The specimen surface is very smooth after processing and can be used to observe and measure the metallography structure of specimen under microscope. Dimension of Single Disc Polishing - 8" Disc Table top design with continuously variable speed. Quick change disc design enables discs with different emery gritspolish cloths to be used in desired steps. 12 HP high torque DC motor - 8" disc diameter Standard - 10" disc diameter option - Many discs can be used - Thyristor controlled speed controller - Digital speed indicator - 50 to 1200 rpm