Hopefully the screenshot and file can help explain this. I'm trying to extrude inside this curve for the bolt head. Obviously the curve is angled so the bolt head can't sit inside. This is a laser tube mount so the bolt can't be on the outside of this curve. I've tried to just create a sketch but when I click the plane it doesn't start at the curve.
There has to be a better way than what I did but I accomplished this by creating an offset plane from the backside and extruding a circle from it. The problem is I couldn't line up the inside circle perfectly with the one already created. I had to turn off snap and zoom in and go from there. Still open to better ideas.
Horizontal Offset Plane, at the centre of the hole.
Project > Intersect the hole wall, and sketch a rectangle for the head of the bolt on one side, and revolve cut the counterbore.
Might help.....
Another method to do these counterbore holes is to Extrude from an offset profile. The Screencast will explain.
John Hackney, Retired
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Correct, when starting from scratch. Cleaned up my file even more than this one to one hole command.
