In normal use, the precision piston rod is subjected to alternating loads, and there is a sealing device at φ to rub its surface back and forth, so it requires high hardness and wear resistance. The precision piston rod is made of high-quality materials. After the φ part is quenched and tempered and the surface is nitrided, the hardness of the core is 62~65HRC. In this way, the piston rod has both toughness and good wear resistance.
The structure of the precision piston rod is relatively simple, but the length-to-diameter ratio is large. It belongs to the slender shaft part and has poor rigidity. The frame is used to reduce the deformation of the workpiece during processing, and the frame should be used when processing the threads at both ends.
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