How to 3D Print a Keychain Step-by-Step
Designing and printing your own custom keychain is one of the easiest and most satisfying projects to get started with in 3D printing. Whether you’re doing it for fun, gifting, branding, or learning, a 3D-printed keychain is a great beginner project that uses very little material and allows for endless personalisation.
In this detailed guide, we’ll walk you through each step – from selecting or creating a keychain design to choosing filament, slicing, printing, and finishing.
Step 1: Choose or Create a Keychain Design
You have two options:
Download a ready-made STL file:
- Visit platforms like Thingiverse, Printables, or TrinityLayers Free Designs Library
- Search for terms like “keychain,” “custom name keychain,” “logo keychain,” etc.
Design your own:
Use beginner-friendly software like:
- Tinkercad (free, browser-based)
- Fusion 360 (advanced option)
- Canva + 3D builder for basic shapes and text
Need help with custom keychain design? Submit your idea
Step 2: Prepare the 3D File for Printing
Once you have the STL file:
- Open a slicer software like Ultimaker Cura, PrusaSlicer, or Bambu Studio
- Load the STL file
- Scale the size to around 30–60mm (standard keychain size)
- Set layer height: 0.2mm (standard resolution)
- Infill: 20–30%
- No supports needed unless your design has overhangs
Need help setting up your slicer? Contact TrinityLayers Setup Help
Step 3: Choose Your Filament and Printer
Best filament for keychains:
- PLA: Easy to print, good detail
- TPU: Flexible keychains
- PETG: More durable and heat-resistant
Top beginner-friendly printers:
- Creality Ender 3 V3 SE – Buy on Amazon
- Bambu Lab A1 Mini Combo – Explore this Smart Printer
Step 4: Start the Print
- Preheat the nozzle and bed (PLA: 200°C nozzle / 60°C bed)
- Insert filament
- Upload the G-code via SD card or USB
- Watch the first few layers carefully to ensure proper adhesion
Print time for a keychain typically ranges from 30 minutes to 2 hours, depending on size and detail.
Need custom TPU or PETG prints? Upload your design
Step 5: Post-Processing
- Gently remove the print from the bed
- Trim excess filament using a cutter or fine sandpaper
- Optionally paint or polish for a professional finish
- Add a keyring or chain
Explore 3D printed gifts and accessories here
Cost Breakdown
| Item | Approximate Cost |
|---|---|
| PLA Filament (1 keychain) | ₹5 – ₹10 |
| Electricity (1 hour print) | ₹2 – ₹3 |
| Printer Maintenance (avg.) | ₹1 – ₹2 |
| Total Cost per keychain | ₹8 – ₹15 |
Bulk orders and TPU printing may cost more depending on the finish and size.
Example Scenarios
- Gifting: Print personalised name keychains for birthdays
- Branding: Add your logo and hand them out at events
- Learning: Use keychain projects to practice basic modelling and slicing
- Side Hustle: Start a small shop selling keychains on Etsy or Amazon Handmade
Sell your 3D printed products with TrinityLayers
Value Tiers
| Tier | Description | Ideal For |
|---|---|---|
| Basic PLA Print | Durable, slightly elastic, colourful | Learners, bulk giveaways |
| TPU Flexible Keychain | Durable, slightly elastic, colorful | Kids, premium feel |
| Custom Design + Paint | Hand-detailed or multi-color | Standard colours, matte finish |
Get a quote for bulk custom keychains
Final Thoughts
3D printing a keychain is more than just a fun experiment — it’s a gateway into the world of additive manufacturing. With just one small project, you learn about design, material, slicing, and post-processing. Start simple, learn fast, and soon you’ll be crafting everything from custom gifts to fully branded accessories.
The best way to learn 3D printing is by doing. Start with a keychain, and who knows — you might just launch your own custom product line next.