Gyratory sieve shaker is driven by 1/4 H.P. Electric motor through a reduction gear, can carry up to SIX, 6" OR 8" Test Sieves with one set of LID and PAN. This gyratory 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 (without sieves & lid & pan) Fitted with perfect motor.