CAD Challenge- RINGS

CAD CHALLENGE- TO DESIGN A RING THAT FITS ONE OF YOUR FINGERS!!

Bonus: add a cool design!

Tinkercad ring sizes are based on millimeter (mm) diameters, so precise measurements are required for 3D modeling. Common practice involves using a cylinder or tube tool with an inner diameter matching your size (e.g., 18-20 mm for average rings), adding a 1–2 mm wall thickness, and adding a 1mm printing tolerance for a proper fit.

This video shows how to customize your workspace units to millimeters for accurate modeling:

YouTube

Key Tinkercad Ring Sizing Tips:

• Measurement: Use an inner diameter in millimeters (mm) for the cylinder that will become your hole.
• Default Size: A common starting point is to use a 20.2 mm or 20.5 mm inner diameter for a standard size 10 ring, depending on the printer.
• Ring Component: Use the "Torus" or "Tube" basic shape, setting the diameter to the desired finger size, plus wall thickness.
• Tolerance: Add a small gap (approx. 1 mm) for 3D printing, especially if the ring is thick, to ensure it fits.
• Tool Setup: Use the HLModtech Ring Sizer on Tinkercad for quick reference.

Sizing Table:

• Size 6: 16.5 mm
• Size 7: 17.3 mm
• Size 8: 18.1 mm
• Size 9: 18.9 mm
• Size 10: 19.8 mm
• Size 11: 20.6 mm

3d printed Ring Sizes on Thingiverse- I have printed these and have them on my desk, so you know what size ring a certain finger wears.

Designing the Ring:

1. Drag a cylinder (set as a "hole") to the desired diameter.
2. Add a second cylinder (solid) with a 2-3mm larger diameter to create the ring thickness.
3. Use the "Align" tool to center both shapes.
4. Group the objects to create the final, sized ring.
5. Export as .STL for printing.