Xem Studiomeasured geometryLibrary › Joinery › Lap & halving joints ·
Half lap joint (corner)
What are the proportions of a half lap joint? · Hardware · basis: Xem Studio design — geometry computed in the generator from traditional proportions
Also called: half lap joint, end lap joint, corner halving joint, half lap joint dimensions, 3d printed half lap joint, junta a media madera, ensamble a media madera, Eckverblattung, Überblattung
Exact dimensions. True size, with no printing tolerance added.
- length
- 60.0 mm
- width
- 60.0 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).
- Each member is cut to half its thickness over one stock width, so the corner is flush on both faces.
- For a 3D print, print both parts flat (lap face up) and pin the corner with a Ø3–5 mm pin or a screw if it must not lift.
Half lap joint size chart
| dimension | value |
|---|---|
| stock | 20 × 20 mm square |
| parts | part a, part b |
| lap length | 20 mm (one stock width) |
| lap depth | 10 mm (half the thickness) on each part |
| assembles | B drops onto A from above |
| holds | racking in the plane of the frame; needs a pin or screw against lifting |
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
| half-lap-joint-part-a | Member A: lower half removed over the lap | STEP · STL |
| half-lap-joint-part-b | Member B: upper half removed over the lap | STEP · STL |
| half-lap-joint-assembled | All parts in their assembled position (each part its own solid) | STEP · STL |
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.Plain text: sheet.txt · JSON: /api/geometry?object=half-lap-joint
Fits with
Questions
How deep is a half lap?
Half the stock thickness on each part: 10 mm here, over a lap one stock width (20 mm) long.
Can you 3D print a half lap joint?
Yes — both parts print flat; add your fit allowance to the two lap faces.