Enclosures and housings
Corner Marking Jig
- Bounding box
- 35 × 35 × 13 mm
- Engine
- 3D Printing B-rep
- Parameters
- 8
- Published
- November 7, 2026
Download
Free to download and use. See the terms.
The prompt
Design a precise, functional, 3D-printable corner marking jig for a square or rectangular metal sheet. The purpose of this tool is to quickly and accurately mark the drilling position near each of the four corners of a metal sheet using a pen. **Design specifications:** - Create a compact L-shaped corner positioning jig with two perpendicular internal reference edges forming a precise 90-degree angle. - The two internal reference edges must fit against the two outer edges of the metal sheet, allowing the jig to be positioned accurately at any corner. - Include a vertical cylindrical guide hole for inserting a pen tip to mark the metal sheet. - The exact center of the guide hole must be located 6.0 mm from the first internal reference edge and 6.0 mm from the second internal reference edge. - The intersection of these two 6 mm offsets defines the exact drilling center. - Use a 2.5 mm diameter guide hole for a fine-tip marking pen. - Make the jig approximately 35 mm × 35 mm overall, with a 5 mm thick horizontal body. - Include two perpendicular positioning lips extending downward along the reference edges, approximately 8 mm deep, to register against the metal sheet edges. - Ensure that the guide hole is completely open through the horizontal body so the pen can touch the metal surface. - Add small external corner fillets for comfortable handling, but keep the two internal positioning surfaces straight and perpendicular. - The jig must be reversible or usable on all four corners of a rectangular sheet without requiring separate models. - Design for FDM 3D printing without support material wherever possible. - Use millimeters for all dimensions. - Create a single solid printable part. - Export the final model as STL. **Critical requirement:** The marking hole center must be exactly 6.0 mm from both internal reference surfaces, not from the outer dimensions of the tool. This is a precision workshop marking tool, not a decorative object.
Parameters
| Name | Value | Range |
|---|---|---|
| Overall footprint | 35 mm | 25 – 60 |
| Body thickness | 5 mm | 3 – 10 |
| Lip thickness | 3 mm | 2 – 6 |
| Lip depth | 8 mm | 4 – 20 |
| Arm width | 12 mm | 10 – 20 |
| Guide hole diameter | 2.5 mm | 1.5 – 5 |
| Hole offset from reference edges | 6 mm | 4 – 10 |
| External corner fillet radius | 3 mm | 0 – 4 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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