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5. The resulting cut is not visible on the outside of the part. A cross-section shows the body of the part cross-hatched with the area representing the teeth blank. The cross-section shows the correct root diameter and outside diameter, regardless of where the section is cut.
6. An assembly cross-section clearly shows the mesh of two mating gears and splines without cluttering the drawing.
1. Start with the generic part.
2. Suppress the simple representation of the teeth named GEAR_SIMPLE.
3. Create and pattern the detailed tooth geometry. Group the features used to create the detailed tooth geometry and name this group GEAR_DETAILED.
4. Create a family table by adding the feature GEAR_DETAIL.
5. Suppress GEAR_DETAIL and resume GEAR_SIMPLE.
6. Add that feature to the family table.
7. Edit the family table.
8. Create an instance named R12345_TEETH. For the instance, the GEAR_DETAIL is Y and the GEAR_SIMPLE is N.
9. Store the generic part with GEAR_DETAIL suppressed and GEAR_SIMPLE resumed.
Each higher-level assembly can now have an INSTANCE named _TEETH by adding each gear to a family table and choosing TOOLS + REPLACE USING + FAMILY MEMBER.
You can now use the appropriate instance effortlessly in drawings ( _TEETH for Isometric view, GENERIC for cross-section view) , in assemblies (GENERIC for cross-section views and to open large assemblies), and in parts catalogs ( _TEETH to show a detailed view of the gear).
Save the doughnuts for breakfast! 
Jill A. Marshall is senior modeler in Drivetrain Engineering at the John Deere Product Engineering Center in Waterloo, Iowa, USA. She can be reached by e-mail at MarshallJillA@JohnDeere.com.
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