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.

Browse by part & function

The axis engineers actually search on — pick a part type to filter the catalog.

See all parts

Build kits

Curated systems with verified mating parts — download the whole assembly at once.

All collections
CONSUMER ELECTRONICS

iPhone Accessory & Case Design Kit

A practical iPhone accessory cluster for designing cases, charging stands, holders and fit-checking around real phone geometry.

6 partspairs verified
DRONES / UAV

250 mm FPV Drone Build Kit

A complete FPV quad build cluster covering frame, propulsion, camera, control electronics, battery housing and mounting hardware.

7 partspairs verified
MOTION CONTROL

NEMA 17 Motion / Linear Actuator Kit

A motion-control cluster around a NEMA 17 stepper, bracket, coupler, GT2 belt, pulley, bearing and driver.

5 partspairs verified
10,000+ models2D drawings
Sort by:
Free
Industrial Mechanical Component CAD Model
MACHINE DESIGN · MECHANICAL COMPONENT

Industrial Mechanical Component CAD Model

.STEP
Free
Industrial Mechanical Component CAD Model
MACHINE DESIGN · MECHANICAL COMPONENT

Industrial Mechanical Component CAD Model

.STEP
Free
Precision Mechanical Component for Industrial Applications
MACHINE DESIGN · MECHANICAL COMPONENT

Precision Mechanical Component for Industrial Applications

.STEP
Free
Precision Mechanical Component for Industrial Applications
MACHINE DESIGN · MECHANICAL COMPONENT

Precision Mechanical Component for Industrial Applications

.STEP

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
Industrial Mechanical Component CAD Model
MACHINE DESIGN · MECHANICAL COMPONENT

Industrial Mechanical Component CAD Model

.STEP
Free
Precision Mechanical Component for Industrial Applications
MACHINE DESIGN · MECHANICAL COMPONENT

Precision Mechanical Component for Industrial Applications

.STEP
Free
Industrial Mechanical Component CAD Model
MACHINE DESIGN · MECHANICAL COMPONENT

Industrial Mechanical Component CAD Model

.STEP
Free
On/Off Switch CAD Model for Engineering Applications
ELECTRICAL · ON-OFF SWITCH

On/Off Switch CAD Model for Engineering Applications

.STEP
Free
Precision Mechanical Component for Industrial Applications
MACHINE DESIGN · MECHANICAL COMPONENT

Precision Mechanical Component for Industrial Applications

.STEP
Free
Equal Flow Peristaltic Metering Pump for Precise Liquid Transfer
CHEMICAL · PERISTALTIC PUMP

Equal Flow Peristaltic Metering Pump for Precise Liquid Transfer

.STEP
Free
Autonomous Robot Design for Industrial Applications
ROBOTICS · AUTONOMOUS ROBOT

Autonomous Robot Design for Industrial Applications

.STEP
Free
Precision Mechanical Component for Industrial Applications
MACHINE DESIGN · MECHANICAL COMPONENT

Precision Mechanical Component for Industrial Applications

.STEP
Free
Industrial Mechanical Component CAD Model
MACHINE DESIGN · MECHANICAL COMPONENT

Industrial Mechanical Component CAD Model

.STEP
Free
3D Printable Smart Camera Prototype Model
3D PRINTING · SMART CAMERA

3D Printable Smart Camera Prototype Model

.STEP
Free
Adaptive Slat Walkway System for Complex Motion Applications
ROBOTICS · ADAPTIVE SLAT WALKWAY

Adaptive Slat Walkway System for Complex Motion Applications

.STEP
Free
Precision Mechanical Component for Industrial Applications
MACHINE DESIGN · MECHANICAL COMPONENT

Precision Mechanical Component for Industrial Applications

.STEP
Free
Numato Labs 8-Channel 12V/24V SPDT Relay Module with USB Interface
ELECTRICAL · 8-CHANNEL RELAY MODULE

Numato Labs 8-Channel 12V/24V SPDT Relay Module with USB Interface

.STEP
Free
Industrial Mechanical Component CAD Model
MACHINE DESIGN · MECHANICAL COMPONENT

Industrial Mechanical Component CAD Model

.STEP
Free
3 and 6 Position Terminal Block for Electrical Connections
ELECTRICAL · TERMINAL BLOCK

3 and 6 Position Terminal Block for Electrical Connections

.STEP
Free
84x56mm Breadboard Model for Electronic Prototyping
ELECTRICAL · BREADBOARD

84x56mm Breadboard Model for Electronic Prototyping

.STEP
Free
Robot LIDAR System with Jetson Nano and Camera Integration
ROBOTICS · LIDAR

Robot LIDAR System with Jetson Nano and Camera Integration

.STEP
Free
Precision Mechanical Component for Industrial Applications
MACHINE DESIGN · MECHANICAL COMPONENT

Precision Mechanical Component for Industrial Applications

.STEP