Printrbot Simple Metal Spool Holder w. semi printed ball bearing & thread lock

Even though there are many holders for mounting the spool on top of the Z-axis rods, I wanted to create my own variant. I had some metal balls that I wanted to do something with, so I integrated them in the spool holder. Also my first attempt at creating threads, got the clearance right on the first try!

The bottom part attaches to the printer rods and 6mm balls (you could probably print the balls as well!) fits in the groove. The spindle snaps on the pin, and the nut is used to hold the spoo