Hi Guys,
Please help me.
I’m trying to inset this face but things is not working as expected. After this inset i wanted to make this a circle. and extrude up.
Its not smooth 
I’m trying to achieve the number 4 image
Please give me tips… Thanks guys!
As you can see from the form of modeling, using boolean seems most appropriate.
If topological modeling is required, only a portion of the boolean modeling can be extracted, cleaned up, and rotated and replicated.
vxzv.blend (1.1 MB)
i thought when you say do boolean it means put a cylinder in the middle and do difference. never thougth of intersect method.
Enable the loop tools addon, it has a tool that normalizes the spacing between vertices in a loop.
Just select those faces in Edit mode, and Face>ShadeSmooth.
You can select them easily, setting the selection mode to ‘Face’, and Shit+Alt+Click over any vertical edge of those faces.
My example was just to show the principle of apossible way to do it… i didn’t want to recreate your exact shape… 
(and this was intersect too)
sorry bro i’m too noob to realize what you are doing
Nice first post @Umut_Islam_Falah! 
bro this is the best… so much going on in the modifier though… i just need to sit and analyze how you do the steps. but this is the one. thanks a lot.
bro when you get time. can you show me how did you put the circle to interact? thanks in advance.
In real life this slope would be done with a lathe machine… so when the inset methode also does make some interesting knob form… you want this equally slanted version.
So you may use a cone like object to “substract” (using boolean) this slope “onto” your object. Like some others now also has shown.
Yet another version (boolean + subd).
I’ve split the steps into different collections.
knob.blend (962.9 KB)
