Spool holder with bearings (on frame MK3S)

thingiverse

Very stable spool holder on top of the frame of a MK3. It is a remix of the "Chat Bubble" design by saabotage900. It provides almost vibration free delivery of the filament to the extruder due to the perfect concentricity of the spools on the bearings. If you then rotate the spool so that the filament passes through the spool "from below" (see photo), you also avoid unwanted unwinding of the filament on the spool. I like the ingenious click function, because this allows the distance between the holder parts to be easily and quickly adapted to different spool widths. The following advantages are available by using this remix design: Position of the bearings more to the back, therefore more Z-axis space is available even with non-standard modifications on the extruder (no danger of collision at high print projects) Design "cleaned" by recessed screws/nuts Additional screwing possibility, if the two holders left/right are used interchanged as one center holder (up to 3 holders next together are possible on a MK3 frame → 2 center holders) The widening of the inner side parts ensures very stable spool support even with the heaviest spools Next to the print parts, these additional parts are required: 4x bearings 608 - I use these 608zz, but 608rs are certainly also ok: https://www.amazon.de/gp/product/B07HGXXX37/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1 6x screws M3 x 18mm and 6x nuts M3 - I use parts from this set: https://www.amazon.de/gp/product/B08GHF5ZK2/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1 Please feel free to use my links to Amazon or use other offers. I don´t get any money for this advertise ;) When used as a center holder, it is recommended to optionally connect the parts together tightly and you still need these parts: 2x screws M3 x 6mm and 2x nuts M3 (parts included in the above described set from Amazon) To do this, use the two connection options below each of the bearing axes. Please note that when assembling as center holder in this way, you must first insert the 3 nuts in each of the holder elements before tightening them together with the additional M3x6mm screws. Otherwise the M3x18mm screws will not grip. My preferred filament is PETG, so I have also included the corresponding Gcode-file here. But surely printing in PLA is also possible. My PETG print was made with 0.2mm layer and 20% infill. No brim or support is needed. Have fun printing and assembling!