In deciding on a knob, I once again decided to make my own. i had an idea of what i wanted. So i took a piece of 1″ brass rod. Put it in the wood lath and drilled and tapped it for a 5/16″ thread with a 5/16″ tap.
Next i drew out some even lines. Start with a line on each side, and keep marking half. You’ll get as even as your eye can determine.
Next, I put a chamfer on it. I like the looks, but it also does something else. It will give you a reference line to cut your groove to.
For this one I used a dremel to with a Dremel EZ406-02 1 1/2-Inch EZ Lock Rotary Tool Cut-Off Wheel and Mandrel
Next one I’ll try cutting them on the band saw.
I use J B Weld to secure the threads to the brass