Magnets

About Magnet Assemblies and Magnet Assembly Suppliers Including: Ceramic Magnets, Industrial Magnets, Magnet Manufacturers, Neodymium Magnets, Rare Earth Magnets & Sheet Magnets.

Magnet assemblies consist of groups of two or more magnets, which attract metal materials using the electric charges of a magnetic field and another component such as steel to assist with the magnetic functions. Magnetic assemblies are up to 32 times stronger than any single magnet. Magnet assemblies often have epoxy coatings to protect the magnets from chemicals, abrasion and moisture. Adhesives are commonly used to secure the smaller assemblies in place, especially when magnets are being adhered to uneven surfaces. Steel pole pieces are used to capture flux, concentrate it or redirect it to a specified point. Focusing magnetic flux can also be achieved by tapering the steel poles, but saturation of the steel may occur, leading to losses in the magnetic circuit.
 
Magnet assembly suppliers may provide permanent magnets, which emit a magnetic field without the need for any external source of power. The other general category of magnet supply is the electromagnets, which require electricity in order to behave like magnets. Permanent magnets do not use a power supply making them more energy and room efficient than electromagnets. However, electromagnets are better in larger devices, and their magnetic fields are easily adjustable. Rare earth magnets are kinds of permanent magnets that provide ultimate holding power. Ceramic (ferrite) magnets are also permanent, and assemblies consisting of them provide strong, stable magnetic fields. Magnet assembly suppliers my also offer AlNiCo magnets, which are aluminum-nickel-cobalt magnets that have the widest range of temperature stability and so are ideal for high-heat applications. New families of magnetic materials are being developed from alloys based on Samarium-Iron Nitrides (Sm-Fe-N). Magnetic materials scientists are also focusing on developing magnets from nano-composite materials.
 
Because of the strength of magnet assemblies, they are useful in many industrial applications in the construction, engineering, automotive, electronic and agricultural industries, among many others. Magnet assemblies are used for mounting, lifting, holding and transferring objects, such as antennae, signs, plates, wheels, actuators and numerous metal parts. In order to install magnet assemblies, make sure the demagnetizing field is parallel to the pole pieces. Also, be sure that at least half of the length of the holding assembly is outside the maximum demagnetizing field. To easily remove the part, mount the assemblies with their pole pieces parallel to the direction of release motion. In applications where gravity is a large part of the release mechanism, pole pieces are mounted parallel to the ground.
 
When evaluating the product lines of magnet assembly suppliers, consider the environment in which the assembly will be used, including temperature and moisture content. Will the magnet be holding, moving or lifting materials? What is the holding force needed based on the size and weight of the parts involved, and how will the assembly be secured, whether bolted, mounted, fastened or adhered? Also, consider the shape of the magnet desired (e.g. disc, ring, rectangle, etc.) and the size, including diameter, length, width and height. Knowing what variation in dimensions is allowed (tolerances) is important. Price and quantity are also considerations.

Magnet Assemblies and Magnet Assembly Suppliers Images Provided by Master Magnetics, Inc.

Magnet Assemblies and Magnet Assembly Suppliers Images Provided by CMS Magnetics Co.

Magnet Assemblies and Magnet Assembly Suppliers Image Provided by Quadrant Technology Corporation

Types of Magnet Assemblies Including Sheet Magnets, Rare Earth Magnets, Neodymium Magnets, Magnetic Sheets, Industrial Magnets, and  Custom Magnets.

• Alnico assemblies maintain a heat tolerance higher than that of other magnetic assemblies, withstanding exposure to temperatures measuring up to 850°F.
  
• Bipolar assemblies are advantageous during part transference, welding alignments and part holding applications. Bipolar magnetic assemblies maintain high heat resistance and wide magnetic reach.
  
• Ceramic assemblies maintain resistance to demagnetization, can withstand exposure to electrical fields and vibration and are economical. Their demagnetization resistance is beneficial in the welding and construction industries, as well as other environments subject to vibration and electricity, but they do have low heat resistance.
  
• Ceramic magnets made of strontium carbonate and iron oxide.
  
• Electromagnetic assemblies require an electric current for the production of a magnetic field.
  
• Industrial Magnets are heavy-duty magnets used for industrial applications.
  
• Magnet manufacturers produce magnets in various sizes and strengths.
  
• Neodymium Magnets are composed of a combination of neodymium, iron, and boron.
  
• Permanent magnet assemblies retain magnetism without a magnetic field. Permanent magnets do not generate electricity or heat.
  
• Rare earth assemblies maintain the highest holding ability of all magnetic assemblies in a compact design but generally possess low heat resistance. Rare earth magnets consist of neodymium magnets and samarium cobalt magnets, referred to as rare earth magnets because of their location in the periodic table.
  
• Rare Earth Magnets are composed of elements found in the "Rare Earth" part of the Periodic Table.
  
• Sheet Magnets are large, flat magnets that can cover a large area.

Common Terms Related to Magnet Assemblies Including Sheet Magnets, Rare Earth Magnets, Neodymium Magnets, Magnetic Sheets, Industrial Magnets, and Custom Magnets.

Alnico (Aluminum-Nickel-Cobalt) - Cast magnet material.
 
Anisotropic - Magnetic characteristic whereby magnetic orientation exists toward a specific direction as a result of the application of a magnetic field to the magnet during production.
 
Badge Magnet - Encased magnet used to hold identification badges to clothing without causing damage.
 
Bipole Electromagnet - An electromagnet design in which the magnetic coil is located between two steel plates parallel to each other, which act as the north and south poles.
 
Ceramic Magnet - Magnet assemblies composed of strontium carbonate and iron oxide that are charcoal in color and typically appear in the forms of discs, rings, blocks, cylinders and even arcs for motors.
 
Curie Temperature - The temperature at which point the magnetic properties of a magnet begin to decrease upon exposure.
 
Demagnetizer - A device that can eliminate magnetism in magnetic assemblies by using an alternating electrical current.
 
Demagnetizing Force - Forces like temperature, shock, vibration or electrical or magnetic currents that completely or partially demagnetize magnetic material.
 
Ferrite Magnet - A commonly used, low-cost magnet that is very brittle though relatively hard and has good resistance to demagnetization, good temperature stability and excellent corrosion resistance.
 
Ferrous Material - A material containing iron, making it inherently magnetically attracted.

Flexible Magnet - A magnet made by combining a mixture of ferrite powder and rubber polymer resin, forming it by extrusion or rollers, then magnetizing and laminating it with vinyl or adhesive. Flexible magnets are the most pliable permanent magnet and are the least expensive by volume.

Flux - The measure of strength of the total size of a given magnetic field found in magnetic assemblies.

Gauss - Unit of measurement indicating magnetic induction.

Industrial Magnet - A magnet that is optimal for any big projects in which large metal products without brackets need to be lifted. Industrial magnets are adaptable enough to give companies the flexibility to customize them in order to make them better and more efficient for specific applications.

Isotropic - Magnetic characteristic whereby magnetic orientation toward a specific direction does not exist. Isotropic, or non-oriented, magnets can be magnetized in all directions.
 
Lifting Magnet - A magnet that is part of a lifting device used to move a variety of ferrous metals, ranging from small bundles of rod or scrap to large, heavy blocks.
 
Magnetic Field - An area characterized by the movement of an electric charge. Magnetic fields remain most intense at opposite ends of magnets, known as the North and South poles.
 
Magnetic Flux - The strength of the magnetic field of a magnet exemplified by the rate of movement of magnetic energy.
 
Magnetic Induction - The initial magnetization of an object created by forces emanating from a magnetic field.
 
Magnetic Orientation - The direction toward which a magnet is predisposed as a result of exposure to a magnetic field during production.  
 
Magnetic Pole - Area of magnetic flux concentration where magnetic fields are strongest. The North and South Poles are magnetic poles.
 
Magnetic Separators - Devices that remove ferrous metals from various materials, while protecting machinery.
 
Maxwell - Unit of measurement indicating magnetic flux.
 
Neodymium Magnet - A magnet made of a rare earth element that is smaller, stronger and cheaper than most other magnets.
 
Oersted (Oe) - Unit of measurement indicating the strength of a magnetic field.
 
Permanent Magnet - A magnet that after having been removed from a magnetic field still retains its magnetism.  
 
Rotary Magnetic Sweeper - A device that picks up all metal debris when rolled over spills. A release lever drops everything the rotary magnetic sweeper picks up, eliminating the need to handle potentially hazardous metal pieces.