tools, hybrid/electric vehicles)
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Computer and cellphone accessary (e.g. hard disks, loudspeakers, headphones)
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Office supplies (e.g. message boards, name badges, business cards)
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Small household items (e.g. hooks, toys, crafts. jewelries)
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Green energy devices (e.g. wind turbines, rechargeable batteries and biofuel catalysts)
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Magnetic therapy (e.g. magnetic therapy bracelets, necklaces, beddings)
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Scientific instruments (e.g. NMR spectrometers and MRIs)
Here is a list of major different applications
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Medical equipment
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Aerospace
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Consumer electronics
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Home applications
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Industrial applications
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Wind turbines
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Automotive
New trends
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Neodymium is right now responsible for most of the growth in rare earth demand with the Neodymium magnetic market worth $11 billion in 2017 according to market research group IMARC. With rapid development of electric vehicles and other renewable energy applications in the next couple of decades, this demand for Neodymium magnets will suely surge (e.g. Tesla has recently used motors with Neodymium magnets in its Tesla Model 3).
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Because of the strong and/or homogenous magnetic field Neodymium magnets can generate, they have found new applications in some medical fields such as magnetic resonance imaging and magnetic therapy. Neodymium magnets are also used as a surgically implanted anti-reflux system (GERD) around the lower esophageal sphincter to treat GERD disease.
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The N52 grade of Neodymium magnets is an emerging market, and with the very strong magnetic force, it has been finding new applications that require small-sized and/or light-weighted magnets (e.g. sensors for medical diagnosis). Our company offers a huge selection of shapes and sizes of N52 Neodymium magnets and the list is growing! More recently, the strongest neodymium magnets, N55 magnets, are developed for commercial uses, which are ideal for fine and delicate work where small size really matters.
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Neodymium magnets having many combinations of partial alloying substitutions for Nd and Fe are being invented, leading to a wide range of available properties and opening up new application avenues.
The Right Magnet For Your Project
The Right Magnet For Your Project
CMS Magnetics is an established supplier of premium quality super strong neodymium magnets that are used in some of the most demanding and critical applications such as aviation, automation, and manufacturing systems that help shape the world around you. Because we strive to only supply the highest quality super strong neodymium magnets, our super strong neodymium magnets are all produced in state of the art facilities that ensure a high standard of both quality and performance are met.
Besides neodymium super strong neodymium magnets which are renowned for their strength and versatility, we also carry many different kinds of super strong magnets neodymium that are all suited for different needs. From ultra high temperature resistant Samarium-Cobalt magnets to cost-effective and ubiquitous ceramic magnets, CMS Magnetics is a trusted and reliable supplier of ultra high performance super strong neodymium magnets in an assortment of all grades and sizes. CMS Magnetics is both the manufacturer and the supplier of these magnetic devices. You will also find listings by CMS on Amazon for:
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Magnetic Tools
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Ceramic Magnets
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Alnico Magnets
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Bar Magnets
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Square Magnets
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Fishing Magnets
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Toy Magnets
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Magnetic Assemblies
Additional Information
Neodymium super strong neodymium Magnets come in all sorts of sizes strengths and magnet grades are used to identify the strength of a magnet. Grades range from N35, the cheapest and weakest, to N52, for top power
We have a fast moving inventory right here in Texas and more coming in from our manufacturers everyday. What this means is if you order 5 magnets to see if they will work in your large project and they do work, you can get 500 or 1000 or 10000 more the next day.