This is a reinforced internal 90° connector for 2020 V-slot aluminum extrusion profiles.
It fits snugly inside two intersecting profiles, joining them at a perfect right angle (90°) with a secure snap-fit / friction-fit connection.
This updated version is stronger and thicker than the original minimalist connector — designed for applications requiring greater frame rigidity and load support.
Perfect for use in CNC machines, 3D printer frames, enclosures, or robotic assemblies, where compact internal corner joints are preferred over bulky external brackets.
Reinforced version of the standard internal 2020 connector
Creates a clean 90° internal joint
Snap-fit design, no screws or T-nuts needed
Compact and flush inside the frame
Improved strength and fit precision
Easy to print and install
3D printer and CNC frames
Enclosures and machine corners
Robotics and modular structures
Projects requiring smooth external surfaces
Material: PETG / ABS for maximum durability
Layer Height: 0.2 mm
Infill: 60–100 %
Supports: Not required
Orientation: Flat on bed
V-slot / OpenBuilds 2020
Also compatible with standard 20×20 T-slot profiles
The author marked this model as their own original creation.