JGX series gearbox reducer is mainly used for high-efficiency roller mill in cement production line.JGX series gearbox is a planet transmission unit of two-stage. It is dvided in 16 types in accordance with transmission power, 5 nominal reduction ratios for each type, and the range of output torque is 34-700KN.m. It can meet the requirements of various types of roller mill. JGX series reducerwas approved as standard product for construction material industry by Technical Standardization Commission. Two-stage planet wheel and sun wheel have been case-hardened and precisely ground. The tooth flank of inner rim of two-stage hasbeen nitrided. It's strength meets the application requirement. Adopting the sun wheel or floating planet holder for the equal loading of two-stage planet transmission. Adopting of locking disc type output coupling, makes easy to use and reliable. Suspending installation protects the roller mill from overloading. Forced lubrication for lubricating points with supervision,make it safe and reliable. High efficiency, low noise and smooth running.