Free Mechanical & Engineering Models

Gears, Tesla valves, linkages, and print-in-place mechanisms

Some of the most fascinating 3D prints are the ones that move or demonstrate a principle: planetary gear sets, Tesla valves, compliant flexures, cam mechanisms, and print-in-place linkages. They are equal parts desk toy and engineering lesson.

This collection gathers free mechanical and engineering 3D models: working gearboxes, fluidic Tesla valves, flexure mechanisms, cams, and demonstration models. Every file is free to download from the original creator's listing.

Mechanical prints reward a tuned printer: run a tolerance test first so gears mesh and joints move freely. Print at 0.12 to 0.16 mm layers, and keep clearances generous on any part that needs to rotate.

40 trending picks

Mechanical Quick Grab/Release Phone Stand 3D model
Mechanical Quick Grab/Release Phone Stand
Thingiverse · Arron_mollet22
 Gear Bearing 3D model
Gear Bearing
Thingiverse · emmett
 3D printed mechanical Clock with Anchor Escapement 3D model
3D printed mechanical Clock with Anchor Escapement
Thingiverse · TheGoofy
 Vice mechanical v2.0 3D model
Vice mechanical v2.0
Thingiverse · swlesson
 Elliptical Gear with no center pivot 3D model
Elliptical Gear with no center pivot
Thingiverse · cohlwiler
 Mechanical Planetarium 3D model
Mechanical Planetarium
Thingiverse · Zippitybamba
 (Updated) Mechanical Iron man SD Card Holder 3D model
(Updated) Mechanical Iron man SD Card Holder
Thingiverse · ExtraChegg
 Mechanical Keyboard - SiCK-68 3D model
Mechanical Keyboard - SiCK-68
Thingiverse · FedorSosnin
 Working Gear Driven 4WD Toyota Transfer Case Model 3D model
Working Gear Driven 4WD Toyota Transfer Case Model
Thingiverse · ericthepoolboy
 Ender 3 Extruder Gear - Imperial edition 3D model
Ender 3 Extruder Gear - Imperial edition
Thingiverse · venegade
 Improved! iPhone Gear Case with Geneva Mechanism 3D model
Improved! iPhone Gear Case with Geneva Mechanism
Thingiverse · QuentinT
 Jellyfish Swimming - Mechanical Interactive Art 3D model
Jellyfish Swimming - Mechanical Interactive Art
Thingiverse · jajaum3d
 KeyV2: Parametric Mechanical Keycap Library 3D model
KeyV2: Parametric Mechanical Keycap Library
Thingiverse · rsheldiii
 Planetary gear 3D model
Planetary gear
Thingiverse · ngoodger
 Stormtrooper Helmet Interior Gear (Star Wars) 3D model
Stormtrooper Helmet Interior Gear (Star Wars)
Thingiverse · Straeker
 Turbinen Pfeife / Turbine whistle 3D model
Turbinen Pfeife / Turbine whistle
Printables · Mister4D
 Pinnacle Gear Sphere 3D model
Pinnacle Gear Sphere
Thingiverse · Reavenk
 Gear Trio version 3 3D model
Gear Trio version 3
Thingiverse · ThreeHamsWillKillHim
 Thorn from Destiny 3D model
Thorn from Destiny
MyMiniFactory · Kirby Downey
 DIY Mechanical Macro Keypad ― Ocreeb 3D model
DIY Mechanical Macro Keypad ― Ocreeb
Thingiverse · salimbenbouz
 Elephant LFS 3D model
Elephant LFS
MyMiniFactory · le FabShop
 Baby Yoda electro mechanical switch 3D model
Baby Yoda electro mechanical switch
Thingiverse · Brosion
 Mechanical Dice Box (print-in-place, no supports, no assembly) 3D model
Mechanical Dice Box (print-in-place, no supports, no assembly)
Thingiverse · giedzinski
 Flexure Joystick for XBOX 3D model
Flexure Joystick for XBOX
Thingiverse · akaki
 The Turbo Entabulator - a 3D-printable, fully mechanical computer 3D model
The Turbo Entabulator - a 3D-printable, fully mechanical computer
Thingiverse · chris
 Multiple Mechanism Auto-Rewind Spool Holder 3D model
Multiple Mechanism Auto-Rewind Spool Holder
Thingiverse · ea69
 Spherical flexure joint 1 and 2 (original files) 3D model
Spherical flexure joint 1 and 2 (original files)
Thingiverse · Jelle_Rommers
 Mechanical owl (Supportless, FDM-friendly) 3D model
Mechanical owl (Supportless, FDM-friendly)
Thingiverse · BriteMinis
 Fully 3D-printable bearing 3D model
Fully 3D-printable bearing
MyMiniFactory · Brian Brocken
 Landing gear for DJI mini 2 - Updated V2 3D model
Landing gear for DJI mini 2 - Updated V2
Thingiverse · UlrichC
 Jack'O'Valentine - Guity Gear - Fanart - 25cm model -#jackochallange 3D model
Jack'O'Valentine - Guity Gear - Fanart - 25cm model -#jackochallange
Thingiverse · printedobsession
 Portal radio 3D model
Portal radio
MyMiniFactory · Alex I
 CyberPunk Gear Mask 3D model
CyberPunk Gear Mask
Thingiverse · Nikobotics
 Trigun Revolver AGL .45 with mechanical parts 3D model
Trigun Revolver AGL .45 with mechanical parts
Thingiverse · ElLosteaux
 SwitchBox Fidget Toy 3D model
SwitchBox Fidget Toy
MakerWorld · cartyski
 Print-In-Place Planetary Gear 3D model
Print-In-Place Planetary Gear
Thingiverse · lglauberman
 Mechanical Paste Extruder 3D model
Mechanical Paste Extruder
Thingiverse · bryancera
 ultra realistic planets for Mechanical Planetarium 3D model
ultra realistic planets for Mechanical Planetarium
Thingiverse · MFHaas
 Flying Sea Turtle 3D model
Flying Sea Turtle
MyMiniFactory · Amao Chan
 Mechanical Tally Counter 4.0 3D model
Mechanical Tally Counter 4.0
MyMiniFactory · Fredrik Hamrebjörk

Frequently asked questions

Are these 3D models free to download?
Yes. Every model in this collection is free to download from the original creator's listing on platforms like Cults3D, MyMiniFactory, Thingiverse, Printables, and MakerWorld. Thinger links you to the source; it never re-hosts files.
How is this collection curated?
Models are matched to this topic automatically and ordered by how often Thinger users save them, so the list updates as new models trend. Check back for fresh picks.
What do I need to print these models?
Any home FDM or resin 3D printer works for most models here. Open the model page for details, then grab the file from the original listing and check the creator's suggested print settings.

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