Living hinge (flexure hinge) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/living-hinge/  (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 60.0, width 40.0, height 3.0
- 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 thin flexible web between two thick parts: lids, cases, clips and boxes in one print. Polypropylene (PP) survives thousands of bends; PETG a few dozen; PLA cracks quickly.
- Print it flat with the web on the bed and the layers running across the hinge line, so each layer bends rather than splits.

dimension  value
stock  3 mm plates, 40 mm wide
parts  hinged plate
web  0.5 mm thick, 6 mm long, at the bottom face
bends  about 180° in PP or TPU, a few times in PETG
assembles  prints flat, one piece
holds  two halves of a box, lid, clip or case together, hinged

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, 2 parts): https://xemstudio.com/files/hardware/living-hinge/index.json
API: https://xemstudio.com/api/geometry?object=living-hinge