Dovetail halving joint (dovetail lap) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/dovetail-halving-joint/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Xem Studio design — geometry computed in the generator from traditional proportions
Catalog version: 2026-10-20

Overall (mm): length 80.0, width 70.0, height 20.0
- 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).
- A T-lap whose lap is dovetail-shaped, so the end member cannot pull out of the cross member.
- Print both parts flat, lap face up.

dimension  value
stock  20 × 20 mm square
parts  cross member, end member
tail  12 mm at the shoulder → 18.67 mm at the end, 20 mm long
slope  1:6 (9.46°)
depth  10 mm (half)
assembles  the end member drops in from above
holds  pull-out along the end member, and racking

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Xem Studio: Joinery design (geometry computed in the generator from traditional proportions) — web — Xem Studio design — https://xemstudio.com/

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 3 parts): https://xemstudio.com/files/hardware/dovetail-halving-joint/index.json
API: https://xemstudio.com/api/geometry?object=dovetail-halving-joint