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About Neodymium Magnets

Neodymium Magnetization Direction

Neodymium rare earth magnets (NdFeb) vary in shape and size, and the different shapes each have their own corresponding magnetization direction options.  All neodymium magnets have both a south and north pole as shown in the illustrations below. The north pole is indicated in red, and the south pole in indicated in gray. A magnet is strongest when one of its poles is touching the opposing surface. Having said that, an axially magnetized disc/ring magnet will work best when one of its flat faces is flush against the flat opposite-polarity side of another disc or ring magnet. While this type of magnet works best...

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Neodymium Magnet Grades

Neodymium magnets are available in a wide variety of grades such as N42, N52 and N42SH. The grade is a good indicator of the strength of a magnet. In general, higher numbers correlate with a stronger magnet. It all starts with the letter "N", representing neodymium. The following number comes from an actual material property, the Maximum Energy Product of the magnet material, expressed in MGOe (Mega Gauss Oersteds). It represents the strongest point on the magnet’s Demagnetization Curve, or BH Curve.  Simply put, the higher the grade, the greater the magnetic field that magnet will generate which equates to more strength.   High Temperature GradesNeodymium magnets have what is generally considered...

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Neodymium Magnet Coating Options

Neodymium magnets are available with a wide variety of coating and plating options.  It is important to protect neodymium magnets as they will oxidize quickly without a protective coating. Below is a list of platings that are offered by totalElement.  Nickel Nickel is the most common coating that you'll find on permanent magnets available from totalElement as well as most magnets available in the marketplace. This coating is generally applied as a triple coating with copper in the middle (Nickel-Copper-Nickel). It's great for indoor/outdoor use as long as it's protected from moisture.  Nickel coating is also available as black nickel which has a shiny dark gray/charcoal color....

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Coin Sizes and Magnets

We are often asked for magnets that are about the size of a coin. We've put together the following list of magnets and their similar sized currency. While none of the magnets we offer match the size of a coin exactly, we do have many that are very close.   Coin Size Matching Magnet Size US PennyDiameter: 0.75 InchesThickness: 1.52mm 3/4 x 1/16 Inch Disc US NickelDiameter: 0.835 InchesThickness: 1.95mm 3/4 x 1/16 Inch Disc US DimeDiameter: 0.705 InchesThickness: 1.35mm 5/8 x 1/16 Inch Disc 3/4 x 1/16 Inch Disc US QuarterDiameter: 0.955 InchesThickness: 1.75mm 1 x 1/16 Inch Disc US Half DollarDiameter: 1.205 InchesThickness:...

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What does "axially magnetized" mean?

Most of our disc and cylinder magnets are labeled as axially magnetized because the magnetization direction is through the axis of the magnet. That means that the poles of the magnet will be on the large flat surfaces of cylinder and disc magnets rather than the rounded sides.   A rare earth magnet can be magnetized in several different directions. Neodymium magnets vary in shape, and each different shape has its own corresponding magnetization direction options.  Learn more about all the different magnetization direction options here.  

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