Ball bearing 3 minute spindle

thingiverse

This is a ball bearing spindle, the ball bearing idea come from these designer http://www.thingiverse.com/thing:646839 thanks, I just make a mod on the center hub for easy assambly, and also with this mod you can adjust the fit of the bearing. You only will need 25 1/4" steel balls, 12 for the bearing, 12 for the fly wheel and one on the end of the center rod as a hard point for the spindle and 3 little wood screws as you can see on the picture for the bearing assambly. Assambly de bearing (12 balls needed) , press fit other 12 balls on the outside holes on the fly wheel, and press fit the last ball on the end hole on the center rod. Place the center rod inside the hole of the fly wheel and all these on the bearing assambly. For spin it use a cord arround the thin part on the center rod holding the outside part of the bearing and pulling fast, I get 3 minutes plus 20 seconds, hope you get more time Print Settings Printer Brand: RepRap Printer: aluminum prusa i3 Rafts: Yes Supports: No Resolution: .1 Infill: 100% Notes: I use 100% fill for balance propouses i dont know if it is made semi hollow