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Ari tsugi (Japanese dovetail splice)

Name: Ari tsugi (Japanese dovetail splice) dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

What is an ari tsugi joint? · Hardware · basis: Xem Studio design — geometry computed in the generator from traditional proportions

Also called: ari tsugi, 蟻継ぎ, japanese dovetail splice, dovetail splice joint, japanese joinery dovetail, empalme cola de milano japonés, japanische Schwalbenschwanzverbindung

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

length: 130.0 mm
width: 20.0 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).
The simplest Japanese splice: a dovetail on one member drops into a socket in the other.

Ari tsugi size chart

dimension	value
stock	20 × 20 mm square
parts	male, female
dovetail	8 mm neck → 13 mm head, 15 mm long, full height
assembles	the male drops in from above
holds	pulling apart lengthwise

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 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

ari-tsugi-dovetail-splice-male	Male member with a full-height dovetail tenon	STEP · STL
ari-tsugi-dovetail-splice-female	Female member with the dovetail socket	STEP · STL
ari-tsugi-dovetail-splice-assembled	All 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=ari-tsugi-dovetail-splice