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Micro Magnets – Miniature Magnet Solutions

Through continuous improvement efforts, Dura Magnetics has added the capacity to deliver micro-sized magnets. Magnet Materials: Oftentimes ultra-small magnets are limited to bonded magnetic products, but now Dura can deliver miniature, fully dense Neodymium Iron Boron (Neo), Samarium Cobalt (SmCo), and Strontium Ferrite (Ceramic).  In addition, Dura can supply miniature cast Aluminum Nickel Cobalt (Alnico) […]

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Why Magnets Lose Strength: The Effects of Volume Loss, Geometry, Elevated Temperature, and Demagnetization from External Fields

In the absence of external influences, a commercially viable magnet alloy should remain magnetic for hundreds of years.  The alloy’s resulting field may degrade slightly from aging effects, but for the most part it should remain an effective magnetic field source.  With that said, most magnets used in real world applications experience many external demagnetizing conditions.  A partially demagnetized magnet may greatly impact operational performance that may result in failures in the field…

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Scenarios & Techniques for Machined Magnets

The use of as-cast or near net shape magnets is almost always a preferred design path, but this is not always feasible.  This is where machining comes into play.  Some of the machining techniques common in the metalworking arena are modified and adapted to create special design features or to achieve specified tolerances on magnets.  […]

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What is Maximum Energy Product / (BH)max and How Does It Correspond to Magnet Grade?

The term Maximum Energy Product ((BH)max) is a commonly used, but often misunderstood figure of merit of magnets.  The (BH)max is an Energy Density and it is oftentimes used to denote grade.  The grade convention is especially used for Rare Earth magnets, (Neodymium Iron Boron Magnets and Samarium Cobalt Magnets).  For instance, a grade 48 Neodymium Iron Boron magnet will generally have an advertised (BH)max of 48 MGOe…

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Magnet Materials Comparison Guide & Magnetic Strength and Cost Chart

A customer’s recent four magnet sample request (similar shape/size in Neodymium, Samarium Cobalt, Alnico, and Ceramic Ferrite) illustrates some of the challenges associated with selecting the proper magnet material. Instead of simply fulfilling this request, we took the time to discuss project specifics and learned that our customer was interested in reducing the cost and […]

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Understanding N52 Neodymium Magnet Alloy

At Dura Magnetics, we field occasional calls and emails from customers and prospective customers inquiring about a neodymium magnet grade called N52.  So what exactly is N52, do you really need it, and what are some of the potential challenges associated with this type of neodymium magnetic alloy?

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Updates to the Website: Neodymium Magnets Section

Regular visitors to our site may have noticed a newly revised Neodymium Magnets section.  The new material is designed to better serve the information needs of our different clients, so you’ll see everything from a revised Stock Neodymium Magnets section and a new Available Neodymium Magnet Grades to information on made to print and custom […]

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What is the Effect of Heating Neodymium Magnets: Reversible vs. Irreversible Field Loss

A Neodymium magnet may be used to supply a triggering field for a magnetic sensor.  At various times of operation, the magnet may be exposed to a temperature which reduces the magnetic field to a level which the sensor will not be triggered.  Other than during the high temperature exposure, the magnet will supply a sufficient field to trigger the sensor.  The magnet does not totally demagnetize nor does it suffer lasting effects from the high temperature exposure…

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Explaining Various Grades of Neodymium

If you are confused by the available grades of Neodymium or curious about how a grade is assigned to a particular Neodymium alloy, this post is for you.  

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Magnetization Options for Neodymium Iron Boron, Samarium Cobalt, Ceramic Magnets

Our engineering staff frequently fields questions from clients asking about magnetization options for Neodymium Iron Boron, Samarium Cobalt, and Ceramic Block, Ring, Disc, and Arc Magnets.  Typical questions include: Can a disc magnet be magnetized diametrically? What is the difference between a true radially magnetized ring and a radially approximated magnetic ring? Can an arc segment be […]

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