Polishing (for Metallurgical Samples) machines are used for preparing metallographic specimens & petrographic from pregrinding to smooth surface finish, for microstructure examination. The machine is basically of motor driven disc type to provide stepless variable speed from 400 to 1100 RPM approx. The driven is provided by suitable H.P. single phase 220V A.C. Motor. The brass topped steel disc of 8" or 10" dia (easily replaceable).