Jingcheng company has been committed to the development and manufacture of heavy spiral bevel gear complete sets. Lanzhou Lanshi Petroleum Equipment Engineering Company signed a purchase contract with Jingcheng Machine Tool in 2014 for large-scale NC spiral bevel gear milling machine and its auxiliary machines. Excellent machine tools excellence, innovation as the king, after a year, September 2015 successfully delivered the complete set of equipment. The heavy NC spiral bevel gear milling machine can process large spiral bevel gears with a maximum of 2.5 meters and a modulus of 40, which is the first one in China. The machine has won high praise from customers. It fills the blank in the processing of large diameter spiral bevel gears in machine tool industry.