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
NASA Super Heavy Logistics Transport for Moon and Mars
AEROSPACE · NASA SUPER HEAVY LOGISTICS TRANSPORT

NASA Super Heavy Logistics Transport for Moon and Mars

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Innovative Habitat Mobility Concept Using Pressurized Balloons
MACHINE DESIGN · PUMP IT UP 2

Innovative Habitat Mobility Concept Using Pressurized Balloons

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Detailed Fighter Jet F16 CAD Model with Advanced Surfacing
AVIATION · FIGHTER JET

Detailed Fighter Jet F16 CAD Model with Advanced Surfacing

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
RC Airplane Model for Fabrication and 3D Printing
AVIATION · RA DKG 1 RC AIRPLANE 1

RC Airplane Model for Fabrication and 3D Printing

.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
Launcher UAV 1 - Advanced Unmanned Aerial Vehicle Model
AVIATION · LAUNCHER UAV 1

Launcher UAV 1 - Advanced Unmanned Aerial Vehicle Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Kurt Vise Assembly CAD Model
MACHINE DESIGN · KURT VISE 4

Kurt Vise Assembly CAD 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
SC15 17kg Large Torque Programmable Serial Bus Servo by Waveshare
ROBOTICS · SC15

SC15 17kg Large Torque Programmable Serial Bus Servo by Waveshare

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
PCD Reamer Tool Ø10 - Detailed CAD Model
MACHINE DESIGN · PCD REAMER TOOL

PCD Reamer Tool Ø10 - Detailed CAD Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Complete PCD Expander Design for Precision Engineering
INDUSTRIAL DESIGN · ALARGADOR DE PCD

Complete PCD Expander Design for Precision Engineering

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Super Heavy Logistic Transport for Lunar and Martian Habitats
AUTOMOTIVE · SUPER HEAVY LOGISTIC TRANSPORT 2

Super Heavy Logistic Transport for Lunar and Martian Habitats

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
High-Quality Spring Model for Engineering Projects
MACHINE DESIGN · SPRING 486

High-Quality Spring Model for Engineering Projects

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Indonesian Rocket Model Commemorating 78th Independence Day
AEROSPACE · INDONESIAN ROCKET 78 EDITION 1

Indonesian Rocket Model Commemorating 78th Independence Day

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
OB7-PG2 Robotic Gripper for OB7 Robotic Arms
ROBOTICS · ROBOTIC GRIPPER

OB7-PG2 Robotic Gripper for OB7 Robotic Arms

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Super Heavy Logistics Transport with Oscillating Frame and 360-Degree Wheels
AUTOMOTIVE · SUPER HEAVY LOGISTICS TRANSPORT 2

Super Heavy Logistics Transport with Oscillating Frame and 360-Degree Wheels

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Delta Wing Model with Three Distinct Dihedral Angles
AEROSPACE · DELTA WING 4

Delta Wing Model with Three Distinct Dihedral Angles

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
iNRCORE MIL-STD-1553 Single Bus Communications Transformer Model
ELECTRICAL · INRCORE MIL STD 1553 TRANSFORMER

iNRCORE MIL-STD-1553 Single Bus Communications Transformer Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
iNRCORE Dual MIL-STD-1553 Bus Communications Transformer Model
ELECTRICAL · MIL-STD-1553

iNRCORE Dual MIL-STD-1553 Bus Communications Transformer Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
iNRCORE MIL-STD-1553 Single Bus Communications Transformer Model
ELECTRICAL · INRCORE MIL STD 1553 TRANSFORMER

iNRCORE MIL-STD-1553 Single Bus Communications Transformer Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Super Heavy Logistics Transport Concept for Lunar and Martian Missions
ROBOTICS · SHLT WALKING BEAN 1

Super Heavy Logistics Transport Concept for Lunar and Martian Missions

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Super Heavy Logistics Transporter with Mecanum Wheels and Scissors Lift Mechanism
AUTOMOTIVE · SUPER HEAVY LOGISTICS TRANSPORTER 1

Super Heavy Logistics Transporter with Mecanum Wheels and Scissors Lift Mechanism

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Four Way Electrical Conduit Joint Box with Dual Access Points
AVIATION · AVIONICS

Four Way Electrical Conduit Joint Box with Dual Access Points

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Carby V3 Starship Enterprise High Power Rocket CAD Model
AEROSPACE · CARBY V3

Carby V3 Starship Enterprise High Power Rocket CAD Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
prev...197198199200201...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