Ball Bearing Spinner (7 Planets), 1/2" and 10mm versions
thingiverse
*** UPDATE 8MAY2017: I first posted this with an incorrect title. The ball bearings are 1/2" bearings, NOT 1/4"*** This is a 7 planet ball bearing spinner. This design uses 1/2" ball bearings. The ball bearings are a tight fit. Use the below spinner press to squeeze them in to position. There is a channel in the center of each planet that will hold the bearing right in the middle so no need to worry about pushing the ball bearings in too far. There is a satisfying "snap" sound when each ball bearing snaps in to place. ***Use my Spinner Press to help insert the bearings. http://www.thingiverse.com/thing:2275122***
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