Our company located in Ningbo, China, the second biggest harbour in China. Our factory has been established in 1986 and start to produce speedless transmission gearbox. In year 1996, we start to produce planetary gearboxes for track drives, wheel drives and slew drives. At the moment we have 15 engineers in product development, production engineering and quality control. As a professional manufacturer of gears and transmission products, we provide durable and reliable gearbox especially planetary gearbox. At the present, we produce NB3 series planetary gearbox, NB4 series track drives, NB6 series wheel drives, NB7 series selew drives. Planetary gearboxes installation, dimensions and performance are exactly interchangeable to well-known Eruopean and American brand planetary gearboxes.