| This tutorial was submitted by Mike Nelson |
| We had a part recently that we couldn’t dimension in a satisfactory way. As part of another exercise I stumbled on a solution to the problem. Below is a description of how we managed the dimensioning. This dimensioning method seems to be undocumented. |
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The part in question has an internal tapered feature created by an angled shape revolved less than 360°. The creator couldn’t find a way of placing dimensions on the drawing cross section to enable the part to be made. The support desk was unable to help with a workaround. The tapered conical faces are the ones shaded in red in the picture à |
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What was wanted was an angular dimension for the top and the bottom conical features. None of our attempts to place an angular dimension worked and there is not the possibility to access the design sketch dimensions. |
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What we did was to use the Diameter dimension tool |
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Then by selecting the feature circled in red we could place the angled dimension as shown. Note that the dimension assumes that the feature is a complete circle. What we actually wanted was the angle between the angled edge and the component centreline. |
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Select the centreline and the leader line for the 31.2° dimension (the ones with the red cross in the picture à You should now be able to place the actual dimension wanted (15.6° in this example) |
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The 31.2° dimension can now be deleted leaving the 15.6° dimension |
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Then add the angular dimension between
the part centreline and the edge of the conical feature. Use the
angle dimension tool 
| Repeat the process for the lower conical feature and the dimension is complete. I tweaked the dimension to get it the right side of the line and it looks best when horizontal. |  |
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