Xem Studiomeasured geometryLibrary › Joinery › Mortise & tenon joints ·
Tusk tenon joint (knock-down wedged tenon)
How does a tusk tenon work? · Hardware · basis: Xem Studio design — geometry computed in the generator from traditional proportions
Also called: tusk tenon, tusk tenon joint, knock down joint, wedged tusk tenon, keyed through tenon, espiga con cuña pasante, Keilzapfen, durchgesteckter Keilzapfen
Exact dimensions. True size, with no printing tolerance added.
- length
- 80.0 mm
- width
- 115.0 mm
- height
- 44.0 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 knock-down joint: the tenon passes through and a tapered wedge through the projecting end draws it tight against the post. The slot reaches 1 mm into the mortise so the wedge bears on the post, not on the slot.
Tusk tenon joint size chart
| dimension | value |
|---|---|
| stock | 20 × 20 mm square |
| parts | post, rail, wedge |
| tenon | 8 × 14 mm, projecting 35 mm past the post |
| wedge | 5 mm thick, 1:10 taper, 44 mm long |
| assembles | tenon through, wedge driven down; knock the wedge out to take it apart |
| holds | pull-out, tightened by the wedge against the post's face |
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
| tusk-tenon-joint-post | Through-mortised member | STEP · STL |
| tusk-tenon-joint-rail | Rail with a long through tenon and a tapered wedge slot | STEP · STL |
| tusk-tenon-joint-wedge | Tapered wedge (1:10) | STEP · STL |
| tusk-tenon-joint-assembled | All parts in their assembled position (each part its own solid) | STEP · STL |
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=tusk-tenon-joint
Fits with
Questions
Why use a tusk tenon?
It takes apart: knock the wedge out and the rail slides free — good for printed furniture and stands.