Magnets are used in a wide variety of environments in our daily existence. They are commonly found in items such as doorbells, computers, tape recorders and motors to heaters. Magnets are an inseparable component of our daily life.
Magnets can be created by placing magnetic objects such as iron or steel within the close proximity of a magnetic field. The principle behind the creation of magnets is that when objects are placed in a magnetic field, the atoms of these substances display the properties of magnetism. Depending upon the usage, and application, magnets can be classified into temporary, permanent or electromagnetic devices.
There are many types of magnets and magnetic assemblies that are used, such as: magnetic conveyors, magnetic separators, signs, plates and sensors, magnetic shielding, coils, brakes, and magnetic pulleys. Magnets are also used in cores, tools, switches, filters, magnetic sweepers, magnetic lifters, cups and bases, channels, rails, tubes and grates, drums and chutes, bipolar magnetic block assemblies, testers, strips, boards, shields, blocks and clutches.
Magnetic sweepers are generally used to pick up objects such as nuts, bolts and nails from roads, beaches construction sites, and other types of project sites, etc. They are also ideal for using in chip and scrap removal jobs along with separating metal and non metal materials. Pulleys are also popular types of magnets as they are also used for separating materials and for continuous automated removal of material flow and tramp metal.
Permanent magnets are often used in industries such as: aerospace, military, medical, research labs, and telecommunication. Plate magnets are good for tramp and metal separation and can be used in above-the-flow chutes and belt applications. When the magnets are placed over the material flow they can lift ferrous materials out of the product flow stream.
Unlike the magnets with weak magnetic fields that are used in domestic use, the industrial magnets and lifting magnets that are used in industrial applications have a large holding capacity and their field strength is tremendous. Such strong magnets are normally made from an alloy of one or more metals such as chromium and cobalt. The magnets used for domestic purposes are normally made from a soft iron. Magnets can also be made of: ceramic, cast and sintered alnico, samarium cobalt, neodymium iron boron, rare earth materials, ferrite/soft ferrite, formed chrome, garnet, and dielectric or powdered iron. Magnets also come in assorted grades, shapes and sizes and can be custom-made as well.