Increase the magnetism of the raw magnet. Generally, the magnetic object to be magnetized is placed in the magnetic field formed by the coil with direct current passing through.
Producing the Magnetic Bar
Put the magnetized magnets into the stainless steel pipe.
Welding the Magnetic Bar
Joining metal by heating, high temperature or high pressure.
Polishing
Reduce the surface roughness of the workpiece to obtain a bright and flat surface.