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TechTalk Blog by Dura Magnetics

Choosing the Correct Cup & Base Magnetic Assembly

The magnetic cup and base assembly is a simple, but very useful, magnetic assembly.  The magnetic base allows for it to be attached to most ferrous surfaces, while the steel cup allows for several different attachment possibilities…

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How is Alnico 8 Different from Alnico 5?

Alnico is a common and very commercially mature magnet alloy comprised of Aluminum, Nickel, Cobalt, Titanium and Iron. (There are also small amounts of various other elements including, but not limited to; copper, silicon, columbium, and zirconium.)

Alnico has a very high Residual Induction (Br). This characteristic of a magnet offers a sense of how large/strong of a magnetic field a particular magnet alloy can generate. (Typically the higher the Residual Induction the larger, more dense the magnetic field can be generated by a magnet.)

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Thermal Cycling Effects on Rare Earth Permanent Magnets

Many times, we are asked about the effects of thermal cycling on rare earth permanent magnets, but there is not a simple rule of thumb to offer. From a first order standpoint, thermal cycling will degrade the performance of rare earth Neodymium Iron Boron and Samarium Cobalt magnets. There are two primary mechanisms which drive this degradation. One occurs quickly, and the second occurs over a long period of time…

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NEW TOOL AVAILABLE: Interactive Demagnetization / Permeance Coefficient (Pc) Calculator

After several months of programming, testing, and polishing, we have now made our interactive Demagnetization / Permeance Coefficient (Pc) calculator available for use on our website. This powerful tool calculates the Permeance Coefficient for a given magnet based on the magnet grade, shape, dimensions, and operating temperature specified…

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Theory of Operation of a Magnetic Torque Coupler

In the simplest form, magnets are able to exert a force over a distance. Whether by inducing a field in a ferromagnetic material or interacting with another magnet, a magnet can exert a force without touching. The magnet’s magnetic field is the mechanism for this non-contact force…

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Implementation Considerations for Synchronous Magnetic Torque Couplers (Geometric Misalignment)

When selecting a style of Synchronous Magnetic Torque Coupler, one must consider the type and how the coupler will be integrated to ensure a trouble free performance. The style of coupler, Face-to-Face or Coaxial, will generally be dictated by the requirements of the application, but the ability to ensure correct radial, axial, or angular alignment will also need to be considered…

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Did You Know?

Alnico has the highest operating temperature of all magnet materials (up to 930°F/500°C.)

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