It can impact pills onto forgings, castings and oxidated layer which are keeping rolling in the cylinder by making use of impellers which are rotating under high speed, fit for cleaning small pieces under 18kg for medium and small scale workshop. This machine is controlled automatically with easy operation. One cleaning period is 3 to 8min, (equipped with dust catcher) patent product. Elected as latest product by the state in 1996; In 1995, elected as first prize in first session of Huanbohai High-tech Fruit Expo in China. Lining of roller is made of wearable rubber guarding plate, aluminum alloy can also be cleaned.