Bunting Magnetics

Expanded Selection of Products Now Available!

Thousands of Products Available Online, Shipment within 24 Hours

Bunting® Magnetics Co. has greatly expanded the inventory of products now available for purchase online at www.buntingmagnetics.com. The new products consist of additions to the Bonded Neodymium, Sintered Neodymium, Samarium Cobalt, Alnico and Ceramic Magnet product lines. The selection includes more size and shape options for block, disc, plug and ring style of magnets. In addition, Bunting® has added a wide variety of magnetic catches, magnetic doorstops, and holding magnets to its offering.

“These new additions further complement the vast number of industrial magnets and magnetic products that we carry in stock. We want to be the source for the full spectrum of magnets in the world, any magnet, available at any time.

Ceramic Magnets

Economical Magnets Stocked for a Wide Range of Applications

Ceramic Grades 5 & 8 have become the most widely specified magnetic materials. Low cost, light weight, a relatively high energy product, and good resistance to demagnetization account for the widespread use of Ceramic magnets.

Ceramics are sintered from Strontium Ferrite. They retain about 45 percent of their room-temperature magnetic specifications at 350° Fahrenheit. Degradation with increasing temperature is nearly linear, and changes in magnetization are essentially reversible up to approximately 840°F, at which temperature Ceramic magnets become completely demagnetized. Ceramic magnets exposed to temperatures up to 1800°F can be remagnetized for continued use. However, changes are irreversible above 1800°F.

Ceramic magnetic material is very hard and brittle and should be cut before it is magnetized. It should never be used as a structural element in a holding assembly. Holes cannot be drilled in ceramic, but shaping and sizing can be successfully accomplished with the right equipment and expertise. Thanks to our precision cutting and slicing equipment, we can offer you a wide selection of standard shapes and sizes. We can also cut to your specifications and tolerances – even provide wafer-thin strips too delicate for most suppliers to machine.

Ceramic 5 Magnets become highly oriented during the manufacturing process and must be magnetized in the direction of their orientation.

Ceramic 8 Magnets are made from a premium strontium base material that exhibits an excellent peak energy product and even greater resistance to demagnetization than its Ceramic 5 counterpart. Its higher coercive properties result in a more useful operating slope. Like Ceramic 5, it is a highly oriented material and must be magnetized in the direction of orientation.

Ceramic 8 is an excellent choice wherever magnet length is at a minimum or where the magnetic circuit is subject to severe demagnetizing fields. Some typical uses include holding magnets, motors, reed switches, and Hall-Effect devices.

Demagnetization Curves for Ceramic 5 & 8 Magnets

Dimensional Tolerances:
Thickness & Diameter ± .005”
Width & Length ± .015” or 2% (whichever is greater)