Cone tolerance (1)

1. What are the main contents of GB11334-89 "Cone Tolerance"? A: GB11334-89 is the first national standard issued in China. Before this, the standard JB1—59 “taper tolerance” was adopted. The national standard mainly specifies 13 terms and definitions such as conical tolerance. The project of conical tolerance and the given method, the determination of the conical tolerance value, the maximum conical angle error that can be limited by the conical diameter tolerance (appendix) and the annotation of the conical diameter tolerance (Appendix) and other content. The national standard is equivalently adopted by the international standard ISO1947-1973.

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