June 12, 2026
Description
BOM: Printed with ROSA3D High Speed PLA Signal Violet
This model is a 3D-printable external L-shape corner connector designed for 40×40 T-slot aluminum extrusion profiles.
It allows you to join two profiles at a 90° angle from the outside, maintaining full internal clearance and preserving profile space for cables or other components.
Features:
🔩 Friction-fit mounting — holds securely in the grooves without screws
🧱 Clean geometry with rounded edges for perfect alignment with 4040 profiles
🖨 Prints flat, no supports required
⚙ Works with most 4040 systems (Bosch, Item, OpenBuilds, Motedis, etc.)
🔧 Ideal for modular frames, CNC enclosures, 3D printers, or robotics structures
Depending on the exact T-slot type, you may adjust tolerances by ±0.1–0.2 mm for the best friction-fit.
License:
Creative Commons — Public Domain
10
Mateusz Tokarz
