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.