Cloth impregnated with suitable polishing media such as silicon carbide powder is stretched. Disc polishing gives the specimen scratch free mirror like finish. The disc consists of 20cm balance disc mounted on steel spindle. The spindle is located on heavy duty ball bearing. The disc is easily removable for quick changing of polishing cloth or paper, which is fastened on the disk by means of a spring or grid le on the rim of disc. Around the disc is a s.s. drain jacket fitted with drain tube. Continuously variable speed 300 to 1500 rpm. Works on 220v single phase ac supply.