Tz in mechanical drawing refers to copper drill. In mechanical drawing, tz is generally used to represent a cylindrical copper drill, which is usually used to drill holes. These copper drills play a vital role in the machining process, and their shapes, sizes and materials will affect the quality and accuracy of machined parts.

Tz Besides copper diamonds, there is other meaning. In some mechanical drawings, tz may also represent Tianzheng Company, which is a company specializing in mechanical software development. The company mainly produces CAD software and other mechanical design tools, which are widely used in the field of mechanical drawing.

In mechanical drawing, tz may also be related to feature size. Feature size refers to the most important and basic size requirement in a part, which is usually marked at the top of the part drawing. According to the standard, if the feature size in the drawing is tz, it means that the feature size of the part is the diameter of the hole. Therefore, in the process of mechanical drawing, it is very important to accurately understand and mark the meaning of tz.