Partial Views In Engineering Technical Drawings

Partial Views In Engineering Technical Drawings

Technical drawings are very important documentations to show the engineering parts to mechanics, engineers, and other manufacturing operators. In terms of this, it is very important to show all the aspects of assemblies, manufactured parts, and structural parts. 

If you are a mechanical engineer, you need to know how to create and read technical drawing documentations. Mechanicalland provides lots of articles about technical drawing in engineering. 

Viewing parts in partial views in technical drawing documentation is a very important topic to know. We explained how to draw and read the partially viewed parts in a technical drawing.

Technical Drawing with Engineering Graphics

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What Is Partial View In Technical Drawing?

Partial views are extensively used in technical drawing documentation to make it easier to show the required details of parts. Most of the time, if you use partial views of a part, the place that is occupied by part will get shrink, and you can show more details about the part. 

In symmetrical parts, partial views can be essential to show the required details. Take a look at the example below. 

Image Source: Frederick E. Giesecke_ Alva E Mitchell, Henry C. Spencer, Ivan L Hill, John Thomas Dygdon, James E. Novak, R O Loving, Shawna Lockhart, Cindy Johnson – Technical Drawing with Engineering Graphics

As you see in the first part, the required details of the two sides of the part are shown with a partial view. If you take the top and left views, it will be very rigorous to fit the part on the page. 

In the second example above, the symmetrical part is cut along its centerline and cross-sectional details are shown effectively. If they took a left view of the part without cutting from the symmetry line, it will be very burdensome to fit all the detail into the technical drawing sheet. 

Breaks For Long Parts

If tubular parts or long parts must be shown on technical drawings but that section of a part is very long to place on the technical drawing sheet, you can use conventional breaks. You can break the long section from the middle to show it as much more short. You can see an example of the general use of breaks in technical drawing documentations. 

Image Source: Frederick E. Giesecke_ Alva E Mitchell, Henry C. Spencer, Ivan L Hill, John Thomas Dygdon, James E. Novak, R O Loving, Shawna Lockhart, Cindy Johnson – Technical Drawing with Engineering Graphics

Enlarged Details Of Partially Viewed Parts

Parts can be intricate to show all the required details with one view. Take a look at the example below. The part is partially viewed and hatch lines are showing the cut section. Types of these lines can change according to the material used. But 45 degrees of inclination is standard in mechanical engineering documentation. 

Image Source: Frederick E. Giesecke_ Alva E Mitchell, Henry C. Spencer, Ivan L Hill, John Thomas Dygdon, James E. Novak, R O Loving, Shawna Lockhart, Cindy Johnson – Technical Drawing with Engineering Graphics

In this cut section, lots of dimensional details are shown. And the cut section is shown as ‘SECTION A-A’. A-A is the name of the cutting line. You can see the counterbored hole in here. Additional dimensional details must be shown. To do it, extra enlarged detail is placed as a circle drawn with intermittent line. The line is named ‘B’. 

At the bottom, the ‘B’ is indicated as ‘DETAIL B’ and the magnification scale is indicated. You can show your additional details with a detailed view.

Conclusion 

These are the general characteristics of partial views in technical drawing sheets in mechanical engineering. 

Do not forget to leave your comments and questions below about the partial views in technical drawings!

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