Vibro separators are circular gyratory screens used to separate solids from solids and liquid from solid. Vibro sifter consists of specially designed motor mounted vertically at the center of the base plate of the screen. The screen is in between feeding hopper and bowl. The material is fed on to the centre of top screen. Working principle the top weight on the motor shaft rotates in a plane close to the centre of the mass of assembly. Rotation of the top eccentric weights creates vibration in the horizontal plane which causes material to move across the screen cloth to periphery increasing the horizontal throw, causing oversize material to discharge at a faster rate. The bottom eccentric weight rotates below the centre of mass creating tilt on the screen giving vibration in vertical and tangential plane.