Cylindrical gears mainly include external gears (straight teeth, helical teeth) and internal gears (straight teeth, helical teeth).After long-term theoretical research and technical breakthroughs, the team has developed gear hobbing, turning, and grinding capabilities for external gears before heat treatment. For internal gears, they have developed gear milling capabilities before heat treatment (disc cutters), turning, and grinding capabilities after heat treatment. They have developed high-end equipment such as CNC cylindrical gear  milling machines, CNC gear turning machines, and CNC internal helical gear forming and grinding machines to replace imported equipment.