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1. Select Parametric Part Manager.
2. Use a selection window to select all of the objects.
   
3. The Selection Info palette opens, and the part is temporarily called "Part Candidate." Expand this item to see what the part contains.
   
4. The parameters H1 and H2 are for the two internal circles. Highlight the first Circle in the palette.
   
   The circle is also highlighted on the model.
   
5. The radius of this circle is found under "Metrics," at the bottom of the palette. Right-click on the Radius field.
   
6. Enter the parameter name "H1," then click OK.
   
   

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   Note: You are not restricted to defining only geometric parameters. You can also define material, pen color, line width, etc. as parameters.

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7. Next, highlight the other Circle.
   
   The other circle is now highlighted on the model.
   
8. Right-click on the Radius field.
   
9. Enter the parameter name "H2."
   
10. For the next parameter, highlight the Radial Dimension.
    
    The dimension of the polyline arc is now highlighted.
    
11. The value Value field of this dimension is found under "Constraints." Right-click on this field.
    
12. Name this parameter "R."
    
13. Next is the Linear Dimension.
    
14. This value is also found under "Constraints." Name its parameter "W."
    
15. The last parameter is the depth of the part. Highlight "Simple Extrude."
    
16. This parameter is called "Height" and is found under "Simple Extrude." Right-click on this field.
    
17. Name this last parameter "D."
    
18. Now that all five parameters are defined, select Finish from the local menu or Inspector Bar.
    
    

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    Note: There are other options in the local menu and Inspector Bar. Relocate Reference Point enables you to define the point by which the part will be inserted. For circular parts, Set Assembly Axis can be used to set an axis for assembly using Assemble by Axis (see Assemble by Axis).

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1. The Parametric Part window is now open, in which you can define relationships between the parameters you've defined. First, enter a name for the part.
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   The eventual part will be defined by only three parameters: the hole radius, distance between hole centers, and depth. All other parameters will be functions of these three.
2. The names of the parameters currently listed don't tell the user exactly what they are for, so we can add parameters with more obvious names. To do this, right-click on the first parameter on the list, and select Insert Parameter.
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3. Name this parameter "HoleRad."
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4. "HoleRad" is now first parameter on the list. Under "Value," enter the default radius that will be used when you first insert the part.
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5. Under "Type," specify "Linear."
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6. Create another parameter for the center-to-center distance between the holes. This parameter can be named "CenToCen." Specify an initial "Value" and "Type."
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7. "H1" and "H2" will be have the same value as "HoleRad," and therefore do not need to be displayed as parameters you can edit when inserting the part. So for "H1," uncheck the box under "Visible."
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9. Under "Value" next to "H1," replace the number with "HoleRad."
   Image Removed Do the same for "H2."
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10. Make Define"R" invisible as well, and define its value as  as twice the hole radius.
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11. Make Set "W" invisible, and set its value  as equal to "CenToCen."
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12. Now the three controling parameters needed for the part are defined. They are "HoleRad," "CenToCen," and "D." Click OK Click Finish to close the Parametric Part window.

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