I am crafting my own drill powered lathe so I can improve my ring making. The problem is, even though I can make a working lathe, I do not have a way to securely place the ring in the lathe to make it fit snug like I could with an expanding ring mandrel. The expanding ring mandrel does not fit inside of my current drill so I have to use alternative methods. I like crafting things with my own hands, and this ring mandrel is just another step in the fun process of starting a new hobby. Anyone have any ideas on how I can make this work? My drill can open it's jaws up to 1/3" I believe.
Video for reference on how I will create my lathe. https://youtu.be/KmpdEtvVRfI
How an expanding mandrel works. 7:08 https://youtu.be/iiFIfKikJRM?t=428