This is my simple quick way of making knobs.
I cut out a round with a hole saw in my drill press.
Then ... (see photo collage below from Left to right, top to bottom)

* I use a hex bolt and chisel out a recess. Then tap in the hex head into the recess so the underside sits flush to knob's bottom. After checking the fit, I remove and epoxy in the bolt.

* Next I plug the hole left by the hole saw.

* Then I flush saw off any protruding dowel.

* Next, I clean up with a chisel.

* After the epoxy has dried, I chuck up the assembled knob in my drill press and smooth out with a rasp.

* While still in the drill press, I smooth it with various sandpaper and it's ready.

 

 

The finished knob!

 

 

Thanks for looking! 
Cheers! 
MrRick

Edited October 20, 2025Oct 20 by MrRick

Cool idea! Thanks!

You're welcome lew!

Way behind on my reading. Thanks Rick.

You're welcome Grandpadave52!