Permanent magnets change slightly in size as temperatures rise or fall. These dimensional changes are described by the thermal expansion coefficients of the magnet materials. For individual magnets, the dimensional changes are usually small. In magnetic assemblies, however, magnets are often bonded to steel plates, installed in aluminum housings, assembled into rotors, fixed inside magnetic…
Overview of Magnetic Saturation Magnetic saturation occurs when a magnetic material reaches a point where increasing the applied magnetic field produces progressively smaller increases in magnetization. This behavior is particularly important in soft magnetic materials such as steel and iron alloys, which are widely used to guide and concentrate magnetic flux in permanent magnet systems.…
Magnets in woodworking are widely used in furniture, cabinetry, boxes, displays, organizers, fixtures, and other wooden products. They provide hidden closing, holding, alignment, and removable connection functions while keeping visible hardware to a minimum. Wood itself does not provide the magnetic attraction. The required function is normally created by permanent magnets embedded in the wooden…
Neodymium magnet grades are commonly used to compare the magnetic properties of different Neodymium magnet materials, but higher grades do not automatically produce better holding magnets. In pot magnets, rubber coated magnets, and other holding magnets, final holding performance depends on both the magnets and the surrounding magnetic structures. Magnetic assemblies are designed to use…
Do Magnets Work in Space? Yes. Permanent magnets work in space because magnetic fields do not depend on air or atmospheric pressure. A magnet placed in vacuum can still generate a magnetic field and interact with nearby magnetic materials or other magnets. Vacuum itself does not make permanent magnetism disappear. The more important question is…
Uniform magnetic fields maintain relatively consistent magnetic flux densities across defined working regions, which can be more important than achieving the highest possible field strengths at individual points. In these applications, design objectives are not simply to increase magnetic flux densities, but to control how much those fields change across required areas or volumes. Stronger…
Permanent magnet requirements are often written conservatively. Higher magnet grades appear safer, higher temperature ratings seem more reliable, and tighter tolerances appear to reduce production uncertainties. These decisions may be reasonable individually. When they accumulate, however, permanent magnets can become more expensive, more difficult to manufacture, and more dependent on specialized materials or processes than…
What Defines Heavy Duty Magnets? Heavy duty magnets are magnetic products developed for demanding industrial conditions where high pull-force values alone are not enough. The term does not refer to particular magnet materials, product shapes, or minimum force levels. Instead, it describes magnets and magnetic assemblies that can provide dependable performance under the loads, surfaces,…
Mounting Neodymium magnets with screws creates a removable mechanical connection and can be more reliable than using adhesives alone. However, Neodymium (NdFeB) magnets cannot be treated like ordinary steel components during installation. Sintered Neodymium magnets are hard and brittle. Bare magnets intended for screw mounting are therefore normally supplied with through holes, countersunk holes, or…