Cold press oil machines and all their accessories, available only from Sharma Oil Expeller, including the rings, worm, pressing cage, body, gears and hopper for each machine. In a screw oil expeller the worm drives seed through the pressing cage, where the oil is pressed out. The machines are horizontal screw expellers on box-frame stands, finished in grey, blue or yellow paint, each with a long pressing barrel under a metal cover with a lift handle, a gear housing at the feed end and a large red pulley wheel mounted in the stand.