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Dowel joint (butt joint with two dowels)

Name: Dowel joint (butt joint with two dowels) dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

How deep should dowels go in a dowel joint? · Hardware · basis: Xem Studio design — geometry computed in the generator from traditional proportions

Also called: dowel joint, doweled butt joint, dowel joint dimensions, dowel depth, unión con espigas, Dübelverbindung, Holzdübel Verbindung

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

length: 80.0 mm
width: 80.0 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).
Two dowels in a butt joint: the simplest way to join printed parts end to face.

Dowel joint size chart

dimension	value
stock	20 × 20 mm square
parts	stile, rail, dowel 1, dowel 2
dowels	2 × Ø6 × 30 mm, 10 mm apart
depth	15 mm into each part
assembles	dowels in, then butt together
holds	racking and twisting (two dowels)

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

dowel-joint-stile	Member with two Ø6 holes, 15 mm deep	STEP · STL
dowel-joint-rail	Butting member with two Ø6 holes, 15 mm deep	STEP · STL
dowel-joint-dowel-1	Ø6 × 30 mm dowel	STEP · STL
dowel-joint-dowel-2	Ø6 × 30 mm dowel	STEP · STL
dowel-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=dowel-joint