All models generated by AI
Free 3D Models for 3D Printing
Browse our curated collection of free 3D models for your next project. Every model below was generated using PrintMakerAI. Download the STL or STEP file and print it, or open it in the editor to customize.
- 25
- models
- 19
- with CAD-native STEP
- Free
- to download
Featured builds
Multi-part assemblies and print-in-place mechanisms
PLA
325.7k faces
- STL
- STEP
Herringbone Planetary Fidget
A five-body planetary gearset printed as one piece: a 12-tooth sun, three 12-tooth planets and a 36-tooth ring, all 30-degree herringbone at module 1.5. The herringbone V is what traps the gears axially, so it needs no lid. Twist it once after printing to break the floor bridge.
1h 24m22g
~$0.44 in PLA72.7 × 72.7 × 18.5 mm
PLA
15.6k faces
- STL
- STEP
Print-in-Place 9-Ball Bearing
Nine 7mm balls captive in 90-degree V-groove races with 0.4mm clearance, printed as eleven separate bodies in a single job. The balls print as floating spheres the slicer bridges underneath - that is the whole challenge. Free it with a firm twist.
45m13g
~$0.26 in PLA51.6 × 50.8 × 14 mm
Part 1 of 4PETG
228 faces
- STL
- STEP
- ZIP
Self-Watering Planter Shell
Twelve-sided tapered outer reservoir with a 2.4 mm wall, chamfered rim, pour spout notch, wire pass-through and a sight slot for reading the water level.
18h 10m218g
~$5.45 in PETG155.1 × 153.8 × 130 mm
Showing 25 of 25 models
Desk & Organizers5
Bins, risers and cable wrangling for the surface you actually work on.
PETG
2.0k faces
- STL
- STEP
Desk-Edge Cable Comb
Sprung PETG C-clamp that grips a 22-28mm desk edge, with five graduated keyhole slots (3.5 to 10mm) so each cable drops into the one that fits. No screws, no adhesive.
1h 10m22g
~$0.55 in PETG58 × 34 × 43.4 mm
PLA
1.2k faces
- STL
- STEP
Gridfinity 2x2 SD Card Vault
A true Gridfinity 2x2 footprint (0.8/1.8/2.15 foot profile) rebuilt as memory-card storage: six full-size SD slots and twelve microSD slots raked at 45 degrees, with a label recess and a finger scallop to lift cards out.
5h100g
~$2.00 in PLA83.5 × 83.5 × 25.8 mm
PLA
1.2k faces
- STL
- STEP
Twin-Arch Monitor Riser
80mm monitor lift on two pointed self-supporting arches, printed upright with no supports. Hex cable tunnels in both legs, a 70-degree phone slot with a cable drop, and a headphone hook. At 278mm it sits diagonally on a 256mm bed.
9h211g
~$4.22 in PLA278 × 110 × 80 mm
PLA
272 faces
- STL
- STEP
Hex Cell Desk Organizer
Four honeycomb-packed hexagonal cells at staggered heights (95/78/62/50 mm), 1.6 mm walls, chamfered top edges — pens in the tall cell, clips in the short one.
8h 10m98g
~$1.96 in PLA121.6 × 105 × 95 mm
PLA
3.1k faces
- STL
- STEP
Spiral Earbud Winder
Chamfered figure-eight winder with a central 8 mm bore and two 3.2 mm retention slots that pinch the cable ends so the wrap does not unravel in a bag.
55m11g
~$0.22 in PLA57.8 × 26 × 8 mm
Devices & Stands4
Cradles and docks that hold a phone, headset or controller where you want it.
PETG
342 faces
Phone Stand
Adjustable phone stand with 60-degree viewing angle, fits phones up to 85mm wide.
2h 15m45g
~$1.13 in PETG60 × 11 × 88 mm
PETG
9.0k faces
Headphone Stand
Desktop headphone stand with curved hook, 200mm tall.
3h 30m65g
~$1.63 in PETG100 × 100 × 255 mm
PLA
31.0k faces
Phone Dock
Charging dock with cable routing channel, 35mm deep cradle.
1h 45m30g
~$0.60 in PLA100 × 60 × 85 mm
PETG
760 faces
- STL
- STEP
Headset & Controller Cradle
Octagonal weighted base with a hollow hex post, a filleted headband arm at 225 mm, and two front prongs that catch a game controller.
24h 35m295g
~$7.38 in PETG130 × 130 × 225 mm
Home & Living7
Multi-part builds and household fixtures — including the four-piece planter kit.
Part 1 of 4PETG
228 faces
- STL
- STEP
- ZIP
Self-Watering Planter Shell
Twelve-sided tapered outer reservoir with a 2.4 mm wall, chamfered rim, pour spout notch, wire pass-through and a sight slot for reading the water level.
18h 10m218g
~$5.45 in PETG155.1 × 153.8 × 130 mm
Part 2 of 4PETG
6.3k faces
- STL
- STEP
- ZIP
Self-Watering Planter Inner Pot
Soil pot that hangs from the reservoir rim on a flange, with eight wicking holes in the floor, an integrated 8.8 mm tube channel and a slot for a soil-moisture probe.
13h 40m164g
~$4.10 in PETG161.5 × 157.8 × 85.5 mm
Part 3 of 4PLA
14.9k faces
- STL
- STEP
- ZIP
Planter Drip Ring
Hollow distribution ring that sits on the soil and plugs onto the 8.2 mm feed tube, dispersing water through twelve 1.4 mm outlets instead of one stream.
45m9g
~$0.18 in PLA98 × 82 × 6 mm
Part 4 of 4PLA
1.0k faces
- STL
- STEP
- ZIP
Planter Electronics Dock
Rim-hanging enclosure for a pump relay module, with a filleted shell, chamfered lip, hook that clamps the planter wall and a side slot for wire exit.
1h 55m23g
~$0.46 in PLA62 × 39 × 26 mm
PLA
4.0k faces
- STL
- STEP
Interlocking Coaster
Jigsaw-tabbed 95 mm coaster that keys into its neighbours on two edges with a 0.2 mm fit tolerance, with three concentric drip-catch grooves on the face.
4h 40m56g
~$1.12 in PLA101 × 101 × 5 mm
PLA
572 faces
- STL
- STEP
Coaster Holder
Upright caddy sized for a stack of the interlocking coasters, with filleted corners and a front cutaway so the top coaster can be thumbed out.
3h 5m37g
~$0.74 in PLA103 × 30 × 45 mm
PLA
1.8k faces
- STL
- STEP
Hex Cutout Wall Hook
Screw-mounted wall hook on a rounded 60x95 mm backplate with five hexagonal cutouts, two countersunk holes and a 45-degree support wedge so it prints flat on its back.
4h 5m49g
~$0.98 in PLA60 × 95 × 34 mm
Toys & Games9
Print-in-place mechanisms, fidgets and tabletop accessories.
PLA
325.7k faces
- STL
- STEP
Herringbone Planetary Fidget
A five-body planetary gearset printed as one piece: a 12-tooth sun, three 12-tooth planets and a 36-tooth ring, all 30-degree herringbone at module 1.5. The herringbone V is what traps the gears axially, so it needs no lid. Twist it once after printing to break the floor bridge.
1h 24m22g
~$0.44 in PLA72.7 × 72.7 × 18.5 mm
PLA
15.6k faces
- STL
- STEP
Print-in-Place 9-Ball Bearing
Nine 7mm balls captive in 90-degree V-groove races with 0.4mm clearance, printed as eleven separate bodies in a single job. The balls print as floating spheres the slicer bridges underneath - that is the whole challenge. Free it with a firm twist.
45m13g
~$0.26 in PLA51.6 × 50.8 × 14 mm
PLA
15.2k faces
- STL
Gear Tower Fidget
A pocket transmission printed in one piece, nine bodies, zero assembly: a 12-tooth sun rod spun from the top knob, three planets on a slotted carrier, and a thin ring gear that climbs a hidden 3-wave cam as it revolves. Slide the collar through the side windows to shift a real dog clutch - Drive (1:1), Neutral (freewheel) or Reverse (exactly one-third speed, backwards) - while a seven-segment digit ring counts every lap through the viewing wedge. Shift to Reverse and the odometer physically rolls back.
9h 30m130g
~$2.60 in PLA78 × 78 × 88 mm
PLA
11.0k faces
- STL
- STEP
Bolt-Action Detent Slider
Two-part fidget: a rail with an eight-click detent track and a slider carrying a compliant cantilever pawl and a 35-degree bolt handle. Both parts ship on one plate; the bolt snaps in through the mouth at the +X end.
1h 40m13g
~$0.26 in PLA95 × 51 × 24.8 mm
78.3k faces
PLA
668 faces
- STL
- STEP
Gravity Token Sorter
Pour tokens onto the high corner and they sort themselves. The deck is tilted 8 degrees down-slope and 6 degrees toward a slot that widens from 14 to 30mm, so each token drops into one of four rear bins by diameter, smallest first.
4h 30m72g
~$1.44 in PLA170 × 120 × 41.7 mm
29.7k faces
- STL
- 3MF
Nested Floating Ball
A palm-sized nested sphere design where an inner ball "floats" within an outer shell. Showcase of precision print-in-place capabilities and engineered clearance calibration.
2h 30m69g
~$1.38 in PLA70 × 70 × 70 mm
PLA
6.3k faces
- STL
- STEP
Blank Jigsaw Puzzle (3x3)
Nine 40 mm blank jigsaw pieces laid out as a single print plate, with alternating knobs and 0.15 mm-clearance sockets so they actually snap together.
4h 45m57g
~$1.14 in PLA128 × 128 × 3 mm
PLA
540 faces
- STL
- STEP
Jigsaw Puzzle Frame
Filleted recessed tray sized to the assembled 3x3 puzzle with 0.6 mm of slack, so finished pieces sit flush and stay together on a shelf.
5h 40m68g
~$1.36 in PLA128 × 128 × 6 mm
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