Free No account needed

Print-in-Place Ball Joint Generator (OwlCAD)

A ball-and-socket joint that prints assembled, or a stack of them as a poseable arm

Print-in-Place Ball Joint Generator (OwlCAD) is a free browser tool for adding a swiveling joint or a poseable arm to a print. The customizers and the editor are free; only OwlCAD's AI features need the Pro subscription. Exports STL and 3MF; no account needed. Last checked 16 October 2026.

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Opens owlcad.com

At a glance

Price: The customizers and the editor are free; only OwlCAD's AI features need the Pro subscription
Runs on: Browser
Exports: STL, 3MF
Multicolor: No, single color
Account: Not needed
Open source: No
Skill level: Easy: a few settings to tune
Best for: Adding a swiveling joint or a poseable arm to a print
Selling prints: Allowed OwlCAD's terms include commercial use on every plan, the free tier included: you may sell prints, sell or license the files and use them in a product, with no royalty and no attribution required.
How we checked: Opened the generator Customizer opened in a browser with no account: the default single joint rendered in 3D with all settings; pricing and terms read
Checked by: Mike Janssen
Last checked: 16 October 2026

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Sources: Ball joint customizer, OwlCAD pricing, OwlCAD terms (checked 16 October 2026)

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About this generator

The Ball Joint Generator is one of the free customizers in OwlCAD, a browser-based parametric CAD tool. It makes a ball on a stem captured inside a socket whose opening is narrower than the ball, so the joint swivels freely but cannot pull out. It prints pre-assembled, with a clearance gap all round the ball.

You set the ball and stem diameters, the stem length, the socket opening and wall, the cup taper (0 to 75 degrees) and the fit (tight, normal, loose or a custom clearance gap). Set the joint count above one (up to 12) and the same unit stacks into an articulated arm, with every ball already captured in the socket below it. It suits desk-lamp arms, phone mounts and poseable figures.

It runs in the browser with no account and costs nothing; only OwlCAD's AI features are paid. It is one of 35 free OwlCAD customizers, and you can open the result in the full editor if you want to change more. Its terms give you full commercial rights to what you make, the free plan included.