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
Ump9 1 | 3D CAD Engineering Model
3D PRINTING · UMP9 1

Ump9 1 | 3D CAD Engineering Model

.STEP
Free
Test Weights 1 | 3D CAD Engineering Model
3D PRINTING · TEST WEIGHTS 1

Test Weights 1 | 3D CAD Engineering Model

.STEP
Free
Coral Bracket 2 | 3D CAD Engineering Model
3D PRINTING · CORAL BRACKET 2

Coral Bracket 2 | 3D CAD Engineering Model

.STEP
Free
Orange 6 | 3D CAD Engineering Model
3D PRINTING · ORANGE 6

Orange 6 | 3D CAD Engineering Model

.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
Box 254 | 3D CAD Engineering Model
3D PRINTING · BOX 254

Box 254 | 3D CAD Engineering Model

.STEP
Free
Spinner 33 | 3D CAD Engineering Model
3D PRINTING · SPINNER 33

Spinner 33 | 3D CAD Engineering Model

.STEP
Free
Buoyant Ball 1 | 3D CAD Engineering Model
3D PRINTING · BUOYANT BALL 1

Buoyant Ball 1 | 3D CAD Engineering Model

.STEP
Free
Bass Sign 1 | 3D CAD Engineering Model
3D PRINTING · BASS SIGN 1

Bass Sign 1 | 3D CAD Engineering Model

.STEP
Free
Twisted Connector 1 | 3D CAD Engineering Model
3D PRINTING · TWISTED CONNECTOR 1

Twisted Connector 1 | 3D CAD Engineering Model

.STEP
Free
Metabigyrate Rhombicosidodecahedron 1 | 3D CAD Engineering Model
3D PRINTING · METABIGYRATE RHOMBICOSIDODECAHEDRON

Metabigyrate Rhombicosidodecahedron 1 | 3D CAD Engineering Model

.STEP
Free
Voronoi Pattern Fan Grill 120Mm 1 | 3D CAD Engineering Model
3D PRINTING · VORONOI PATTERN

Voronoi Pattern Fan Grill 120Mm 1 | 3D CAD Engineering Model

.STEP
Free
Product Of Salt Box 1 | 3D CAD Engineering Model
3D PRINTING · SALT BOX

Product Of Salt Box 1 | 3D CAD Engineering Model

.STEP
Free
Kaffeefilterhalter 1 | 3D CAD Engineering Model
3D PRINTING · KAFFEEFILTERHALTER 1

Kaffeefilterhalter 1 | 3D CAD Engineering Model

.STEP
Free
Mouse Feeder 1 | 3D CAD Engineering Model
3D PRINTING · MOUSE FEEDER 1

Mouse Feeder 1 | 3D CAD Engineering Model

.STEP
Free
Ender 3 V3 Ke Filament Support 1 | 3D CAD Engineering Model
3D PRINTING · ENDER 3 V3

Ender 3 V3 Ke Filament Support 1 | 3D CAD Engineering Model

.STEP
Free
Polisseur A L Acetone Pour Piece En Abs 1 | 3D CAD Engineering Model
3D PRINTING · POLISSEUR A L ACETONE

Polisseur A L Acetone Pour Piece En Abs 1 | 3D CAD Engineering Model

.STEP
Free
Trigyrate Rhombicosidodecahedron 1 | 3D CAD Engineering Model
3D PRINTING · TRIGYRATE RHOMBICOSIDODECAHEDRON

Trigyrate Rhombicosidodecahedron 1 | 3D CAD Engineering Model

.STEP
Free
Reolink E1 Tripod Adapter 1 | 3D CAD Engineering Model
3D PRINTING · REOLINK E1 TRIPOD ADAPTER

Reolink E1 Tripod Adapter 1 | 3D CAD Engineering Model

.STEP
Free
Compact Phone Stand Experimental 1 | 3D CAD Engineering Model
3D PRINTING · COMPACT PHONE STAND EXPERIMENTAL 1

Compact Phone Stand Experimental 1 | 3D CAD Engineering Model

.STEP
Free
Silly Cat Pencil Top 1 | 3D CAD Engineering Model
3D PRINTING · SILLY CAT PENCIL TOP 1

Silly Cat Pencil Top 1 | 3D CAD Engineering Model

.STEP
Free
Flower Jar Cap 1 | 3D CAD Engineering Model
3D PRINTING · FLOWER JAR CAP 1

Flower Jar Cap 1 | 3D CAD Engineering Model

.STEP
Free
Sphere 27 | 3D CAD Engineering Model
3D PRINTING · SPHERE 27

Sphere 27 | 3D CAD Engineering Model

.STEP