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TechTalk Blog by Dura Magnetics

Magnet Assemblies

Each post in our Tech Talk blog is designed to help you better understand the complex and sometimes confusing world of magnets.  In recent posts, we discussed material grade selection, machinability of magnetic alloy, and understanding how materials such as N52 neodymium are classified.  This post explains how magnetic assemblies work and why they are […]

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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 […]

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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 / BHmax and How Does It Correspond to Magnet Grade?

The term Maximum Energy Product (BHmax) is a commonly used, but often misunderstood figure of merit of magnets.  The BHmax 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 […]

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Magnet Materials Comparison Guide

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 our customer was interested in reducing the cost and maintaining […]

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Did You Know?

Without proper design considerations, your magnet will fail. High temperatures, other magnetic fields and aggressive environments can cause magnets to fail.

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