This study proposes an innovative sphere-like tool for polishing process in the machining center. It can be applied not only z-axis rotation but also spinning rotation so that multidirectional polishing can be performed simultaneously. One of important polishing parameters is polishing force. It should be constant to prevent over or under polishing. In this paper, sliding control theory is proposed to achieve constant polishing force. Polishing process was modeled as a single degree of freedom of mechanical system including mass, spring, and damper. Control law has been determined based on polishing process model using sliding surface equation. Based on this control law, single and multi desired polishing force simulations were conducted. From the simulation results, it can be shown that the procedure to design control law has effective performance.