What Is The Meaning Of The Outer Diameter Tolerance Of The Round Chrome Bar And The Analysis Of The Problem?

- Jul 13, 2019-

What is the meaning of the outer diameter tolerance of the round chrome bar and the analysis of the problem:


1. If the cylinder rod is 40, the cylinder diameter is 50, and the cylinder stroke is 1480, then which one should be used on the piston rod material?

 

If the cylinder rod is 40, the cylinder diameter is 50, and the cylinder stroke is 1480, then 40cr should be used on the piston rod material. If it does not bear the lateral force, it should be tempered. If it is subject to lateral forces, it can only be considered and selected.

 

2. What is the piston rod whose outer diameter tolerance is f7-f8?

 

If the outer diameter tolerance of the piston rod is f7-f8, then the outer diameter tolerance of the piston rod is indicated, and the f7 or f8 level can be selected. Where f is the tolerance of the shaft, ie the position of the tolerance zone, and the number is the tolerance class. As for the value of the bias value, it is necessary to look up the table according to the diameter of the piston rod. In turn, to get accurate numbers, the electric flat car can also avoid mistakes.

 

3. In the cylinder, the piston rod and the cylinder tube are generally why? And, what is the reason for the longitudinal scratch on the piston rod?

 

In the cylinder, the cooperation between the piston rod and the cylinder tube is mainly for the clearance fit, and the piston ring mainly serves as a sealing function. As for the longitudinal scratches on the piston rod, it is caused by particulate impurities in the cylinder hydraulic oil. And, it can be used to judge the quality of the chrome plating on the surface of the piston rod, and then determine whether it is related to the quality of chrome plating.

 

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