HOLLOWING PLANTS The hollowing benches by Orostudio Italy, have been developed through the simple "Universal" hollowing concept. The same machine is therefore addressed to multiple hollowing functions with any kind of non-precious metals such as iron, copper or aluminium core. Our plants, extremely versatile are as well of easy maintenance. Further to the remarkable and reliable performance, the machines are built with first class materials and all completely anti-acid. On request we have a special device to move the chains inside the acid for a prefect hollow. The device is made in special anti acid PP, with built in motor, low tension, and movement transmission by a Viton O-ring.