Library › 3D printing › Print-in-place mechanisms ·

Print-in-place: captive ball joint, Ø24 ball, limited cone

Name: Print-in-place: captive ball joint, Ø24 ball, limited cone dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

How do you 3D print a ball-and-socket joint already assembled? · Hardware · basis: Xem Studio design: spherical seat with 45° mouth and lip; one designed running gap of 0.40 mm

Also called: print in place ball joint, 3d printed ball and socket, ball joint stl, print in place swivel, captive ball joint

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

length: 60.0 mm
width: 60.0 mm
height: 45.0 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: socket on its square flange, ball centre 14 mm up, stem vertical. The ball stands on a Ø6 flat: its lower cap below 45° is a 45° cone down to the bed.
Support while printing: the socket is a sphere 0.40 mm larger than the ball, kept only between 30° below the equator and 45° above it — above 45° the opening begins, below 30° a 45° cone opens to the bed — so no ceiling in the socket is flatter than 45°; the ball, its foot cone, stem and knob flare are all within 45°.
Captured: the mouth (Ø17.5) and the lower lip (Ø21.5) are both smaller than the Ø24 ball, so it can leave neither way.
Freeing it: hold the socket, rock the stem round the full cone a few times and spin it; a firm first push breaks the foot off the bed.
Motion: the stem tilts 29.6° from vertical in every direction (a 59.2° cone), stopped by the stem on the mouth edge, and spins freely; computed by tilting the model about X, Y and the diagonal.

Print-in-place: captive ball joint, Ø24 ball, limited cone 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
ball_d_mm	24.0
socket_sphere_d_mm	24.8	ball + 2 × 0.40
stem_d_mm	6.0
mouth_d_mm	17.54	socket opening at the top (45° up the sphere)
lip_d_mm	21.48	socket's lower lip (30° below the equator): holds the ball from falling out
cone_half_angle_deg	29.6	stem tilt from vertical to the mouth stop, any direction
cone_angle_deg	59.2	full cone swept by the stem
spin_deg	360 continuous	about the stem
axial_play_mm	0.57	ball lift from the drawn position
socket_od_mm	44
flange_mm	60 × 60 × 4	4 × Ø4.5 on 48 × 48
knob_d_mm	16.0	on the stem, 45° flare
height_mm	45.0	as printed

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-ball-joint-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-ball-joint-socket	Socket on a 60 × 60 flange: spherical seat Ø24.8 from 30° below to 45° above the equator, 45° cones beyond	STEP · STL
print-in-place-ball-joint-ball	Ball Ø24 with a 45° foot cone, Ø6 stem, Ø16 knob	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=print-in-place-ball-joint