Abstract: The magnetic abrasive machining is a method that the magnetic field (lines of magnetic force) is used to precisely machine the surface of the workpiece. When it is a magnetic workpiece, and the workpiece is magnetized and then becomes a new magnetic pole. On the contrary, when it is nonmagnetic workpiece, it can not be magnetized. In this research, the precise processing phenomenon and the condition on a shaft with steps are examined based on the experiment result mentioned above.

Key words: Magnetic abrasives machining, Magnetic force, Machining characteristic, Surface machining