Library › Joinery › Japanese joinery ·

Watari ago (cogged cross joint)

Name: Watari ago (cogged cross joint) dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

What is a watari ago joint? · Hardware · basis: Xem Studio design — geometry computed in the generator from traditional proportions

Also called: watari ago, 渡り腮, cogged joint, cogged cross joint, cogging joint, japanese beam crossing, ensamble dentado, Verkämmung

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

length: 80.0 mm
width: 80.0 mm
height: 35.0 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).
Beams crossing at different heights: a shallow notch and a cog lock them while keeping both beams nearly full strength.

Watari ago size chart

dimension	value
stock	20 × 20 mm square
parts	lower beam, upper beam
notch	5 mm deep
cog	6 mm wide
assembles	the upper beam drops onto the lower
holds	both beams against sliding, without cutting either deeply

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

watari-ago-cogged-joint-lower-beam	Lower beam: notched 5 mm, leaving a 6 mm cog	STEP · STL
watari-ago-cogged-joint-upper-beam	Upper beam: a 6 mm slot for the cog	STEP · STL
watari-ago-cogged-joint-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=watari-ago-cogged-joint