Understanding Industrial Blueprints 173
7.2 INDUSTRIAL DRAWINGS.
A working drawing is a drawing that includes all the information required to successfully and accurately
execute a job. A detail drawing is essentially a working drawing that incorporates much more specific in-
formation including the size and shape of the project, the materials to be used, finishing information, and
degree of accuracy needed. An assembly drawing, on the other hand, may incorporate very little detail
(Figure 7.10). The purpose of this type of technical drawing is mainly to show how the machine is to be
assembled.
There are several types of detail drawings used in various industrial settings. They convey the infor-
mation and instructions for manufacturing the part, including the object’s shape, size, and specifications.
The detail drawing should provide all the information needed to produce the particular part (Figure 7.11).
In addition to the part production, the detail drawing can be used when bidding a job or as a master draw-
ing from which other drawings are produced. The information on a detail drawing is specific to the part
to be produced, typically drawn one part per page or sheet. Included in the information should be the
pertinent shape, size, specifications, and notes. The notes and/or title-block information would normally
include the scale, tolerances, surface texture, and specified material. Other data may be required that
stipulate finish specification, moisture contents, color code, and other specifications requested by the
customer.
Figure 7.9C Examples of finish marks on a drawing.