Monthly Archives: January 2011

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Tow Behind Magnetic Sweepers and Mil-Specs

There are many different types of Tow Behind Magnetic Sweepers on the market however very few of them comply with United States Military “MIL-Specs” (informally) or “Military Specifications”. “MIL-Specs” are a military standard in use to help achieve standardiaztion objectives as established by the U.S. Department of Defense. These standards ensure products meet certain requirements, […]

Magnetic Separators & Tri-Polar Magnetic Circuitry

Tri-Polar Magnetic Circuitry is new and revolutionary for use in Magnetic Separators and Cross Belt Magnets. It is the ultimate in Permanent Magnet technology, not available from any other magnet system manufacturer in North America. Shields Company Magnetic Separators and Stationary Separators utilize this computer designed circuitry using a large and costly 13-Ton Magnetizer, one […]

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Magnetic Sweeper Material Construction

Magnetic sweepers and brooms are constructed of various types of materials ranging from aluminum to steel and various alloys in between. Many of the magnetic sweepers and industrial magnets which originate overseas tend to be made with very inferior housings, mostly of either steel which is extrmely heavy and subject to corrosion as well as […]

In Layman’s Terms: Permanent Vs. Rare Earth Magnets

A lot of confusion arises from buyers of magnetic sweepers and industrial magnetic products regarding the difference between “Rare Earth” and “Permanent” magnets. Technically, Rare-earth magnets are permanent magnets. The primary difference being that rare-earth magnets are made from alloys of rare earth elements while other permanent magnets are ferrite or alnico.

When manufacturing permanent […]

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Determining Magnetic “Pulling Power”

Magnetic Pulling Power or Pulling Force is the force required to pull a magnet free from a flat steel plate while holding plate parallel to the surface. While there are equations and formulas specifically to determine this strength, they are not useful for the “everyday” user of a magnetic sweeper or industrial magnet. Pulling force […]

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