How to change the inner diameter of a ring, with hundreds of sketches around it?
The last file was empty. The first file can be done with two sketches. One sketch with the inner and outer wall circles and one rectangle for the cut outs.
Extrude the walls including the portion of the rectangle inside the walls. Extrude the bottom by selecting all of the geometry between the walls. Repeat for the top (In the Extrude command, select the top of the walls as the Start/Object).
Create a plane using a formula so the distance equals the radius of the outer circle. Create the second sketch and draw the circle for the hose fitting opening. Create the circle at 1/2 the wall height from the Origin (Use a formula so when you change the wall height the hole will move with it.) Extrude the circle. Note: This will place the hose fitting directly opposite one of the rectangular openings. If you don't want it there, you can put a point in the first sketch on the outer circle where you want the hose fitting. Use Plane Tangent to Face at Point to create the plane.
Use a joint to position the hose fitting to the hole. Use Split Body command to trim the hose fitting using the top and bottom face of the main body.
p.s. In Preferences turn off all Auto Project items. Dimension and Constrain all geometry. Use Joints to position components instead of Move or Align.
ETFrench
