About These And Other Neodymium Disc Magnets In This Category

Magnets are useful and fun, but can also be dangerous if they aren't handled properly. Little magnets should always be kept away from small children and pets, as they can cause serious harm if they're swallowed. Very strong magnets, like neodymium magnets, can pull together with an extremely substantial force, pinching your fingers if they're caught in between. You always need to keep magnets away from digital devices, such as computers and mobile phones, and away from credit cards (or any other card with a magnetic strip). This is because the information on such devices can be stored using magnetic recording, and may be erased when it comes close to a strong magnetic field. If you're performing a CMS Magnetics project involving magnets, make sure you read the safety precautions for this particular project prior to starting.

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What Is In This Category:

• Over 400 Neodymium Disc Magnet products listed
• Temp range Is Grade Specific
• Rare Earth - YES
• Disc magnets in Grades N35, N42, N45, N50 & N52
• Neodymium disc magnets with Diameters 1/8” - More than 3 “
• Gauss 12,100 - 14,800
• 3 Layer Coatings, Epoxy & Plastic coated too on These Disc Magnets!
• Countersunk Neodymium Disc Magnets
• Pull Forces .36 - more than 600LBS

What we here at CMS Magnetics concerning how clients select a magnets are by shape (1st) by style (2nd) by how powerful the magnet is (3nd)

Since you are already here I will assume that you are looking for a disc shaped magnet. You probably have an idea how big it needs to be. Let us move onto style.

A below is a bare neodymium disc magnet. The Magnet has a 3 layer coating of nickel- copper -nickel for the magnets protection of the magnet itself.

B is a neodymium disc magnet with a coating of epoxy which is a little tougher for protection of the magnet too.

C is a neodymium disc magnet with a screw hole in it. The hole is countersunk & allows the head of the screw to sink with the head flush even with the surface. This is a very useful feature in that it allows you to fasten a magnet to a non magnetic material such as wood or plastic

D Allows for the mounting of a magnet to non magnetic materials that you may not want to put a screw into.

E is a disc magnet typically used for lifting or magnet fishing. It is a neodymium disc magnet with a steel casing and a hook or loop to attach a rope to. The casing focuses the magnet’s collective power in one direction placing all of its strength in 1 direction instead of 4.

              A                               B                                    C                                D                               E

For more information about Neodymium and the magnets that are produced from it written to your level of expertise press the link

Newbie / hobbyist / DIYer  (Written for those with little or no magnet knowledge) 

Rare earth element (REE) established Nd-Fe-B and Sm-Co permanent magnets are widely used due to their excellent magnetic properties. An electric car like GM''s Chevrolet Volt utilizes seven pounds of rare-earth magnets, while every clean-energy wind turbine uses over 600 pounds of neodymium (Nd). China accounts for 97 percent of international REE manufacturing. This monopoly produces a strategic vulnerability for the United States and undermines our national security, competitiveness in the defense both the and clean-energy sectors. Rare earth shortages also can cause significant supply-chain issues for U.S. green energy and technology companies. In an ordinary neodymium-iron-boron (Nd-Fe-B) magnet production center, about 20-30 percent of those magnets are wasted as scrap, which is an estimated 1,500-2,500 tons/year. In the event of Sm-Co magnets, about 15-30 percent of these raw materials are wasted as crap in a normal Sm-Co manufacturing site. Hence, the recycling of infrequent earth-based magnets has gained increasing attention and significance from the permanent magnet industry. Up to now, only very little amounts of REEs (estimated at 1%) have been recycled out of pre-consumer magnet scrap. The objective of the project is to create a scalable, efficient and low-cost manufacturing method to recycle infrequent earth-based magnets from industrial scrap into precious magnetic alloys and high-performance magnets with tailored properties for certain applications.

Neodymium is part of the rare earth family of elements listed on the periodic table of the elements. Neodymium creates awesomely powerful magnets. Samarium Cobalt is the other material that is part of the rare earth family from which rare earth magnets are manufactured.

Neodymium was discovered

Rare Earth, a term for 16 separate elements found intermingled in the earth 2 of which are used to make very strong magnets. These elements are mined in China for the most part but the US, Brazil, Australia and other countries do have significant deposits. These elements were discovered in the mid 1800s & more and more uses for these amazing elements have been discovered since.

Rare earth is a term coined for this collection of elements very soon after their discovery because they were actually thought to be scarce. As it turns out these elements are not rare at all but are just slightly less abundant than silicone, or sand.

The separation & segregation or these elements as well as the creation of an alloy that is part neodymium, part Iron & part Boron (Nd Fe B). NdFeB are the chemical symbols for Neodymium, Iron & Boron in that order.

Neodymium is a rare earth element but Neodymium magnets are an alloy Alloy consisting of the three elements (Nd Fe B) Neodymium, Iron & Boron. A magnet consisting of Neodymium is the most popular perhaps because it is the strongest magnetic material on the face of the planet.

For The Engineer

What Is In This Category ? About Neodymium Disc Magnets for sale from CMS Magnetics.

Over 400 Neodymium Disc Magnet products listed

Temp range Grade Specific

Rare Earth - YES

Disc magnets in Grades N35, N42, N45, N50 & N52

Neodymium disc magnets with Diameters 1/8” - More than 3 “

Gauss 12,100 - 14,800

3 Layer Coatings, Epoxy & Plastic coated too on These Disc Magnets!

Countersunk Neodymium Disc Magnets

Pull Forces .36 - more than 600LBS

Physicist

Here are a few important facts about neodymium.[1-2]

Atomic number: 60

Atomic weight: 144.242

Boiling point: 3347 K (3074°C or 5565°F)

Density (solid): 7.01 grams per cubic centimeter

Electron configuration: [Xe] 4f46s2

Element classification: Metal

Group name: Lanthanide

Group number: none

Melting point: 1298 K (1025°C or 1877ºF)

Period number: 6

Phase at room temperature: Solid

neodymium Nd 60 144.242(3) g

Some Changes to the Atomic Weight of Both Neodymium & Samarium

Changes to the atomic weight of both Neodymium & Samarium Both Recent & Historically (Based on recommendations of the Commission on Isotopic Abundances and Atomic Weights)

Recommended value for the standard atomic weight of neodymium to Ar (Nd) = 144.242(3) based on a new calibrated measurement by Zhao.

Neodymium - Standard atomic weight of neodymium to Ar (Nd) = 144.242(3) This measurement

Is a significant improvement in uncertainty from 0.03 to 0.003. This change was based on a new calibration measurement by Zhao. The change included measurements of samples from China, the United States, and Japan in their study and found no measurable variations.

Historical values of Ar (Nd) include [6]: 1894, 140.5; 1897, 140.80; 1899, 143.6; 1909, 144.3; 1925, 144.27; 1961, 144.24(3); and 1969, 144.24(3).

Samarium - Standard atomic weight of samarium to Ar (Sm) = 150.36(2) based on a new calibrated measurement by Chang et al. [9]. Chang et al. [9] included measurements of five samples from China, the United States, and Japan in their study and found no evidence of measurable variations.

Historical values of Ar (Sm) include [6]: 1894, 150.0; 1897, 150.26; 1900, 150.3; 1903, 150; 1905, 150.3; 1909, 150.4; 1925, 150.43; 1955, 150.30; 1969, 150.4(1); and 1979, 150.36(3).

(Based on recommendations of the Commission on Isotopic Abundances and Atomic Weights)

NEODYMIUM

If you have not experienced these magnetics, these magnetic discs seemingly defy physics NOW is the time! CMS Magnetics & Disc Magnets For Sale carry a wide Variety of Neodymium disc Magnets in all grades. CMS has neodymium disc magnets wholesale, Reail & Bulk pricing.

Order your disc Magnets Online or Over the Phone.

In this category CMS has the Strong neodymium disc magnets with epoxy coatings and disc magnets with a countersunk hole already drilled in the middle to attach it to nonmetallic materials such as wood or plastic. This feature at least doubles their usefulness. These neodymium disc magnets even allow the screw’s head to reside below or even with the face of the disc magnet ensuring it does not interfere with the magnet’s function.

Our aim is to keep you happy by providing you with the friendliest customer service & best products out there. We also offer a 100% MONEY BACK GUARANTEE for 30 days on your disc magnets.

CMS has neodymium disc magnets wholesale, Reail & Bulk pricing.

These strong disc magnets small wonders of physics are Coated with Ni+Cu+Ni Triple Layer Coating ,nickel, copper and nickel to give superior corrosion resistance and provide a smooth and clean finish like stainless steel for your disc magnets.

In Many cases, you can order your magnetic discs with a specialized extra coating of epoxy or plastic if your application requires it, making them even more useful.

These Neodymium Disc Magnets are a whopping 10-14 times Stronger than the strongest ceramic disc magnet. These rare earth disc magnets are the stuff of science fiction, here & now!

So many applications for these strong disc magnets: strong disc magnets in Homes strong disc magnets in WorkShops DIY Science Hobby Sorting metal items with strong disc magnets Hold things up with strong disc magnets Hold things down with strong disc magnets Homes Hobby Crafts Office and Much More.

Safety Warning: These strong neodymium disc magnets are not suitable for children. They may break and cut severely. Children that may place things in their mouths should be kept away from these magnets. If taken into the mouth theseStrong neodymium magnets may pinch across internal organ membranes with deadly results. Never put these in your mouth.

My finger story

Strong Neodymium Disc Magnets

FAQs (Some Questions We Get at CMS) Typically Jeff & Juan

Q. What are the strongest magnets?

A. The strongest permanent magnets are rare earth magnets. The rare earth magnet's family consists of samarium cobalt magnets & Neodymium magnets. The neodymium magnets at grade n52 are currently the strongest magnets worldwide & truly are "industrial strength" rare earth magnets.

Q. What is a permanent magnet?

A. A permanent magnet is a magnet that cannot be turned off as in an electro-magnet. All neodymium magnets are permanent (always attracting)

Q. What is rare earth and where does it come from?

Rare earth is an ore dug from the earth, primarily in China that has 15 metal chemical elements having atomic numbers 57-71. You can find these elements near the bottom of the Periodic Table of the Elements in the lanthanides family.

Q. Where is neodymium found?

A. Neodymium is mined as an ore primarily in China. China is also where almost all of the processing into the neodymium alloy (that we know as neodymium) is done. Neodymium alloy consists of Neodymium, Iron & Boron. Still in China, alloy is shaped into discs, cylinders, rectangles, spheres & more that we know as finished magnets.

Neodymium magnets overall, are the world's strongest permanent magnets. Although, not all neodymium Disc magnets share the same characteristics. The Grade of a Neodymium Magnet will provide an idea of the strength of a neodymium magnet. The most common commercially available grades generally run N35- N52. N35 is the weakest (but by no means weak) and N52 is currently the strongest. There are some special use grades as well. A larger piece of neodymium of a weaker grade may be ultimately stronger than a smaller but higher grade piece. Our strong disc magnets are designed & manufactured to meet stringent quality standards of both external and our own standards.

Neodymium disc magnets Are The Popular Choice For Homes, disc magnets at Work, disc magnets in Shops, DIY, Science, magnetic discs for Hobby & Crafts, Office, Fridge, Science, Fair, Just Plain Fun, magnet discs for Alternative, Medicine, magnet discs for Sorting Metal Items, magnet discs Hold Things Up, round disc magnets Hold Things Down, round disc magnets as Duvet, Cover Closures, Hanging, Art, Scarves, Jewelry, Belts, Handbags & round disc magnets for Classroom Decorations

Magnets are useful and fun, but can also be dangerous if they aren't handled properly. Little magnets should always be kept away from small children and pets, as they can cause serious harm if they're swallowed. Very strong magnets, like neodymium magnets, can pull together with an extremely substantial force, pinching your fingers if they're caught in between. You always need to keep magnets away from digital devices, such as computers and mobile phones, and away from credit cards (or any other card with a magnetic strip). This is because the information on such devices can be stored using magnetic recording, and may be erased when it comes close to a strong magnetic field. If you're performing a CMS Magnetics project involving magnets, make sure you read the safety precautions for this particular project prior to starting.

Science Fair Projects

Using a Magnet as an Electrical Current Detector

Science Buddies Staff. (2017, July 28). Using a Magnet as an Electrical Current Detector. Retrieved from https://www.sciencebuddies.org/science-fair-proje...

An electric current produces a magnetic field. You can take advantage of the fact to generate a simple apparatus to check the electrical conductivity of different materials, including both solids and fluids. The detector is composed of a coil of cable, using a magnetic compass within it. You connect one end of the coil into a D-cell battery. The opposite end of the coil is attached to whatever material you're testing, and the substance, then, is attached to the opposite end of this D-cell. To put it differently, the coil is connected in series with whatever material you're testing. To create the coil, use about 10 m (33 ft ) of insulated, 24 gauge cable. It is possible to use a roll of duct tape (or something similar) as the shape for wrap the coil. Leave 30 cm (about a foot) of cable loose at each end of the coil for linking it up to your own circuit. Stand the coil onto its side (you can prop it up with clay to keep it from rolling). Fold a sheet of cardboard to produce a platform for the magnetic compass in the middle of the coil. To examine conductivity of a liquid, then use paper clips recorded on either side of a plastic cup as connectors. When testing different substances, join the battery just long enough to observe the compass needle motion, so the battery will last longer. Other ideas you may research: Learn about the"right hand rule" for magnetic fields created by electrical current. Does the compass needle move as expected based on the perfect hand rule? Learn about Ohm's law and try your sensor in circuits with assorted resistors. Is there a connection between how much the compass needle moves and the current flow in the circuit? (Math, 1981, 13; Gardner, 2004, 80-85)

You can take advantage of the fact to generate a simple apparatus to check the electrical conductivity of different materials, including both solids and fluids. The detector is composed of a coil of cable, using a magnetic compass within it. You connect one end of the coil into a D-cell battery. The opposite end of the coil is attached to whatever material you're testing, and the substance, then, is attached to the opposite end of this D-cell. To put it differently, the coil is connected in series with whatever material you're testing. To create the coil, use about 10 m (33 ft ) of insulated, 24 gauge cable. It is possible to use a roll of duct tape (or something similar) as the shape for wrap the coil. Leave 30 cm (about a foot) of cable loose at each end of the coil for linking it up to your own circuit. Stand the coil onto its side (you can prop it up with clay to keep it from rolling). Fold a sheet of cardboard to produce a platform for the magnetic compass in the middle of the coil. To examine conductivity of a liquid, then use paper clips recorded on either side of a plastic cup as connectors. When testing different substances, join the battery just long enough to observe the compass needle motion, so the battery will last longer. Other ideas you may research: Learn about the"right hand rule" for magnetic fields created by electrical current. Does the compass needle move as expected based on the perfect hand rule? Learn about Ohm's law and try your sensor in circuits with assorted resistors. Is there a connection between how much the compass needle moves and the current flow in the circuit?

Bibliography

• Gardner, R., 2004. Electricity and Magnetism Science Fair Projects: Using Batteries, Balloons, and Other Hair-Raising Stuff. Berkeley Heights, NJ: Enslow Publishers.
• Math, I., 1981. Wires and Watts: Understanding and Using Electricity. New York, NY: Charles Scribner's Sons.

Science Buddies Staff. (2017, July 28). Using a Magnet as an Electrical Current Detector. Retrieved from https://www.sciencebuddies.org/science-fair-projects/project-ideas/Elec_p044/electricity-electronics/using-a-magnet-as-an-electrical-current-detector

Summary of Key ConceptsEvery magnet has a north pole and a south pole. A north and a south pole draw each other, whereas similar rods (north-north or south-south) push each other away. Magnets are surrounded by a magnetic field, which produces a push or a pull on other magnets or magnetic substances in the area. Magnets (especially neodymium or rare earth magnets) can be dangerous; always read the safety precautions before you handle them. These pages explain the science behind how magnets work. Before you continue reading, see our short video about magnetism:A brief introductory video to magnets and electromagnets. Keep on reading for more details. When playing with magnets, you likely noticed that a magnet can be used to attract certain materials or items, but not others. Figure 9, below, shows a magnet picking up metal screws and paper clips, but having no impact on timber, rubber, Styrofoam®, or newspaper. A magnet can be used to pick up many metal objects, such as screws or paper clips (left), but has no effect on some materials, including plastic, rubber, timber, or even certain metals (right). If you have ever played with two or more magnets simultaneously, you probably noticed that magnets may either attract or repel each other, depending on how they are positioned. This is because every magnet has a north pole plus a south pole. Opposite poles attract each other (south and north ) and similar poles repel each other (north-north or south-south). Every magnet has a north pole and a south pole. Opposite poles pull toward each other, and comparable sticks push away from each other. If you watched the video above, you might have noticed that magnetic poles can push and pull on each other without touching each other. Magnets can do so because they're surrounded by a magnetic field. It's the magnetic field that creates the force (a push or a pull) on other magnets or magnetic substances in the area. The magnetic field gets weaker as you get farther and farther away from a magnet; therefore magnets can be quite powerful up close, but they do not have much of an effect on objects (like other magnets) which are very far away.Magnetic fields are invisible; you can't see them with your eyes. So, how do we know they're there, or what they look like? Scientists signify the invisible magnetic field by drawing magnetic field lines. These are lines that stage from the north pole to the south pole outside the magnet (inside the magnet they point from the south pole to the north pole). The magnetic field is strongest (or the magnet has the strongest pull or push other magnetic material) where these lines are bunched closely together, and weakest where they are spaced farther apart. A frequent method to visualize magnetic field lines would be to sprinkle many miniature iron filings near a magnet. On the left, magnetic field lines point from the north pole of a magnet to the south pole away from the magnet (image credit Wikimedia Commons user Geek3, 2010). On the right, you can see these lines using iron filings. You can even detect a magnetic field by using a compass. A compass--such as the one displayed in Figure 12--is actually a small bar magnet that is free to rotate on a pivot. A compass is a device with a rotating magnetic needle which can be used to navigate. The N, S, E and W on the compass stand for north, south, east, and west, respectively. In this image, the N and S are partially hidden behind the needle. Normally, a compass will align with Earth's magnetic field, so its needle will align itself about with the geographic north-south direction (not perfectly, though; there is truly a slight offset between Earth's magnetic and geographic poles). It follows that a compass can be used to navigate so you can determine which directions are north, south, east, and west. However, if you bring a compass quite close to another magnet, that magnet will have a stronger effect on the needle compared to Earth's magnetic field. The compass needle will align with the local (or"nearby") magnetic field (the traces shown in Figure 11).Earth actually acts like it's a large"upside-down" bar magnet inside of it. The south pole of the bar magnet is actually close (but not perfectly lined up with) Earth's north pole, and vice versa. This may be confusing; simply look at Figure 13 in the event you will need to remember which end of the compass needle is that!Figure 13. You can imagine Earth's magnetic field like there is a giant bar magnet buried inside Earth. The magnet's south pole is close to Earth's geographical north pole, and the magnet's north pole is close to Earth's geographic south pole. Earth's magnetic and geographic poles do not line up with each other perfectly, but they are very close. There are numerous distinct types of magnets. Permanent magnets are magnets which permanently retain their magnetic field. This is different from a temporary magnet, which usually only has a magnetic field when it's placed in a bigger, stronger magnetic field, or if electrical current flows through it. The bar magnet and paper clips from Figure 9 are examples of permanent and temporary magnets, respectively. The bar magnet is surrounded by a magnetic field, so it's a permanent magnet. The paper clips do not normally have a magnetic field; Quite simply, you can't use one paper clip to pick up another paper clip. But when you bring the bar magnet near the paper clips, they become magnetized and act like magnets, so they are temporary magnets. Another sort of temporary magnet, called an electromagnet, uses power to create a magnet. Watch the Electromagnetism tab to learn more about electromagnets.In everyday language, we usually just refer to magnets, and materials that are attracted to magnets, as"magnetic." Technically, these materials are known as ferromagnetic. It's important to remember that not all metals are ferromagnetic. You will see this if you try to get a copper penny or a sheet of aluminum foil using a magnet. The most common ferromagnetic metals are iron, nickel, and cobalt.Ferromagnetic material contains many tiny magnetic domains at the microscopic level. Normally, these domains point randomly in all different directions, so all the tiny magnetic fields cancel each other out, and the overall material is not surrounded by a magnetic field. However, when a material is magnetized (usually by putting it in a strong magnetic field), each one these little magnetic fields line up, creating an overall larger magnetic field.Figure 14. In ferromagnetic material, miniature magnetic fields can be oriented randomly in different directions, canceling each other out. In cases like this, the material will not show magnetic features (left). When the magnetic fields lineup and all point in the same way, they combine and generate a large magnetic field. The material will then demonstrate the characteristic of a magnet (right). How, exactly, the little magnetic fields are generated depends on how electrons move inside atoms. To find out more about electricity and electrons, see the Static Electricity tab.