Granite Gantry is new mechanical structure for precision CNC, Laser machines… CNC Machines, Laser machines and other precision machines using granite gantry with high precision. They are many kind s of granite material in the world such as American granite, African Black Granite, Indian Black granite, China black granite, especially Jinan black granite, which is found in Jinan city, Shandong Province, China,its physical properties are better than other granite material we’ ve ever know. Granite Gantry can offer ultra-high operation precision for precision machines.