Piston rod ensures long-term use of sealing effect

The structure of the piston rod is relatively simple, but the aspect ratio is relatively large, so it is a slender shaft part, but the rigidity is not very good. Therefore, in order to ensure its machining accuracy, when machining the piston rod, rough turning and finishing should be separated to prevent the workpiece from being deformed during the machining process.

Also note that a steady rest is used when threading both ends. The inner ring of the excavator shaft is a tight fit with the shaft, and the outer ring of the excavator bearing is loosely fitted with the housing. The excavator bearing can be press-fitted on the bearing first, and then the shaft together with the excavator bearing is loaded into the housing. In the process of press-fitting, a soft metal assembly sleeve is placed on the end face of the excavator bearing.

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