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- N48, N50 & N52 Neodymium Magnets
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- N35 Neodymium Magnets
DISC Neodymium 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
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A great Quick education in how to select your Disc Magnets
How to select the proper Strength Disc Magnets magnets for your project in 13 sentences
The truth about magnets
At CMS Magnetics & Magnets For Sale we sell magnets to the hobbyist and to industry with no minimum purchase. We get them to you FAST. CMS Magnetics & Magnets For Sale is rated A+ by the BBB. Our Customer Service people will help you over the phone if you have only a small idea what you need and gladly take your order right there over the phone. They do not work on commission, they really like to help people get it right and are some really nice people. Really! Or you can order on the website.
A larger magnet of the same material and grade (think strength) will be stronger.
In order of strength the strongest magnetic material first: Neodymium, Samarium Cobalt, Ceramic, AlNiCo.
Ceramic magnets are the household magnets or the ones you probably played with as a child.
If you have 2 magnets that are attracted to each other (stuck together) and you didn’t say “wow how am I ever going to get these separated?” They were not Neodymium. We can show you how to separate them.
The least strong grade of strong neodymium (N32) is much stronger than the strongest ceramic magnets.
Even Strong Neodymium magnets lose all of their magnetic strength at about 175o Fahrenheit.
Neodymium magnets corrode in the weather. 6 months in the elements and it is a mess.
Samarium Cobalt (SmCo) is a little more expensive and a little less strong but is a great substitute in the above conditions (#6 & #7).
Do not let your children under about the age of 10 play with the super strong Neodymium magnets larger than 1 “ in diameter. They will get pinched. If they play with 2 magnets much larger than that they may get a finger broken. When I started working at CMS I almost got my finger broken by 2 21/2 “ magnets slamming together with my finger between them. Do not place these magnets into orifices of the body. Swallowing 2 small neodymium magnets will cause them to attract to each other along the digestive tract very possibly pinching inner linings and may puncture stomach or intestinal linings (NO JOKE HERE!)
Most small scale hobbies will do OK with Ceramic magnets however, a refrigerator magnet or tea towel with a small neodymium magnet in it will NOT slide down the refrigerator.
It is not advised that you make a kitchen knife Holder using a ceramic magnet, eventually someone will get hurt. Use Neodymium.
All magnets are somewhat brittle. Treat a 1/8th in thick neodymium disc like fine china and it will last a lifetime. A neodymium Disc ½ inch thick is much stronger and the light hand is really not needed but it may still chip.
Some Safety Considerations with your Strong Neodymium disc magnets
1 Children should not be allowed to handle Strong neodymium magnets. Small magnets are a choking hazard and should never be swallowed or inserted into any part of the body.
2Individuals with pacemakers should not handle strong rare-earth magnets . Magnetic fields can affect the operation of these devices.
3 The Rare-Earth Magnetics Association is not aware of any positive or negative health effects from handling rare-earth magnets. CMS Magnetics & Magnets For Sale recommends however that pregnant women not handle very strong rare-earth magnets.
4 The strong magnetic fields of neodymium magnets can damage items such as television, computer monitors, credit cards, bank cards, computers, diskettes and other data carriers, video tapes, mechanical watches, & hearing aids.
5 When handling magnets Rare-Earth magnetic products are very powerful and can accelerate a great speeds toward each other and ferrous material. You should always wear gloves and eye protection when handling strong rare-earth magnets.
6 You should avoid having constant contact with magnets of any size and keep a distance of at least 3 feet to large magnets.
7 Under no circumstances should you try to machine Neodymium magnets! These rare earth magnets will crack, shatter and create a flammable toxic dust.
8 Neodymium magnets will lose their magnetic properties if heated above (150 C).
9 All of magnets are plated with a thin layer of nickel, nickel-copper-nickel or gold. This layer (in particular gold) can wear down in the normal use of the magnet over time.
10 Any tool or toy, neodymium magnets can be fun and useful, but must always be treated with care.
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.
CUSTOM NEODYMIUM MAGNETS
Physical properties of Sintered NdFeB Rare Earth Permanent Magnets
Remanence temperature coefficient-0.11%/CTemperature coefficient of coercive force correction-0.60%/C
Vickers hardness600Hvflexural strength25kg/mm
tensile strength8.0Kg/mm2coefficient of thermal expansion4X10 -6/C
specific heat0.12Kcal/Kgthermal conductivity7.7kcal/[m.h.C]
transverse deformation coefficient0.24compression ratio9.8x10-12m2/N
Curie temperature310-340 ?temperature80-200
This is a rare earth super strong neodymium magnets and is made for holding stuff & that is what They do they do best!
Maximum Working Temperature 176 F (80 C)
Material: Sintered Ndfeb Neodymium strong magnets
Pole Orientation: Axially Magnetized, The Poles Are On The Two Flat Sides
Coating: ni+Cu+Ni 3 Layer Plated
Tolerance: All The Dimensions Are +/-0.002in With Coating
These are not the super strong neodymium magnets you played with as children 15-20 times the force of those old time super strong neodymium magnets. Never experienced Super powerful magnets neodymium? Now is the time! 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 magnet (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.
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.
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
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.
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.
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:
Electric motors (e.g. powerless tools, hybrid/electric vehicles)
Computer and cellphone accessary (e.g. hard disks, loudspeakers, headphones)
Office supplies (e.g. message boards, name badges, business cards)
Small household items (e.g. hooks, toys, crafts. jewelries)
Green energy devices (e.g. wind turbines, rechargeable batteries and biofuel catalysts)
Magnetic therapy (e.g. magnetic therapy bracelets, necklaces, beddings)
Scientific instruments (e.g. NMR spectrometers and MRIs)
Here is a list of major different applications
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).
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.
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.
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:
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.