Print-in-place: seven-knuckle hinge on a captive through-pin (58.4 mm) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/print-in-place-multi-knuckle-hinge/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Xem Studio design: horizontal through-pin, teardrop bores; one designed running gap of 0.40 mm
Catalog version: 2026-10-20

Overall (mm): length 58.4, width 60.0, height 9.0
- 3D print in place — prints already assembled, moving, in one job. Drawn at true size with no printer tolerance added; the 0.40 mm running gaps are part of the design.
- Running gap 0.40 mm per side, 0.80 mm on diameter — part of the design, drawn as is. On the 45° faces the same 0.40 mm is measured square to the face (0.57 mm along the axis).
- Bed: opened flat, both leaves on the bed, axis horizontal 4.5 mm up; every knuckle stands on its 45° foot.
- Support while printing: the Ø3.6 pin belongs to leaf A and runs straight through all seven knuckles; across each leaf-B knuckle it is a 8.8 mm bridge between two leaf-A knuckles. The leaf-B bores have a 45° peaked roof (teardrop), so no ceiling is flat.
- Captured: the pin passes through every leaf-B knuckle and leaf A's knuckles close both ends, so leaf B cannot come off the pin or slide along it.
- Freeing it: hold leaf A and swing leaf B through its range a few times; the bridge layers under the pin may need one firm first turn.
- Motion: leaf B folds 183.3° up from flat (past 180°, face to face) and 98.9° down; stops are leaf on leaf (computed).

key  value  what
gap_mm  0.4  running gap per side on every moving interface (radial, axial, under captured parts) — part of the design, not a tolerance
hinge_l_mm  58.4  length along the axis
knuckles  7 × 8 mm  4 on leaf A (both ends), 3 on leaf B
knuckle_d_mm  9.0  
pin_d_mm  3.6  through-pin, part of leaf A, runs the whole length
bore_d_mm  4.4  leaf B knuckle bore, with a 45° peaked roof
leaf_w_mm  30.0  each leaf, from the axis
leaf_t_mm  3.6  
axis_h_mm  4.5  
bridge_mm  8.8  pin span between leaf A knuckles (printed as a bridge)
fold_up_deg  183.3  leaf B from flat to the stop
fold_down_deg  98.9  the other way
mount_holes  3 × Ø3.4 per leaf  

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

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 3 parts): https://xemstudio.com/files/hardware/print-in-place-multi-knuckle-hinge/index.json
API: https://xemstudio.com/api/geometry?object=print-in-place-multi-knuckle-hinge