3D Printing CAD Models

Browse CAD models suited for 3D printing workflows. Preview online and download STL, STEP and mesh files for slicers and print-ready projects.

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
HARDWARE

Metric Fasteners & Threaded Hardware Pack

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

2 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.

7 partspairs verified
ELECTRONICS PROTOTYPING

Arduino / ESP32 Prototyping Kit

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

7 partspairs verified
ROBOTICS

Robotic Arm + Gripper Kit

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

7 partspairs verified
CNC MACHINING

CNC Workholding & Tooling Kit

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

6 partspairs verified
HVAC / DUCTING

HVAC Ventilation Duct Assembly Kit

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

6 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.

8 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.

9 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.

7 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.

5 partspairs verified
556 models2D drawings
Sort by:
Free
Compound 3/25 | 3D Engineering Design File
3D PRINTING · COMPOUND 3/25

Compound 3/25 | 3D Engineering Design File

.STEP
Free
Tmz-E | 3D Engineering Design File
3D PRINTING · TMZ-E

Tmz-E | 3D Engineering Design File

.STEP
Free
Core Xy 3D Printer | High-Quality CAD Model
3D PRINTING · CORE XY

Core Xy 3D Printer | High-Quality CAD Model

.STEP
Free
Nutcracker - Nussknacker | 3D Engineering Design File
3D PRINTING · NUTCRACKER

Nutcracker - Nussknacker | 3D Engineering Design File

.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
Chicken | 3D Engineering Design File
3D PRINTING · CHICKEN

Chicken | 3D Engineering Design File

.STEP
Free
Soporte De Lampara | 3D Engineering Design File
3D PRINTING · SOPORTE DE LAMPARA

Soporte De Lampara | 3D Engineering Design File

.STEP
Free
3D Faceted Star Sculpture | High-Quality CAD Model
3D PRINTING · FACETED STAR

3D Faceted Star Sculpture | High-Quality CAD Model

.STEP
Free
Stan Hp | 3D Engineering Design File
3D PRINTING · STAN HP

Stan Hp | 3D Engineering Design File

.STEP
Free
Box | 3D Engineering Design File
3D PRINTING · BOX

Box | 3D Engineering Design File

.STEP
Free
Rack | Holder | Shelf For Beer Bottles (Reupload) | 3D Engineering Design File
3D PRINTING · RACK

Rack | Holder | Shelf For Beer Bottles (Reupload) | 3D Engineering Design File

.STEP
Free
Design 8 | 3D Engineering Design File
3D PRINTING · DESIGN 8

Design 8 | 3D Engineering Design File

.STEP
Free
Longlife Airtag Aa-Battery Case | 3D Engineering Design File
3D PRINTING · LONGLIFE AIRTAG

Longlife Airtag Aa-Battery Case | 3D Engineering Design File

.STEP
Free
Amass Xn60Be-M | 3D Engineering Design File
3D PRINTING · AMASS XN60BE-M

Amass Xn60Be-M | 3D Engineering Design File

.STEP
Free
Pico-Ice Rev3 | 3D Engineering Design File
3D PRINTING · PICO-ICE REV3

Pico-Ice Rev3 | 3D Engineering Design File

.STEP
Free
Prusa Superpinda | High-Quality CAD Model
3D PRINTING · PRUSA SUPERPINDA

Prusa Superpinda | High-Quality CAD Model

.STEP
Free
Lumenati 8 Pack From Sparkfun | 3D Engineering Design File
3D PRINTING · LUMENATI 8 PACK

Lumenati 8 Pack From Sparkfun | 3D Engineering Design File

.STEP
Free
Batman Mask Holder | 3D Engineering Design File
3D PRINTING · BATMAN MASK HOLDER

Batman Mask Holder | 3D Engineering Design File

.STEP
Free
3D Printed Universal Covid-19 Contact Minimization Tool - Downloadable CAD Representation
3D PRINTING · COVID-19

3D Printed Universal Covid-19 Contact Minimization Tool - Downloadable CAD Representation

.STEP
Free
Gigablox Rugged | 3D Engineering Design File
3D PRINTING · GIGABLOX RUGGED

Gigablox Rugged | 3D Engineering Design File

.STEP
Free
B Case | 3D Engineering Design File
3D PRINTING · B CASE

B Case | 3D Engineering Design File

.STEP
Free
Thermobox | 3D Engineering Design File
3D PRINTING · THERMOBOX

Thermobox | 3D Engineering Design File

.STEP
Free
Diy Handheld Vacuums / 3D Printing - Downloadable CAD Representation
3D PRINTING · HANDHELD VACUUM

Diy Handheld Vacuums / 3D Printing - Downloadable CAD Representation

.STEP