What is the known accuracy of the processing equipment?

Dimensional accuracy, roughness accuracy or grade accuracy of form and position tolerance can be controlled within 0.065438 0 mm, roughness 65438 0.6 mm, and form and position tolerances such as coaxiality, concentricity, runout and straightness. The guarantee scope of flatness and verticality is as follows:

The accuracy of the excircle is 0.065438 0.

The cylindricity of the excircle is 0.01100.

End flatness 0.02/200

The pitch accuracy is 0.06/300.

Usually, the machining accuracy mainly refers to four points:

1, dimensional tolerance

2, shape tolerance

3, position tolerance

4, surface smoothness (as for other maximum physical size flow is actually a concept that has only appeared in recent years.

The highest machining accuracy and numerical control accuracy of ordinary lathe are higher, but this is not absolute. For example, the tolerance of external circle is 0.0 1-0.02 mm, which can also be achieved by ordinary lathe. In addition to the exact size of the excircle, it also depends on the requirements of the drawing for the excircle finish. For example, if the tolerance of the excircle is 0.0 1-0.02 mm and the finish is 1.6-3.2, then you can choose an ordinary lathe or a CNC lathe, but the finish is above 0.8, so you have to choose a lathe and a grinder for processing. Sometimes drawings require dimensional tolerance between 0.0 1-0.05. You can choose lathe, CNC, milling machine and machining center. But if the requirements of coaxiality, verticality and parallelism are high, grinder or other machine tools should be considered.