Production or working drawings are specialized engineering drawings that provide information required to make the part or assembly of the final design. Working drawings rely on orthographic projection and many other graphical techniques to communicate design information for production. Though there is a common method for representing mechanical parts for production, many industries use specialized production drawings. In addition to standard mechanical drawings, two types of specialized drawings, piping drawings and welding drawings, are described in this chapter.

An engineered product typically will contain numerous parts. In addition to specialized parts, these products also contain many standard parts such as fasteners (e.g., screws, bolts, and pins) and mechanisms (e.g., gears, cams, and bearings). This chapter will explain the basic functionality of these standard parts and how they are represented in production drawings.

Working drawings are often derived from 3-D CAD models—both part models and assembly models—in today’s product design environments. In this chapter, you will learn about assembly CAD models and their relationship