滾珠軸承Fidget旋轉器（打印到位）

Simple print-in-place fidget spinner! Print with no supports, no raft. After printing, spin the inner ring and the outer ring in opposite direction to break any connectio that may have formed on the fit layer. For the lowest friction, eure all balls are freely moving. Even one stuck ball will significantly reduce performance. For a cool look, try switching filaments mid-print! If you make one of these, please post a make! I'd love to see how your printer handles the geometry.