18mm Straight Joint Jig | Panel Alignment Clamp
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A precise, support-free straight jig for aligning two standard 18mm boards edge-to-edge. Perfect for seamless extensions
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Model information
- Source
- Printables
- Category
- Tools
- License
- Creative Commons — Attribution — Noncommercial
BOM: Printed with ROSA3D Starter PLA Red
Complete your 3D-printed woodworking and cabinet assembly toolkit! Alongside our L-corner and T-joint jigs, this straight alignment jig is the perfect tool for connecting two standard 18mm boards perfectly flush in a straight line.
Whether you are extending a workbench top, joining two cabinet back panels, or aligning long planks edge-to-edge, this jig slides over the top edge of both boards simultaneously. It locks them into a perfectly straight, flat plane, ensuring a seamless joint before you apply glue, dowels, or brackets on the back.
Key Features:
Straight Alignment: Designed to hold two separate boards perfectly flush and in line with each other.
Perfect 18mm Fit: Precisely dimensioned to hug standard 18mm cabinet boards tightly (standard for IKEA, MDF, and plywood). It features a clear "18 mm" label embossed on the side.
Alignment Windows: Triangular cutouts on the top surface let you visually confirm that both boards are pushed completely into the jig and that the seam is tight.
Lightweight & Strong: The truss-like top structure uses minimal filament while providing excellent rigidity to keep heavy boards aligned.
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 boards firmly in a straight line.