Why Is CNC Lathe Processing Drawings Important

CNC lathe processing is a high-precision, high-efficiency machine tool with digital information control system and tool displacement. Numerical control lathes are an effective way to solve the problems of aerospace product parts such as many varieties, small batches, complex structures, high precision, and high degree of automation.

CNC lathe machining is a high-tech machining method used for precision hardware parts. Various types of materials can be processed, such as 316, 304 stainless steel, carbon steel, zinc alloy, alloy steel, titanium alloy, alloy aluminum, iron, copper, plastics and other raw materials. CNC lathes can also be processed into complex square and circular combinations. Structural parts.

Why is CNC lathe processing drawings still important?

Usually, when the 3D CAD model to be processed by the CNC lathe includes the following content, the CNC lathe processing drawings will convey very important information:

1. Thread (threads can be internal or external, usually can be put together)

2. Tolerances with characteristics exceed the standard

3. A single surface with specific surface treatment requirements (surface roughness, etc.)


The above requirements cannot be communicated in the 3D CAD file. Even if the design does not include the above content, it is usually recommended that the operator use the 3D CAD file together with the CNC lathe processing drawings when placing the CNC order. Generally, 3D CAD files are used to program CNC machine tools, and graphics are used as references throughout the machining process. Most operators can also manufacture parts directly from CNC lathe processing drawings. They usually prefer them to 3D CAD files because they have rich experience in CNC lathe processing and can quickly explain the geometry and recognition of parts from 2D drawings. The main dimensions, functions and key features of the part are easier and easier to evaluate the manufacturing cost of the part.


A typical CNC lathe processing drawing paper includes the following parts: title bar, isometric/picture view of the part, main orthogonal view of the part, section view or partial view.

The title bar of the CNC lathe processing drawing should contain the basic information about the part, such as the part name, material, surface treatment and color requirements and so on. It is important to fill in this basic information because they inform the operator of the function of the part. The title bar also contains other technical information, such as the scale of CNC lathe processing drawings, and standards for dimensioning and tolerances. It is recommended to add one or more 3D graphics views of the part to the drawing, because in this way, the drawing is clear at a glance.

Most information about the geometry of the part is conveyed in the main orthographic view. It is a two-dimensional depiction of a three-dimensional object, representing the exact shape of the part, viewed from one side of the bounding box at a time. Only draw the edges of the part in this way to communicate size and features more clearly. For most parts, two or three orthogonal views are sufficient to accurately describe the entire geometry.

The section view can be used to show the internal details of the part. The cut line in the main orthographic view shows the cross-section of the part, while the hatch pattern in the section view represents the area where the material has been removed. CNC lathe processing drawings can have multiple profile views, where two letters connect each cutting line with each profile view (for example, AA, BB, etc.). The arrow of the cutting line indicates the direction we are looking.

Partial views are used to highlight complex areas of the main orthogonal view or areas that are difficult to size. They are usually circular (placed offset to avoid confusion) and annotated with a single letter that links the detailed view with the main graphic (e.g. A, B, etc.).