Xem Studiomeasured geometryLibrary › Joinery › Mitre joints ·
Splined mitre joint (hidden spline)
How big is the spline in a mitre joint? · Hardware · basis: Xem Studio design — geometry computed in the generator from traditional proportions
Also called: splined mitre, spline mitre joint, mitre spline, miter spline, inglete con lengüeta, Gehrung mit Feder
Exact dimensions. True size, with no printing tolerance added.
- length
- 80.0 mm
- width
- 80.0 mm
- height
- 20.0 mm
Notes
- Woodworking joint drawn for 3D printing: the parts lock together by shape, so a print can be joined without glue or screws. Drawn at true size with the parts line to line (zero gap) in their assembled position — add your printer's fit allowance to the mating faces (your AI or slicer can do this).
- A thin spline across the mitre faces lines the corner up and stops it slipping.
Splined mitre joint size chart
| dimension | value |
|---|---|
| stock | 20 × 20 mm square |
| parts | part a, part b, spline |
| mitre | 45° |
| spline | 3 mm thick, 18 mm along the mitre, 10 mm across it, hidden inside |
| assembles | spline into one slot, close the mitre |
| holds | keeps the mitre aligned and adds strength |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Xem Studio | Joinery design (geometry computed in the generator from traditional proportions) | web | Xem Studio design |
Free files
★ Free files 4 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json
| splined-mitre-joint-part-a | Mitred member A with a spline slot | STEP · STL |
| splined-mitre-joint-part-b | Mitred member B with a spline slot | STEP · STL |
| splined-mitre-joint-spline | Spline 18 × 10 × 3 mm | STEP · STL |
| splined-mitre-joint-assembled | All parts in their assembled position (each part its own solid) | STEP · STL |
Let your AI pull this. Add
Set it up →https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=splined-mitre-joint
Fits with
Questions
How thick is a mitre spline?
About 1/6 of the stock: 3 mm in 20 mm here.