Changzhou Zhongke Gearboxes Manufacturer Co.,LTD is a professional hard tooth surface gearbox manufacturer for plastic and rubber extruder machine. We offer various kinds of gear boxes. Followings: •ZLYJ series gearboxes for single screw extrusion machinery •Horizontal ZLYJ gearbox •Vertical ZLYJ gearbox •SZ series gearboxes for conical twin screw extrusion machinery •Planetary gearbox •R series helical gear reducer •S series worm gear reducer •K series spiral bevel gear reducer •F series parallel shaft helical gear reducer •Various customized non-standard gearbox •Spare parts for the power transmission The company is well-equipped and have strong technical force. For examples, it constantly bring in advanced production equipment and processing technology, with CNC hobbing machine, CNC grinding machine, heat treatment equipment, gear testing center and other advanced processing and testing equipment.