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
Gear Motor Dual Shaft Reducer 1 | 3D CAD Engineering Model
MACHINE DESIGN · GEAR MOTOR

Gear Motor Dual Shaft Reducer 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Lgb 63120 Stromabnehmerkohlen Mit Hulsen 1 | 3D CAD Engineering Model
INDUSTRIAL DESIGN · LGB 63120

Lgb 63120 Stromabnehmerkohlen Mit Hulsen 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Cycloidal Gear 7 | 3D CAD Engineering Model
MACHINE DESIGN · CYCLOIDAL GEAR 7

Cycloidal Gear 7 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Filter Backflush Shark Matrix Plus Vacuum 1 | 3D CAD Engineering Model
INDUSTRIAL DESIGN · FILTER BACKFLUSH

Filter Backflush Shark Matrix Plus Vacuum 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
Ball Splines Hollow Type 1 | 3D CAD Engineering Model
MACHINE DESIGN · BALL SPLINES

Ball Splines Hollow Type 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Tbo Tcr 2024 Phase 2 Supercar 1 | 3D CAD Engineering Model
AUTOMOTIVE · TBO TCR 2024 PHASE 2

Tbo Tcr 2024 Phase 2 Supercar 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
Engrenagem Helicoidal 10 | 3D CAD Engineering Model
MACHINE DESIGN · ENGRENAGEM HELICOIDAL 10

Engrenagem Helicoidal 10 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
18650 Battery Holder 5 | 3D CAD Engineering Model
ELECTRICAL · 18650 BATTERY HOLDER

18650 Battery Holder 5 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Base Engranaje 1 | 3D CAD Engineering Model
MACHINE DESIGN · BASE ENGRANAJE 1

Base Engranaje 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Nema 17 Step Motor Mount 2 | 3D CAD Engineering Model
ROBOTICS · NEMA17

Nema 17 Step Motor Mount 2 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Orangepi R1 Lts 1 | 3D CAD Engineering Model
ELECTRICAL · ORANGEPI R1 LTS 1

Orangepi R1 Lts 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Showboxexpansionmodule V1 1 | 3D CAD Engineering Model
MACHINE DESIGN · SHOWBOXEXPANSIONMODULE V1 1

Showboxexpansionmodule V1 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Gabarito De Pauta 4 E 5Mm 1 | 3D CAD Engineering Model
MACHINE DESIGN · GABARITO DE PAUTA 4 E 5MM 1

Gabarito De Pauta 4 E 5Mm 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
3D Tesla Valve 1 | 3D CAD Engineering Model
INDUSTRIAL DESIGN · TESLA VALVE

3D Tesla Valve 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Sphere 27 | 3D CAD Engineering Model
3D PRINTING · SPHERE 27

Sphere 27 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Plc 1 | 3D CAD Engineering Model
INDUSTRIAL DESIGN · PLC 1

Plc 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Caja Sensor Magnetico Arduino 1 | 3D CAD Engineering Model
CAJA SENSOR MAGNETICO ARDUINO 1

Caja Sensor Magnetico Arduino 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Sfu 1204 Ball Screw Parametric 1 | 3D CAD Engineering Model
MACHINE DESIGN · SFU 1204

Sfu 1204 Ball Screw Parametric 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Laser Tree P Da 01 1 | 3D CAD Engineering Model
3D PRINTING · LASER TREE P DA 01 1

Laser Tree P Da 01 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Diminished Rhombicosidodecahedron 1 | 3D CAD Engineering Model
3D PRINTING · DIMINISHED RHOMBICOSIDODECAHEDRON

Diminished Rhombicosidodecahedron 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
Pen Cup 1 | 3D CAD Engineering Model
3D PRINTING · PEN CUP 1

Pen Cup 1 | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
Free
V Belt Wheel For 10Mm Z Belt 30Mm Bore Hole | 3D CAD Engineering Model
MACHINE DESIGN · V BELT WHEEL

V Belt Wheel For 10Mm Z Belt 30Mm Bore Hole | 3D CAD Engineering Model

.STEP
Open STEP file viewerConvert STEP to STL
<100 downloads
Preview
prev...261262263264265...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