Help with solids...

[iamstd2]

I am working on the attached file. I need to either subtract or surface trim the corners of the cylinder but when I try to do either some other surfaces that i did not select get trimmed. How do i solve this problem? 6.dwg

[nestly]

I'm not exactly sure what the part is supposed to look like, so I guessed. This may not be what you're looking for, but I used your existing geometry to create 2D top view of that part using the FLATSHOT command, then used PRESSPULL to extrude the hub, and then the "flange", which I believe is the easiest way to make that part.

Here's a video demonstration. --> http://www.screencast.com/t/rkrbuhFOQ

If you still need assistance trimming solids, we can certainly help with that as well, but the model you posted didn't actually contain any solids.

[SLW210]

I moved this to the AutoCAD 3D Modelling & Rendering forum.

Like nestly stated, you have NO solids, just regions, surfaces and lines.

What are the end results you want?

[iamstd2]

Thank you Nestly. That is exactly what I needed to do. I have not yet explored the FLATSHOT command, which may be why I was having trouble.

[nestly]

Thank you Nestly. That is exactly what I needed to do. I have not yet explored the FLATSHOT command, which may be why I was having trouble.

Actually, I only used the FLATSHOT command to get the geometry back to 2D. If I was starting from scratch and had the dimensions, I'd just have drawn it in 2D, then used EXTRUDE twice to make the part(s) into a solid.