The inner ring bearing at the driving end of a hydraulic turbine factory in Chongqing needs to be pressed three times with a total of 6 jacks of 50 tons. The process acceptance requirements are high and the requirements are good. The 6-synchronous hydraulic jacking system provided by our company has good durability, can jog and operate automatically. Each oil cylinder can be controlled independently. The customer bought one set three years ago, and bought another two sets this year.