April 1, 2026
Description
ModularBallCar is a fully modular 3D‑printed mini‑vehicle system featuring a magnetic base and a smooth rolling mechanism using four 10 mm steel balls.
The project includes three interchangeable shells (Brick, Car, and Custom Base) plus a STEP file for designing your own custom body.
This model is perfect for makers, students, and anyone who enjoys customizable 3D‑printed toys. Easy to print, fun to assemble, and ideal for remixing.
A block‑inspired shell, great for adding printed accessories or creative customizations.
A clean, simple mini‑car body designed to test the rolling system and magnetic attachment.
A neutral platform for designing your own shell.
Includes a STEP file for CAD modeling.
Rolling system with 4× 10 mm steel balls
4‑point magnetic mount (Ø6×3 mm magnets)
Interchangeable shells
STEP file included for custom designs
Modular, easy to print, and perfect for remixing
Great for educational and creative projects
The project includes a complete technical drawing set with dimensions, sections, and a bill of materials.
Examples from the document:
“6MM_STEEL_BALL – Qty 4 – Steel”
Key dimensions such as “Ø6.2”, “Ø9.2”, “74”, “50”, “29.4”
Material: PLA or PETG
Layer height: 0.2 mm
Infill: 20–30%
Supports: Not required for the base
Magnets: Ø6×3 mm
Steel balls: 10 mm
Magnetic base
3 shells: Brick, Car, Custom Base
STEP file for custom modeling
Technical drawings (PDF)
Makers who enjoy modular designs
Students in engineering or design
3D modeling enthusiasts
Remixers and customizers
modular car
magnetic car
10mm steel ball
ball bearing car
customizable car
3d printed toy
modular toy
magnet toy
rolling car
remixable car
cad step file
printable car
sphere car
magnet mount
License:
Creative Commons — Attribution — Noncommercial — Share Alike
Vinors3DLab
