CAD Forum discussion (EN) : Making an object narrower https://www.cadforum.cz/forum_en/ Tue, 21 Apr 2026 10:18:20 +0000 Sun, 16 Sep 2018 16:27:56 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://www.cadforum.cz/forum_en/RSS_post_feed.asp?TID=12948 <![CDATA[CAD Forum discussion (EN)]]> https://www.cadforum.cz/forum_en/forum_images/web_wiz_forums.png https://www.cadforum.cz/forum_en/ <![CDATA[Making an object narrower : Hello gergo77, if it&#039;s the...]]> https://www.cadforum.cz/forum_en/forum_posts.asp?TID=12948&PID=36375&title=making-an-object-narrower#36375 Author: philippe JOSEPH
Subject: 12948
Posted: 16.Sep.2018 at 16:27

Hello gergo77, if it's the internal diameter it will be  a "simple" material removal with the command SUBTRACT.
You create a cylinder of the desired internal diameter diameter, place it a the center of the initial cylinder and SUBRACT it from the initial.
When you use the command you will first clic on the cylinder that will stay then clic on the cylinder to be taken out.
If it's the external diameter it will be more difficult.
If the two "U" and "I" profiles are unioned with the cylinder it will be more difficult because you will have to "save" them appart before acting on the cylinder.
If they are not unioned with the cylinder just do a SUBTRACT on the cylinder with a sleeve with internal diameter = to the desired diameter and a larger external diameter the replace the two "U" and "I" profiles.
Then you will have to extent the two profiles against the external diameter of the cylinder, ask how if needed.  
Eventually see my AutoCAD file : 3D SOLIDS 01.dwg in the CAD/BIM Blocks library here in the site, it explains the basic 3D commands.



Edited by philippe JOSEPH - 16.Sep.2018 at 17:49]]> Sun, 16 Sep 2018 16:27:56 +0000 https://www.cadforum.cz/forum_en/forum_posts.asp?TID=12948&PID=36375&title=making-an-object-narrower#36375 <![CDATA[Making an object narrower : I have this object that I have...]]> https://www.cadforum.cz/forum_en/forum_posts.asp?TID=12948&PID=36374&title=making-an-object-narrower#36374 Author: gergo77
Subject: 12948
Posted: 16.Sep.2018 at 13:39


I have this object that I have to modify slightly. What command do I use to make the wall narrower?
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