"Universal" Ball Bearing Spool Holder

thingiverse

This is a remix of the top mount spool holder that I made for my MP mini delta. I actually made this on the MP Maker Pro Mk1. The filament reels don't exactly turn smoothly on the stock holder of the MK1, and this part assures that the spool turns smoothly regardless of how much weight is on it. Additionally, the original spool holder didn't fit several of the wider reels that I tried, so this fixes that too. This is in theory a universal part, as it can be mounted easily to T channel aluminum bars. It has 45x45 mm T channel aluminum for the gantry and the stock filament holder screws in with T channel nuts and M4 bolts. This uses both of those hardware parts and in theory can be mounted on any T channel in a similar fashion. Lots of printers use T channel for the upper gantry, so this should be applicable to those printers, too. The ball bearing is a 1/4" high speed drill bearing from the local hardware store. Wrapping some painters tape around the bearing seats it in the bearing sleeve nicely, which is then pounded into the spool holder.