Black 3-Way Corner Cube Connector for 2020 Aluminum Profile - 20x20x20mm Joint Block

Specifications

• Material: Solid Milled Aluminum Alloy

• Finish: Premium Black Anodized

• Dimensions: 20mm x 20mm x 20mm

• Compatibility: 2020 Series (20mm) T-Slot and V-Slot Profiles

• Joint Type: 3-Way 90-Degree Corner

• Mounting Holes: 3 x Counter-sunk holes for M5/M6 fasteners

• Weight: 12g per cube

Key Applications & Projects

• CoreXY 3D Printers: Ideal for the upper corners of Voron or RatRig style builds where internal space is at a premium.

• Professional Lab Equipment: Create sturdy, minimalist equipment racks and test stands.

• High-End PC Cases: Build custom open-air or tempered glass PC chassis with hidden joints.

• Sim-Racing Rigs: Use as high-strength reinforcement for monitor stands or peripheral mounts.

Unlock New Capabilities (Project Evolution)

• Past Projects: If you have used standard internal L-brackets, you know they can slip or rotate if not tightened perfectly.

• Feature Upgrade: The 3-way cube acts as a solid anchor point. Because it connects to the ends of the profiles, it physically prevents the extrusions from shifting, resulting in a significantly more rigid machine frame.

• Effort Level: Intermediate. Requires tapping the center hole of your 2020 profile to M5 or M6 depending on your preferred fastener.

Virtual Technician & Wiring

• Probots™ Logic-Safe Installation: For the most secure fit, we recommend tapping the profile ends with an M5 tap set. Use a drop of blue thread locker on the mounting screws to ensure the joint never vibrates loose during high-speed printing.

• Assembly Tip: Ensure your profiles are cut perfectly square (90°) for the cube to sit flush. If the cut is angled, the joint will have a visible gap.

Included Accessories

• 1 x 3-Way Corner Cube Connector (Black Anodised)

• (Note: Mounting screws and tapping tools sold separately)

Frequently Asked Questions (FAQ)

1. Do I need to tap my aluminum profiles to use this? Yes, the center hole of the 2020 profile must be tapped (usually to M5) to accept the mounting screw.

2. Does this fit V-Slot profiles? Yes, it is fully compatible with both V-Slot and T-Slot 2020 series.

3. Is this stronger than a standard corner bracket? Yes, because it connects to the core of the profile, it provides better resistance to twisting forces.

4. What length of screw should I use? Typically, an M5 x 15mm or 20mm button head screw is used depending on the depth of your tap.

5. Is the black finish scratch-resistant? The anodized finish is highly durable, but we recommend using a plastic-tipped wrench to avoid marring during assembly.

6. Can I use this for a 2040 profile? No, this is specifically for 20x20mm profiles. For 2040, you would need a 2040-specific connector.

7. Is this made of plastic or metal? It is milled from solid aluminum; it is not a plastic or zinc-cast part.

8. Does it come with the plastic end caps? No, this is the solid aluminum block version which does not require caps for a finished look.

9. How many do I need for a cube frame? You will need 8 corner cubes for a standard 6-sided cube frame.

10. Can I use M6 screws instead of M5? Most 2020 profiles have a 5mm center hole, making M5 the standard, but some can be tapped to M6.

11. Will this block the slot for my T-nuts? No, that is the main advantage—all slots remain 100% clear for mounting other parts.

12. Is it suitable for heavy-duty CNC frames? Yes, it is one of the most rigid ways to join 2020 profiles.

13. Is it weather-proof? Yes, the anodized aluminum will not rust or corrode in normal outdoor conditions.

14. What is the hole diameter in the cube? The holes are precision-sized for M5 clearance.

15. Does it provide a grounded electrical connection? Yes, as a metal-to-metal joint, it can assist in frame grounding if the anodization is slightly pierced by the screw.

16. Can I use this with 1-inch profiles? No, this is for 20mm metric profiles only.

17. Is there a silver version available? We primarily stock the Black Anodized version for a premium look, but check our catalog for silver variants.

18. How do I ensure the cube is aligned? The cube has small "lips" or the mounting screw itself will center it against the profile face.

19. What tools do I need for assembly? An M5 tap, a tap handle, and a 3mm hex key.

20. Is this part original OpenBuilds? It follows the OpenBuilds standard design for 3-way connectors.