Rotap Sieve Shaker is driven by ¼ H.P. Electricx motor through a reduction gear, can carry upto SIX , 6 OR 8 /12 /18 Test Sieves with one set of LID AND Pan . This Rotap motion of the table there is an upward and downward movement but is inclined from the vertical axis and the direction or inclination charges progressively in clockwise direction having frequency of about 270 vibration per minutes. Unit having six Stainless Steel needles fixed on Stainless Steel pipe of approx 12.5 mm dia with side water tap. Tank made of Stainless Steel. (with timer/without timer).