hackster. io Key chain

Project Description

This project demonstrates how to create a personalized 3D-printed keychain from an ordinary image using Tinkercad. The process starts by selecting an image and converting it into an SVG file. The SVG is then imported into Tinkercad, where it can be resized, edited, and customized according to the required design.

A keyring hole is added to the model, and the final design is prepared for 3D printing. The completed model is exported as an STL file and sliced using 3D-printing software before being printed using PLA filament.

This project provides a simple workflow for creating customized keychains featuring logos, names, icons, artwork, or other images. It is suitable for beginners, makers, students, gifts, events, and small-scale 3D-printing projects.

1. Select the Image

Choose the image, logo, icon, name, or design you want to convert into a keychain.

Tips:

• Use a high-contrast image.
• Simple shapes work best.
• Avoid very small details.

2. Convert Image to SVG

Convert the selected image into an SVG (Scalable Vector Graphics) file.

The SVG format is useful because it can be imported into Tinkercad as a 3D shape.

Workflow:

Image → SVG → Tinkercad

3. Open Tinkercad

Open Tinkercad and create a new 3D design.

Set the workspace dimensions according to your required keychain size.

4. Import the SVG

Use:

Import → SVG → Select SVG File

Import the converted SVG into the Tinkercad workspace.

After importing, adjust:

• Length
• Width
• Height
• Scale
• Position

5. Create the Keychain Body

Use the imported SVG as the main design.

Adjust the thickness so that the final keychain is strong enough for everyday use.

A practical starting point is around 3–5 mm total thickness, depending on the design.

6. Add the Keyring Hole

Create a small cylinder and set it to Hole in Tinkercad.

Place it near one edge of the keychain.

Example:

Hole diameter: 14 mm

• Keep sufficient material around the hole so it doesn't break easily.

Then select the keychain and hole and click Group.

7. Check the Final Model

Before exporting, check:

• No unwanted gaps
• Keyring hole is open
• Design is connected
• Minimum features are printable
• Correct overall dimensions

8. Export the STL

Select the finished model and export it as an STL file.

The STL can then be opened in your preferred slicer.

9. Slice the Model

Open the STL in a slicer such as Ultimaker Cura or your printer manufacturer's slicer.

Suggested starting settings:

Setting Suggested Value

• Material PLA
• Layer Height 10 mm
• Infill 15–30%
• Walls 3–4
• Supports Usually not required
• Nozzle 0.4 mm

Adjust these settings according to your printer and design.

10. 3D Print

Load the filament, level/calibrate the printer if required, and start the print.

After printing:

• Remove the keychain from the bed.
• Remove any unwanted material.
• Check the keyring hole.
• Add a keyring.
• Test the strength.