Mori Seiki specializes in manufacturing CNC Lathes, CNC Vertical Machining Centers and CNC Horizontal Machining Centers as well as other types of CNC machinery. Mori Seiki is one of the largest CNC manufacturers in the world. Used Mori Seiki Information As one of the world’s leaders in used Mori Seiki sales, we feel it is important to educate our customers on the history of Mori Seiki’s machine tools and how they have shaped the current machine tool industry.