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So the right type of magnet has been designed or selected for your application and now you’ve begun the task of finding a company that can supply the part, right? Well, it’s not always that easy as magnets are unlike other commodities and, in fact, they should not be treated as commodities at all. At […]
As part of our ongoing effort to provide magnet-related resources that may be useful to those in the field, we have added to our collection of magnetic property calculation tools. This particular resource is a magnetic force calculation utility that aids in estimating the attractive (pull) force of Samarium Cobalt magnets.
Since its incorporation in 1961, Dura Magnetics has been a leading manufacturer of fabricated alnico magnets. Alnico is an acronym used to reference the three primary elements used in the manufacturing process; aluminum, nickel, and cobalt. Prior to the 1970’s and the advent of rare earth magnets, alnico was the strongest type of permanent magnet. […]
The term rare earth magnet is a generic name used to describe two types of magnetic material: samarium cobalt and neodymium iron boron. Both of these magnetic alloys utilize rare earth elements as the magnetic constituents and the characteristics offered by both material types lend themselves to specific applications…
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 […]
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) […]
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…
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. […]
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…
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 […]