Projecting Holes

Is there a way to project holes from one object to another?

Say you’ve drawn a rectangle, and ‘Pushed’ it so that it’s now a 3d object. Next I drew some holes in it, and then push/pulled them away. Now I draw another object on top of the first one. Now I want to project those holes up through the second object. I don’t want to redraw them on the top object, as this is more work and could lead to mistakes. I just want to be able to project them right through the second object, ensuring they’re in exactly the right place. I’ve been trying for hours, and searching the internet, but haven’t figured this out yet. Help would be very much appreciated…


So I’m assuming the first object with the holes is a group or component. Open that group or component for editing. Select the edges of the holes that are positioned against the new object. Hit Edit>Copy (Ctrl+C) to copy them to the clipboard. Next, close that component/group and open the other one if you’ve already made the second object a group or component. If you haven’t done that yet, there won’t be anything to open. Click Edit>Paste in place. This will paste the edges you copied onto the face of the neighboring component. Then Push away to make the new hole.

I use Paste in place so much I made a keyboard shortcut for it.

DaveR, you are undoubtedly a genius. I should have posted on here hours ago. Thanks a million:)

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Thank you.

I had a vaguely similar problem with projecting a hole today, and hit a wall trying to figure out what I’m doing wrong.

I have a cube with a concave surface on top of it. Basically it looks like a short section of tubing but cut to 1/4 off the circumference, forming a trough . It will be used in pairs to hold a round bar.

I need a hole from the bottom of the cube to the curved surface. I’ve done that with rectangles and squares but never from a flat surface to a concave surface. I tried pushing a circle up to the concave surface, then making an intersection but I can’t get a clean hole.

Ideas? Help?

You can extrude the hole up through the curved surface. Run it will past. Then select the curved surface and the side of the hole, right click and use Intersect Faces>With Selection. Then delete the extended part of the hole and the skin over the hole. The edge might look rough due to the way SketchUp represents circles and arcs with short line segments and curved surfaces with facets. You can reduce that rough appearance by using more segments in both the curve for surface and the circle for the hole but you have to be careful not to go overboard. It doesn’t take much to make decent looking holes.

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If this method doesn’t work for you I would suggest it may be a scale issue. If the object is too small SU can fail to for tiny edges and faces. Scale up and try again.

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Thanks DaveR & Box. Took me a couple of tries, apparently I had some junk left over from earlier attepts but when I rebuilt the circle anew it worked fine! I especially like the GIF, it really helps.

So now on to more stuff which will probably stump me again, but that’s how one learns!

New question, how does one add a picture to this topic?

Click on the seventh icon (Upload) above where you post

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