Rounding gauge key ring

Roundness gauge keychain for radius from 1 to 12 mm, with or without a magnet, in double or single ring

4 versions:

1- Basic (without magnet and single ring)
Basic.stl

2- Double ring
DoubleRing.stl

3- Magnet 5 mm diameter by 10 mm long
Magnet 5mm.stl

4- Magnet 10 mm diameter by 10 mm long
Magnet 10mm.stl

Individual files:
1-8.STL
2-12.STL
2-12 Ring.STL
2-12 Magnet 5mm.STL
1-8 magnet 10mm.STL
2-12- magnet 10mm.STL

If you want to use shorter magnets, print a 5 or 10 mm diameter cylinder of the desired length; the holes in the part are 5.2 mm and 10.2 mm respectively, for a tight fit

The filament change for the lettering is done on the last 3 layers for a 0.20mm print, 4 layers in 0.15mm, and 6 layers in 0.10mm

Assembly to be glued with super glue or other strong glue for PLA or PETG

Magnet to be provided is 10 mm long, 5 mm or 10 mm in diameter, and according to the version.
Glue the two parts together first, and after drying, glue the magnet

The central hole can be left empty, or a metallic object can be trapped within it and attracted by the magnet, or a non-metallic object can move freely inside

Good print