Universal Joint with bearings

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This is a universal joint that utilizes four 1/8 x 3/8-inch R2ZZ type miniature bearings mounted in the central ball. It rotates more smoothly than a basic plastic pivot would allow. The part was printed in PLA on an Ultimaker 2. Take a look at it in motion below - note that my output shaft was slightly smaller than 6mm, resulting in the joint not being perfectly centered.