Moving into the Assembly World - Autodesk Inventor 2010: No Experience Required - page 132

12. Start the Hole tool. Notice that no points are selected automatically,
because you didn't defi ne them as hole centers.
13. Pick the three endpoints, as shown in the preview in Figure 3.22.
14. Make the hole a Countersink type, set Termination to Through All,
select the Direction option next to Termination to reverse the direc-
tion, and make it a Clearance Hole for a 100° fl at-head machine
screw, as shown in Figure 3.22.
All the characteristics of the hole are automatically entered into
the dialog box based on the standard you select. That's a lot easier
than looking everything up on a hole chart.
FIGURE 3.21 The finished sketch
15. Click OK to place the three holes.
16. Switch to the fl at pattern to see that the holes have been added. Then,
return to the folded model.
17. Save your work.