![A ring mandrel I designed for my micro lathe to help with sanding and finishing bentwood rings. : r/functionalprint A ring mandrel I designed for my micro lathe to help with sanding and finishing bentwood rings. : r/functionalprint](https://i.redd.it/hiftxw5nk1p61.jpg)
A ring mandrel I designed for my micro lathe to help with sanding and finishing bentwood rings. : r/functionalprint
![Ringmesser Messen, Ringstock Metall Ringmaß, Ring Sizer Messwerkzeug, Ring Mandrel Kostenlos Ringdorn Set, Ringe Modelle Größenwerkzeug für Herren Damen Schmuck - 4 Stück : Amazon.de: Fashion Ringmesser Messen, Ringstock Metall Ringmaß, Ring Sizer Messwerkzeug, Ring Mandrel Kostenlos Ringdorn Set, Ringe Modelle Größenwerkzeug für Herren Damen Schmuck - 4 Stück : Amazon.de: Fashion](https://m.media-amazon.com/images/I/71fPDLuZjGS._AC_UY1000_.jpg)
Ringmesser Messen, Ringstock Metall Ringmaß, Ring Sizer Messwerkzeug, Ring Mandrel Kostenlos Ringdorn Set, Ringe Modelle Größenwerkzeug für Herren Damen Schmuck - 4 Stück : Amazon.de: Fashion
![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)
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
![Durston PrecisionFit 3-Way Set of Steel Ring Mandrel, Aluminum Ring Stick & Ring Finger Sizers-USA Sizes | OttoFrei.com — Otto Frei Durston PrecisionFit 3-Way Set of Steel Ring Mandrel, Aluminum Ring Stick & Ring Finger Sizers-USA Sizes | OttoFrei.com — Otto Frei](http://www.ottofrei.com/cdn/shop/files/durston-precisionfit-3-way-set-of-steel-ring-mandrel-aluminum-ring-stick-and-ring-finger-sizers-usa-sizes-otto-frei.jpg?v=1686179166)