Magnetic Ball Joint Rod Ends

These are designed to work with 3/8" balls, 0.230" diameter carbon fiber rods, and cylindrical magnets which are 10mm in diameter and 15m high.

3D printer parts and enhancements

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This can be printed with a layer height of 0.2mm or 0.1mm.

Use a shell thickness of 2mm, so that all of the walls will be printed with concentric circles, instead of back-and-forth infill.

For PLA, use a relatively low temperature, like 185C, so that the overhang inside of the ball bearing sockets comes out as cleanly as possible.

I use a 3/8" ball end mill to gently clean out the ball bearing sockets.

Note: I have to print out at least two of these at a time, to get the correct dimensions.  I usually print out a dozen of the ball bearing holders, followed by another of the rod ends -- ie. I usually don't mix them in one print run.

I use these with my magnetic effector:

And magnetic carriages:

Contact if you need an inexpensive source for the ball studs or magnets.

Materials and methods

- 12 ball studs (you can make your own if necessary).
- 12 10mm diameter, 15mm high N50 magnets.
- 12 0.230" diameter carbon fiber tubes.
- at least two 3/8" diameter ball bearings.
- super glue and/or epoxy.



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5f081c4e1d5441f6c7864e8abbd6526b?default=blank&size=40Scott Thomas added this to the delta collection ago
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Mini haydnlookingoverthepacificHaydn Huntley commented ago

I just uploaded my magnetic jig design. It uses an extra 2 magnets and two 1/4" (or 6mm) threaded rods with 16 nuts.

Mini img 0212Rendy Gunardi added this to the kossel collection ago
B44955a41918ff4f3b2af4c4cda0c503?default=blank&size=40Antonio Rodriguez added this to the Kossel collection ago
Mini haydnlookingoverthepacificHaydn Huntley published this design ago