18mm L-Corner Assembly Jig | Cabinet Clamp

BOM: Printed with ROSA3D Starter PLA Red

Make your DIY furniture building and cabinet assembly much easier with this precise 90-degree L-corner jig. Designed specifically for standard 18mm thick boards—the most common size used in flat-pack furniture like IKEA, as well as standard plywood and MDF sheets.

This L-shaped jig slides perfectly over the outside corners of two intersecting boards, holding them in a rigid, perfect 90-degree angle. This frees up your hands so you can easily drill pilot holes and drive screws without the boards slipping or misaligning. It is the perfect starting piece for your 3D-printed woodworking toolkit!

Key Features:

L-Corner Design: Specifically shaped to clamp outside right-angle joints flawlessly. Perfect 18mm Fit: Precisely dimensioned to hug standard 18mm cabinet boards tightly. It features a clear "18 mm" label embossed on the inside. Alignment Windows: Features triangular cutouts on the top surface so you can visually confirm that both boards are pushed completely flush into the corner. Side Screw Access: Includes two vertical slots on the outer faces, giving you access to drive screws directly into the joint while the jig holds everything in place. Lightweight & Strong: The truss-like top structure uses minimal filament while providing excellent rigidity to keep your corners square. Printing Instructions:

Orientation: Print normally, flat on its top surface (with the open channel facing upwards). Supports: NONE. The design is optimized to print cleanly without any support material. Perimeters: Use 3 or 4 perimeters (walls) to give the jig the stiffness required to hold heavy boards in place.

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