Library › Joinery › Edge & case joints ·

Dado joint (housing joint)

How deep should a dado be? · Hardware · basis: Xem Studio design — geometry computed in the generator from traditional proportions

Also called: dado joint, housing joint, trench joint, dado depth, dado dimensions, ranura, junta de ranura, Nutverbindung, Gratnut

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

length
90.0 mm
width
80.0 mm
height
100.0 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 square groove across a panel that the shelf sits in.

Dado joint size chart

dimensionvalue
stock15 mm side panel, 10 mm shelf, 80 mm deep
partsside panel, shelf
dado10 mm wide (the shelf), 5 mm deep (one third of the panel)
assemblesthe shelf slides or drops in
holdsshelf loads; needs glue, a screw or a sliding dovetail against pulling out

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Xem StudioJoinery design (geometry computed in the generator from traditional proportions)webXem Studio design

Free files

★ Free files 3 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json

dado-joint-side-panelSide panel with a 5 mm deep dadoSTEP · STL
dado-joint-shelfShelf, seated 5 mm in the dadoSTEP · STL
dado-joint-assembledAll parts in their assembled position (each part its own solid)STEP · STL
Let your AI pull this. Add 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.
Set it up →

Plain text: sheet.txt · JSON: /api/geometry?object=dado-joint

Dado joint (housing joint), isometric render of a generated part
Render of dado-joint-assembled from the free STEP; not to scale.

Fits with

Questions

How deep should a dado be?

About one third of the panel: 5 mm in a 15 mm panel.