![Amazon.com: Expanding Stainless Steel Ring Mandrel for Ring Turning and Ring Making. (Full Set) : Arts, Crafts & Sewing Amazon.com: Expanding Stainless Steel Ring Mandrel for Ring Turning and Ring Making. (Full Set) : Arts, Crafts & Sewing](https://m.media-amazon.com/images/I/61gfQspQg2L._AC_UF894,1000_QL80_.jpg)
Amazon.com: Expanding Stainless Steel Ring Mandrel for Ring Turning and Ring Making. (Full Set) : Arts, Crafts & Sewing
![Amazon.com: Expanding Ring Mandrel with Hex Allen Key – Set of 3 Premium Steel Ring Mandrels for Lathe – Heavy Duty Ring Shaper Tool for Ring Turning and Ring Making – Ring Amazon.com: Expanding Ring Mandrel with Hex Allen Key – Set of 3 Premium Steel Ring Mandrels for Lathe – Heavy Duty Ring Shaper Tool for Ring Turning and Ring Making – Ring](https://m.media-amazon.com/images/I/81ou2msewBL.jpg)
Amazon.com: Expanding Ring Mandrel with Hex Allen Key – Set of 3 Premium Steel Ring Mandrels for Lathe – Heavy Duty Ring Shaper Tool for Ring Turning and Ring Making – Ring
![This might be a dumb question, but I'm new to machining. I'm trying to recreate this expanding ring mandrel. How do I machine the inside hole where the screw goes to make This might be a dumb question, but I'm new to machining. I'm trying to recreate this expanding ring mandrel. How do I machine the inside hole where the screw goes to make](https://preview.redd.it/wvb2b4ya5gv71.png?auto=webp&s=228e9cc6d782b0fdd8b21004d241dd1c28aec64d)