Putting Things in Place with Assemblies - Inventor 2013 and Inventor LT 2013 Essentials - page 104

FIGURE 4.6 Complexity in a constraint also adds reliability and stability.

6. For the third, click the cylindrical face of the hole in the purple part.

7. Click OK to complete constraining of the purple part. The purple part
can no longer rotate freely around the axis of the hole. This constraint
is a great option for aligning faces that aren't flush on all sides.

A good use for an
Inside solution could
be a pin following
a curved face. An
Outside could be
rollers in contact
with each other.

The Tangent Constraint

When rounded faces need to stay in contact with other rounded faces, the Tangent
constraint is often the only tool you will need. The constraint can have Inside or
Outside solutions.

1. Verify that the 2013 Essentials project file is active and then open the
c04-05.iam file from the Assemblies\Chapter​4 folder.

2. Launch the Constrain tool from the Assemble tab in the Position
panel or the marking menu.

3. Set Constraint Type to Tangent, and make sure the solution type is
set to Outside.

4. Make your first selection, the blue, curved face on the orange part.

5. Make the second selection, the blue face on the gray part.