Motor from some DVD drive. The link ( https://goo.gl/qr948s ) is very similar, but the dimensions of the motor are not indicated there. Its dimensions are also shown in the video at the very beginning... ... Build details on video.
Donate with PayPal ---> https://www.paypal.me/perinski
Instagram ---> https://www.instagram.com/v.perinski/
Twitter ---> https://twitter.com/v_perinski
Pinterest ---> https://www.pinterest.com/v_perinski/
Tingiverse ---> https://www.thingiverse.com/thing:2110500
Facebook ---> https://www.facebook.com/3DPrinting.stl/