In the past, China did not have the national standard of “cone tolerance and cooperationâ€. In order to meet the growing needs of mechanical manufacturing, we ensure the interchange, matching and improvement of product quality of conical joints in recent years. Has issued GB157-89 "taper and cone angle series", GB4096-83 "angle and angle series of prisms", GB11334-89 "cone tolerance", GB11335-89 "limit deviation of the tolerance angle", GB1236 -90 "Cone Matching" and other five national standards, in order to promote the implementation of the new national standard, we will introduce in a question and answer format.
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