In the stage of moving onto the detailed parts drawing from the assembly drawing, it is necessary to make the parts shape design as easy as possible to assemble. This section introduces points on designing easy-to-assemble components.

• The machine used for assembly parts can guarantee the machining precision of approximately ±0.1 to 0.2mm even as the general tolerance. Therefore, it is possible to design easy-to-assemble components by altering their shapes without providing a dimensional tolerance.
• [Fig.1] illustrates an example of easy-to-assemble components designed with the assembly guides in order to ensure the parallel precision of the two components. If you stack and assemble two sets of this component, the assembled components will have the better precision in the vertical direction as well. For details, see #46.

• [Fig.2] is an example of the assembly guide parts drawing (workpiece holder) using locating pins. This is a case example of the parts requiring the assembly precision to keep the workpiece in place.
• In this case, two of the four fixing screw holes can be used as a guide hole of the locating pins.