Cross Extension Connector

🔧 Aluminum Profile Cross Extension Connector

—— Modular Expansion · Precise Adaptation · Customizable Holes

Specifically designed for 20×20 / 30×30 / 40×40 European standard aluminum profiles, this high-precision cross connector supports flexible combinations of multiple sizes, heights, and optional threaded hole positions, suitable for applications requiring high structural stability and modularity in industrial racks, automation equipment, display frames, and other scenarios

✅ Supports M2/M3 thread selection｜✅ Customizable height and number of holes｜✅ Compatible with mainstream aluminum profiles｜✅ Strong load-bearing capacity, easy installation

🎯 Core Functions

📏 Multiple Sizes Available, Precise Matching

• Adapts to 20×20 mm, 30×30 mm, 40×40 mm European standard aluminum profiles;
• Supports combinations of different insertion heights and middle section lengths to meet diverse spatial requirements.

⚙️ Configurable Threaded Hole Positions, Free Choice of Strength

• Provides M2 or M3 threaded hole options, corresponding to small and large size profiles respectively;
• Each connecting surface can have 1 or 2 holes, achieving graded reinforcement from light to heavy loads;
• The no-hole version is suitable for special scenarios requiring welding, custom drilling, or reduced interference.

➕ Cross Four-Way Connection, Building Complex Structures

• Center-symmetrical design, supporting simultaneous connection of four profiles (two by two perpendicular);
• Can be used for various combinations such as straight extensions, planar grids, and three-dimensional frames;
• It is a key connection component for building multi-layer cabinets, robot bases, and cable trays.

📐 Model Naming and Parameter Description (Please refer to the model's central plate naming)

💡 Naming Rule: [Model]-[Height]-[Number of Holes]-[Thread Specification]

💡 Tip:

• "Height30x2+5" means: 30mm for each of the upper and lower sections, 5mm for the middle transition section, total height ≈ 65mm;
• "M3x2" means each connecting arm has 2 M3 threaded holes, totaling 8 hole positions;
• The "no-holes" version has no threaded holes, suitable for direct push-fit assembly or subsequent welding.

🛠️ Structural Features

✅ High-Precision Tolerance Control

• Internal channel size and European standard profile outer contour gap ≤0.15mm, ensuring smooth insertion and removal;
• Threaded hole center position error <0.1mm, preventing tapping offset.

✅ Reinforcing Ribs and Thick Wall Design

• Internal radial reinforcing ribs significantly enhance bending and torsional resistance;
• Wall thickness ≥2.5mm (measured after PLA/PETG printing), meeting general industrial load requirements.

✅ Modular Compatible Ecosystem

• Seamlessly interoperates with right-angle connectors, T-joints, end caps, etc., from the [European Standard Aluminum Profile Series] and [Accessories Collection];
• Supports mixed use of metal and 3D printed connectors, flexibly adapting to different strength requirements.

🖨️ Printing Recommendations

⚠️ Important Tip:

• If using PLA, avoid long-term load-bearing or high-temperature environments;
• For first-time use, it is recommended to test the screw-in feel, and if necessary, a tap can be used to trim the threads.

🛠️ Installation Steps

1. Insert the connector into the end of the aluminum profile, ensuring a complete fit;
2. Insert the T-nut from the profile groove into the corresponding hole position below;
3. Use M2/M3 cup head screws to pass through the connector's threaded holes and screw into the T-nut;
4. Tighten with an Allen key to complete the rigid connection;
5. Repeat the process to extend in other directions.

✅ Tip: It is recommended to use stainless steel screws to enhance durability and aesthetics.

✅ Summary of Advantages

📌 Appendix: Naming Convention Reference Table (for quick user identification)

Hole Position Diagram

• 4040

• 3030

  

• 2020

  

🔗 Complete Ecosystem Support

This product is a core connection component of the [Aluminum Profile Accessories Collection] and is recommended for use with the following parts:

• 📌 Three-Dimensional Right-Angle Connectors (M2/M3) —— for building right-angle frames
• 📌 T-Brackets & Straight Connectors —— for branching and extension
• 📌 End Caps & Sealing Strips —— for aesthetic finishing of profile ends

👉Click to view: Compatible Aluminum Profile Accessories Library Collection (continuously updated)