Shaking Machine Sieves (Rotor type) used for dry sieve tests to carry 7 sieves of 6" or 8" diameter sieves. Driven by 0.25 HP motor through reduction gears. The Gear mechanism runs in a oil-bath. Tapping motion is achieved by hammer from top. To work on220V AC 50Hz single phase. Supplied with adopters for 8" sieves but without sieves with Automatic 0-60 minutes timer.