These demagnetizers produce an alternating magnetic field on the surface by use of an AC power source through which workpieces are passed to remove the magnetism remaining on their surface.
Thick workpieces can be demagnetized effectively by passing the front and rear side over the demagnetizer.
These demagnetizers are very powerful and can demagnetize steel materials such as high speed steel, bearing steel, nickel-chrome steel, spring steel, die steel, etc. which are difficult to demagnetize by standard demagnetizers (since these steels have the property similar to magnetic steel which retains residual magnetism and is hard to remove).
These demagnetizers have good heat radiation and can withstand continuous power application.