Xem Studiomeasured geometry

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Half lap splice joint

How long is a half lap splice? · Hardware · basis: Xem Studio design — geometry computed in the generator from traditional proportions

Also called: half lap splice, lap splice joint, end lap splice, empalme a media madera, gerades Blatt

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

length
160.0 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).
  • Lengthens a member: each end is halved over two stock widths and the halves overlap.

Half lap splice joint size chart

dimensionvalue
stock20 × 20 mm square
partspart a, part b
lap40 mm (two stock widths) × 10 mm
assemblesB drops onto A
holdswith two pins or screws through the lap

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

half-lap-splice-joint-part-aMember A, top half removed over 40 mmSTEP · STL
half-lap-splice-joint-part-bMember B, bottom half removed over 40 mmSTEP · STL
half-lap-splice-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=half-lap-splice-joint

Half lap splice joint, isometric render of a generated part
Render of half-lap-splice-joint-assembled from the free STEP; not to scale.

Fits with

Plain scarf joint (1:4), isometric render of a generated part
Plain scarf joint (1:4)200.0×20.0×20.0 mm★ 3 files
Half lap joint (corner), isometric render of a generated part
Half lap joint (corner)60.0×60.0×20.0 mm★ 3 files
Hooked scarf joint (okkake tsugi), isometric render of a generated part
Hooked scarf joint (okkake tsugi)220.0×20.0×20.0 mm★ 3 files

Questions

How long should a lap splice be?

At least two stock widths: 40 mm in 20 mm stock.