9 Useful 3D Prints Under 3 Hours: Settings, Sizes and Tips

Small functional prints sell and get used. Here are nine designs I modelled in code (parametric, so sizes are exact) and what makes each one print cleanly.

Print settings that work for all of them

• PLA or PETG, 0.2 mm layers, 3 walls, 15-30% infill
• No supports needed if you print flat on the large face
• Total filament for the whole set is under 250 g

The designs

1. Cable clip set (4, 6, 8 mm channels): stick on a desk edge, 10 minute print.
2. Under desk headphone hook: 36 mm cradle, two countersunk screw holes.
3. Raspberry Pi 4/5 wall mount: 58 x 49 mm standoff pattern, keyhole slots, vent slots.
4. Wall hook pair: 20 mm wide, 34 mm reach.
5. Angled phone stand with cable slot: charge while it stands.
6. 18650 battery holder: 10 cells, 2 x 5 grid.
7. Hex bit holder: 24 standard 1/4 inch bits.
8. SD and microSD holder: 4 SD + 7 microSD slots.
9. Wall key rack: 5 hooks, 160 mm wide.

Tips from modelling them

• Add 0.4-0.6 mm clearance to any hole that holds a part. 18650 bores at 18.8 mm and hex pockets at 6.6 mm work on an untuned Ender-3.
• Keep countersinks shallow (2.4 mm) so they print without supports.
• Orient so layer lines run along the load, not across it. Hooks are strongest printed on their side.

All nine are on my Cults3D page for $0.99-$1.42: https://cults3d.com/en/users/BlackSpectre512/creations

If you want printable planners and organizers for the house, my paper store is at https://payhip.com/BlackPlanners