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Print-in-place: seven-knuckle hinge on a captive through-pin (58.4 mm)

Name: Print-in-place: seven-knuckle hinge on a captive through-pin (58.4 mm) dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

How do you 3D print a piano-style hinge with the pin already in? · Hardware · basis: Xem Studio design: horizontal through-pin, teardrop bores; one designed running gap of 0.40 mm

Also called: print in place piano hinge, print in place hinge with pin, multi knuckle hinge stl, captive pin hinge

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

length: 58.4 mm
width: 60.0 mm
height: 9.0 mm

Notes

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).

Print-in-place: seven-knuckle hinge on a captive through-pin size chart

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

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Xem Studio

Print-in-place mechanism design (geometry computed in the generator)

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

print-in-place-multi-knuckle-hinge-assembly	The whole print as laid on the bed (2 bodies, already assembled); STEP keeps each moving body a separate solid	STEP · STL
print-in-place-multi-knuckle-hinge-leaf-a	Leaf A: four knuckles and the Ø3.6 through-pin	STEP · STL
print-in-place-multi-knuckle-hinge-leaf-b	Leaf B: three knuckles with teardrop bores	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.

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Plain text: sheet.txt · JSON: /api/geometry?object=print-in-place-multi-knuckle-hinge