About this 3D model

What it is A compact gauge to determine inner and outer radii/diameter, ranging from 1 to 20 mm. It also works well as a coaster. What to print There are multiple variants awaiting you: Central gauge version 1 measures from 1 to 10 mm in 0.5 mm increments ring gauges for round stock, drills, … from 1 to 10 mm in 1 mm increments, clearance designed is 0.1 mm Central gauge version 2 measures from 1 to 10 mm in 0.5 mm increments central hole (35mm) digits running cw/ccw like on the embracing gauge Central gauge version 3 measures from 1 to 10 mm in 0.5 mm increments central hole (26mm) bigger depressed digits & coloured edges Embracing gauge version 1 measures from 11 to 20 mm diameter in 1 mm increments 15° angular scale Embracing gauge version 2 measures from 11 to 20 mm diameter in 1 mm increments 15° angular scale huge depressed digits & coloured edges snap fit with central gauges Recommendable remixes If you want this design expanded to measure up to 40mm (or as coaster for a beer-keg?) DavidsGotWood got you covered here with a next size up embracing gauge. Stand alone variants 5mm thick no nesting but great to fidget with available here How to print Recommended for printing is a 0.4 mm nozzle and 0.2 mm layer height . Printing with a 0.6mm nozzle and Arachne activated is possible, as can be seen in the pictures above. A multi color version is just a matter of simple filament changes between layers. The digits on top differ in height by 0.2 mm which lets you print them in two colors. → The here orange depicted digits read the adjacent bulge diameter and are 0.2mm higher than the white ones, which read the adjacent inside curvature. Material at one's discretion, I used PETG in four different colors. What next There may be improvements and modifications based on feedback given here. If you prefer a smaller tool for the same task, my Diameter Worm may be a good choice. Measuring instead of gauging angles can be done with my printable Vernier bevel protractor . Mentions Credits to Archimedes of Syracuse, who absolutely died for circles and Carl Friedrich Gauß.