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.

9 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.

10 partspairs verified
HARDWARE

Metric Fasteners & Threaded Hardware Pack

A reusable ISO/metric fastener library cluster with screws, nuts, washers, inserts, standoffs and bolt assemblies.

6 partspairs verified
3D PRINTING

3D Printer Motion & Extruder Upgrade Kit

A 3D-printer upgrade cluster combining hotend parts, filament handling, stepper drive and motion hardware.

14 partspairs verified
ELECTRONICS PROTOTYPING

Arduino / ESP32 Prototyping Kit

A maker electronics cluster with Arduino, ESP32, breadboard, shield, servo, battery holder and enclosure.

13 partspairs verified
ROBOTICS

Robotic Arm + Gripper Kit

A robotic manipulator cluster with 6-DOF arm, gripper, wrist, servo mounts, actuator and linear guide components.

12 partspairs verified
CNC MACHINING

CNC Workholding & Tooling Kit

A CNC machining cluster covering table, clamping, vise, chuck, collet holder, spindle and ball-screw motion.

14 partspairs verified
HVAC / DUCTING

HVAC Ventilation Duct Assembly Kit

A ventilation product cluster with grille, damper, duct adapter, fan, filter, flange and duct clamp.

8 partspairs verified
FLUID POWER

Hydraulic / Pneumatic Pump & Valve Manifold Kit

A fluid-power cluster combining pump, valves, pressure gauge, manifold block, pipe and coupling parts.

16 partspairs verified
MOBILE ROBOTICS

RC / Line-Follower Robot Chassis Kit

A small mobile-robot cluster with chassis, wheels, hubs, motors, motor mounts, controller, battery holder and damper.

16 partspairs verified
WORKSPACE ACCESSORIES

Desk Cable + Phone Stand Workstation Kit

A desk-organization product cluster combining cable routing, phone holders, headphone stands and laptop/iMac stands.

8 partspairs verified
CAMERA / IMAGING RIGS

Camera Gimbal & Mount Rig Kit

A camera-rig cluster with gimbal, camera modules, tripod, tilt head, GoPro mount and camera bracket parts.

8 partspairs verified
AUTOMOTIVE & MOBILITY

1:10 RC Car Drivetrain & Suspension Kit

A 1:10 RC Car Drivetrain & Suspension Kit cluster covering related CAD components for Automotive & Mobility.

5 partspairs verified
ROBOTICS & MECHATRONICS

Arduino / ESP32 Prototyping Kit; CNC Workholding & Tooling Kit

A Arduino / ESP32 Prototyping Kit; CNC Workholding & Tooling Kit cluster covering related CAD components for Robotics & Mechatronics.

1 partpairs verified
MOTORS & POWER TRANSMISSION

Arduino / ESP32 Prototyping Kit; RC / Line-Follower Robot Chassis Kit

A Arduino / ESP32 Prototyping Kit; RC / Line-Follower Robot Chassis Kit cluster covering related CAD components for Motors & Power Transmission.

1 partpairs verified
HYDRAULICS & PNEUMATICS

Belt & Roller Conveyor Design Kit

A Belt & Roller Conveyor Design Kit cluster covering related CAD components for Hydraulics & Pneumatics.

9 partspairs verified
PUMPS & FLUID SYSTEMS

Centrifugal Pump & Motor Skid Kit

A Centrifugal Pump & Motor Skid Kit cluster covering related CAD components for Pumps & Fluid Systems.

8 partspairs verified
GENERAL ENGINEERING

Honda C-Series Engine Parts Pack

A Honda C-Series Engine Parts Pack cluster covering related CAD components for General Engineering.

4 partspairs verified
VALVES & FLOW CONTROL

Hydraulic / Pneumatic Pump & Valve Manifold Kit; Industrial Valve & Actuation Pack

A Hydraulic / Pneumatic Pump & Valve Manifold Kit; Industrial Valve & Actuation Pack cluster covering related CAD components for Valves & Flow Control.

1 partpairs verified
ENCLOSURES & PANELS

IP65/IP67 Electrical Enclosure & Control Panel Pack

A IP65/IP67 Electrical Enclosure & Control Panel Pack cluster covering related CAD components for Enclosures & Panels.

9 partspairs verified
GENERAL ENGINEERING

Industrial Gearmotor & Drive Kit

A Industrial Gearmotor & Drive Kit cluster covering related CAD components for General Engineering.

9 partspairs verified
VALVES & FLOW CONTROL

Industrial Valve & Actuation Pack

A Industrial Valve & Actuation Pack cluster covering related CAD components for Valves & Flow Control.

9 partspairs verified
PUMPS & FLUID SYSTEMS

Peristaltic / Dosing Pump Prototyping Kit

A Peristaltic / Dosing Pump Prototyping Kit cluster covering related CAD components for Pumps & Fluid Systems.

9 partspairs verified
ROBOTICS & MECHATRONICS

Raspberry Pi Case & Display Kit

A Raspberry Pi Case & Display Kit cluster covering related CAD components for Robotics & Mechatronics.

6 partspairs verified
ENGINES & POWERTRAIN

Superquadro Engine Internals Kit

A Superquadro Engine Internals Kit cluster covering related CAD components for Engines & Powertrain.

4 partspairs verified
PUMPS & FLUID SYSTEMS

Vacuum Pump System Pack

A Vacuum Pump System Pack cluster covering related CAD components for Pumps & Fluid Systems.

9 partspairs verified
10,000+ models2D drawings
Sort by:
Free
NEMA 17 Stepper Motor 60mm - Precision Motion Component
ROBOTICS · NEMA 17

NEMA 17 Stepper Motor 60mm - Precision Motion Component

.STEP
Free
NEMA 17 Coaxial Stepper Motor CAD Model
ROBOTICS · NEMA 17

NEMA 17 Coaxial Stepper Motor CAD Model

.STEP
Free
Nema 17 Stepper Motor for Precision Motion Control
ROBOTICS · NEMA17

Nema 17 Stepper Motor for Precision Motion Control

.STEP
Free
Detailed 3D Model of NEMA 17 Stepper Motor MS17HD2
ROBOTICS · NEMA17

Detailed 3D Model of NEMA 17 Stepper Motor MS17HD2

.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
Compact NEMA 17 Stepper Motor Housing with Integrated Planetary Gearbox
ROBOTICS · NEMA 17

Compact NEMA 17 Stepper Motor Housing with Integrated Planetary Gearbox

.STEP
Free
Single Start Linear Actuator with Nema 17 Stepper Motor
MACHINE DESIGN · SINGLE START LINEAR ACTUATOR

Single Start Linear Actuator with Nema 17 Stepper Motor

.STEP
Free
Precision Turntable Platform with NEMA 17 Motor for Vision Systems
ROBOTICS · PRECISION TURNTABLE

Precision Turntable Platform with NEMA 17 Motor for Vision Systems

.STEP
Free
Affordable Linear Guide System for Automation Training with NEMA 17 Motor
ROBOTICS · LINEAR GUIDE SYSTEM

Affordable Linear Guide System for Automation Training with NEMA 17 Motor

.STEP
Free
NEMA 17 Anti-Vibration Motor Spacer for Enhanced Motion Control
ROBOTICS · NEMA17

NEMA 17 Anti-Vibration Motor Spacer for Enhanced Motion Control

.STEP
Free
3D Photo Scanning Turntable with Nema 17 Motor Mount
3D PRINTING · 3D PHOTO SCANNING TURNTABLE

3D Photo Scanning Turntable with Nema 17 Motor Mount

.STEP
Free
3D Model of Angle Clamp - Early 3D Design Example
MACHINE DESIGN · ANGLE CLAMP

3D Model of Angle Clamp - Early 3D Design Example

.STEP
Free
Precision Drilling Jig Assembly for Efficient Production
MACHINE DESIGN · DRILLING JIG

Precision Drilling Jig Assembly for Efficient Production

.STEP
Free
NALCNC-PRINT Vertical Clamping Workbench for CNC Milling Machines
MACHINE DESIGN · NALCNC-PRINT

NALCNC-PRINT Vertical Clamping Workbench for CNC Milling Machines

.STEP
Free
Professional Welding Table with Clamping Accessories
INDUSTRIAL DESIGN · WELDING TABLE

Professional Welding Table with Clamping Accessories

.STEP
Free
Industrial Machine Vise 3D Assembly Model for Manufacturing Applications
MACHINE DESIGN · MACHINE VISE

Industrial Machine Vise 3D Assembly Model for Manufacturing Applications

.STEP
Free
Pipe Clamp for 80mm Diameter Pipes
CONSTRUCTION · PIPE CLAMP

Pipe Clamp for 80mm Diameter Pipes

.STEP
Free
High-Quality Clamp Model for Engineering and Design
MACHINE DESIGN · ENGINEERING

High-Quality Clamp Model for Engineering and Design

.STEP
Free
Comprehensive Plastic Injection Mold Development and Analysis
INDUSTRIAL DESIGN · PLASTIC INJECTION MOLD

Comprehensive Plastic Injection Mold Development and Analysis

.STEP
Free
Raspberry Pi Compute Module - Basic Quality Model
INDUSTRIAL DESIGN · RASPBERRY PI COMPUTE MODULE

Raspberry Pi Compute Module - Basic Quality Model

.STEP
Free
General-Purpose PCB Model for Prototyping Arduino and Raspberry Pi Projects
ELECTRICAL · PCB

General-Purpose PCB Model for Prototyping Arduino and Raspberry Pi Projects

.STEP
Free
THP-MAN2 Compressed Brick Machine with Manual and Automatic Operation
CONSTRUCTION · THP-MAN2

THP-MAN2 Compressed Brick Machine with Manual and Automatic Operation

.STEP
Free
Raspberry Pi Complete Component Overview
ELECTRICAL · RASPBERRY PI

Raspberry Pi Complete Component Overview

.STEP