Engineering CAD Design Library

Browse quality-checked 3D CAD models for engineering, product design, prototyping and manufacturing. Preview models online and download files in STEP, STP, IGES, STL, OBJ, PLY, DWG, DXF and more.

All3D PrintingAerospaceArchitectureAutomotiveAviationChemicalConstructionElectricalEnergy And PowerIndustrial DesignJewelleryMachine designMarineMedicalMiscellaneousRobotics
10,000+ models2D drawings
Sort by:
Free
Tpa Kk Series Single Axis Robots 3 | 3D CAD Engineering Model
ROBOTICS · TPA KK SERIES

Tpa Kk Series Single Axis Robots 3 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Stickymax Silicone Wheel 32Mm V1 1 1 | 3D CAD Engineering Model
MACHINE DESIGN · STICKYMAX SILICONE WHEEL 32MM V1 1 1

Stickymax Silicone Wheel 32Mm V1 1 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Mini Quadruped 1 | 3D CAD Engineering Model
ROBOTICS · MINI QUADRUPED 1

Mini Quadruped 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
I2C Oled 128X32 Display Module 1 | 3D CAD Engineering Model
ELECTRICAL · I2C

I2C Oled 128X32 Display Module 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview

Need a CAD file that is not in the library?

Share your requirement and Marathon OS will match you with a vetted CAD designer for production-ready CAD files, edits and manufacturing documentation.

Get it Built
500+Projects Done
24 hrResponse
15+CAD Tools
Free
Fire Fighting Robot 11 | 3D CAD Engineering Model
ROBOTICS · FIRE FIGHTING ROBOT 11

Fire Fighting Robot 11 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Alps Rsa0N11M9A0J 100Mm Fader Slider 1 | 3D CAD Engineering Model
ELECTRICAL · ALPS RSA0N11M9A0J

Alps Rsa0N11M9A0J 100Mm Fader Slider 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview

Browse CAD models by file format

STEP CAD modelsSTL CAD modelsIGES CAD modelsOBJ 3D modelsPLY modelsDWG drawingsDXF drawings

Browse CAD models by category

Automotive CAD modelsAerospace CAD modelsRobotics CAD models3D printing CAD modelsArchitecture CAD modelsIndustrial design CAD modelsMedical CAD modelsElectrical CAD models
Free
Esp32 Devkit1 1 | 3D CAD Engineering Model
ELECTRICAL · ESP32 DEVKIT1

Esp32 Devkit1 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Pzem 004T 100A D P V1 0 1 | 3D CAD Engineering Model
ELECTRICAL · PZEM 004T 100A D P V1 0 1

Pzem 004T 100A D P V1 0 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Tires Qc Inspection Line 1 | 3D CAD Engineering Model
INDUSTRIAL DESIGN · TIRES QC INSPECTION LINE

Tires Qc Inspection Line 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Robot Sumo Ver 2 1 | 3D CAD Engineering Model
ROBOTICS · ROBOT SUMO VER 2 1

Robot Sumo Ver 2 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Hobbywing X Rotor 2 6S 1 | 3D CAD Engineering Model
ROBOTICS · HOBBYWING X ROTOR 2 6S 1

Hobbywing X Rotor 2 6S 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Light Shield 1 | 3D CAD Engineering Model
3D PRINTING · LIGHT SHIELD 1

Light Shield 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Thermal Shield 2 | 3D CAD Engineering Model
ENERGY AND POWER · THERMAL SHIELD 2

Thermal Shield 2 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Uart Shield 1 | 3D CAD Engineering Model
ELECTRICAL · UART SHIELD 1

Uart Shield 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Swd Shield 1 | 3D CAD Engineering Model
ROBOTICS · SWD SHIELD 1

Swd Shield 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Four Legged Mechanical Dog Robot 1 | 3D CAD Engineering Model
ROBOTICS · FOUR LEGGED MECHANICAL DOG ROBOT 1

Four Legged Mechanical Dog Robot 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Poe Shield 2 | 3D CAD Engineering Model
ELECTRICAL · POE SHIELD 2

Poe Shield 2 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Relay Shield 2 | 3D CAD Engineering Model
ELECTRICAL · RELAY SHIELD 2

Relay Shield 2 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Can Rs232 Shield 2 | 3D CAD Engineering Model
ELECTRICAL · RS232

Can Rs232 Shield 2 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Servo Shield V2 1 | 3D CAD Engineering Model
ROBOTICS · SERVO SHIELD V2 1

Servo Shield V2 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Microstep Driver Tb6600 1 | 3D CAD Engineering Model
ROBOTICS · MICROSTEP DRIVER TB6600

Microstep Driver Tb6600 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Openmv Cam H7 R2 1 | 3D CAD Engineering Model
ROBOTICS · OPENMV CAM H7 R2 1

Openmv Cam H7 R2 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
prev...304305306307308...next
Marathon OS logoThe CAD marketplace for modern teams
HomeAbout usWhy us?Contact us
Tools3D to 2D Drawing Pipeline3D CAD Viewer3D CAD File Converter
Library
Hire CAD Designers
Production-ready in 24 hrs
👤
→
2D Library
Ask a question
Privacy Policy|Terms of Service|Refund Policy|
© Marathon 2025 All Rights Reserved