Creality K1 Bearing Spool Holder

Description

I experienced under-extrusion problems on my K1. One of the issues causing the filament thread to be hard to feed is that the spool holder is fixed and does not rotate. I therefore created a spool holder that can use the same bayonet mount as the original, but rests on two bearings, so that it spins freely. In addition I rerouted the Bowden filament tube, so that it is not captured within the link chain. These two fixes solved my under-extrusion problems. The FreeCAD design file is included. Change it to your liking. BOM: 1 M8 Bolt at least 78 mm 1 M8 Locknut 4 M8 washers, ca 16mm x 1.5mm 2 Bearings. Any 608, 608zz or 608rs should work If you are in a pinch, you can skip the outmost and inmost washer. I had to do so, since I used a too short bolt.