# Wedged through tenon joint

> How does a wedged through tenon lock?

- Category: Joinery › Mortise & tenon joints
- Kind: Hardware
- Basis: Xem Studio design — geometry computed in the generator from traditional proportions
- Page: https://xemstudio.com/objects/wedged-through-tenon-joint/ · JSON: https://xemstudio.com/api/geometry?object=wedged-through-tenon-joint · Plain text: https://xemstudio.com/objects/wedged-through-tenon-joint/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files Xem Studio Design License (free to use and sell from, not to redistribute as files: https://xemstudio.com/license/)
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 80.0 | 80.0 | 20.0 |

**Exact dimensions.** True size, with no printing tolerance added.

## 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).
- The mortise is flared toward the far face; once the tenon is through, wedges driven beside it fill the flare and lock it like a dovetail.

## Sizes

| dimension | value |
|---|---|
| stock | 20 × 20 mm square |
| parts | stile, rail, wedge 1, wedge 2 |
| tenon | 15 × 6.67 mm, through |
| flare | 2 mm per side at the exit face (slope 1:10) |
| wedges | two, 2 mm thick at the head, 20 mm long |
| assembles | tenon in, then the wedges driven in from the exit face |
| holds | pull-out: the wedged tenon becomes a dovetail inside the flared mortise |

## Where the files are

- Xem Studio: [Joinery design (geometry computed in the generator from traditional proportions)](https://xemstudio.com/) — web — Xem Studio design

## Free STEP/STL (5 parts, Xem Studio Design License, Xem Studio)

Index: https://xemstudio.com/files/hardware/wedged-through-tenon-joint/index.json · license: https://xemstudio.com/files/hardware/wedged-through-tenon-joint/LICENSE.md

- wedged-through-tenon-joint-stile: [STEP](https://xemstudio.com/files/hardware/wedged-through-tenon-joint/wedged-through-tenon-joint-stile.step) · [STL](https://xemstudio.com/files/hardware/wedged-through-tenon-joint/wedged-through-tenon-joint-stile.stl) — Mortise flared 2 mm per side toward the exit face
- wedged-through-tenon-joint-rail: [STEP](https://xemstudio.com/files/hardware/wedged-through-tenon-joint/wedged-through-tenon-joint-rail.step) · [STL](https://xemstudio.com/files/hardware/wedged-through-tenon-joint/wedged-through-tenon-joint-rail.stl) — Through tenon
- wedged-through-tenon-joint-wedge-1: [STEP](https://xemstudio.com/files/hardware/wedged-through-tenon-joint/wedged-through-tenon-joint-wedge-1.step) · [STL](https://xemstudio.com/files/hardware/wedged-through-tenon-joint/wedged-through-tenon-joint-wedge-1.stl) — Wedge (fills one flare)
- wedged-through-tenon-joint-wedge-2: [STEP](https://xemstudio.com/files/hardware/wedged-through-tenon-joint/wedged-through-tenon-joint-wedge-2.step) · [STL](https://xemstudio.com/files/hardware/wedged-through-tenon-joint/wedged-through-tenon-joint-wedge-2.stl) — Wedge (fills the other flare)
- wedged-through-tenon-joint-assembled: [STEP](https://xemstudio.com/files/hardware/wedged-through-tenon-joint/wedged-through-tenon-joint-assembled.step) · [STL](https://xemstudio.com/files/hardware/wedged-through-tenon-joint/wedged-through-tenon-joint-assembled.stl) — All parts in their assembled position (each part its own solid)

## Questions

**Can you 3D print a wedged tenon?**

Yes: print the wedges flat; the zero-gap drawing is the locked state, so trim the wedges to taste.

## Fits with

- [Through mortise and tenon joint](https://xemstudio.com/objects/through-mortise-and-tenon-joint/)
- [Jigoku hozo (hidden wedged tenon)](https://xemstudio.com/objects/jigoku-hozo-hidden-wedged-tenon/)
- [Tusk tenon joint (knock-down wedged tenon)](https://xemstudio.com/objects/tusk-tenon-joint/)