Kossel Spool Top Mount for HDD Bearing

thingiverse

This is a top mounting filament spool support for Kossel Delta printers with 2020 (20mm) extrusions and 240mm extrusion side lengths to suit Anycubic Kossel Linear and similar models. It's designed to fit a Hard Drive Bearing/Motor from an old 3.5" Seagate Barracuda 80GB drive. The support prints as three identical parts that attach to the side rails with two M4x10 screws and M4 nuts. A 3mm hole is included for mounting the bearing, but this may not fit all bearings, requiring some modifications to suit different types. There's also a connector model included to connect the arms together using M4 screws. The assembly is designed to be very low profile, with the spool almost touching the top rails. Note: This design is intended as an "exact fit," making tolerances extremely tight, so it's unlikely to fit straight off the printer and will need some filing and trimming. I measured after printing and found that it was slightly oversized, so I filed the front and rear faces of all the arms until they just fitted. I also cut off one of the parts' "teeth" so it could be slid in from above without removing the side rail (although it would be possible to remove the side rail temporarily to fit). The Sketchup model is included for ease of editing, along with a 3D model of the Seagate hard drive bearing for comparison. To mount the filament spool to the bearing, I created these two adapters: http://www.thingiverse.com/thing:2052951 and http://www.thingaverse.com/thing:2340642. Note that the photos don't show the final routing of the filament; I plan to move the extruder and add filament guides. If you have a different HDD bearing, you might need an adapter, which can be found here: https://www.thingiverse.com/thing:2598023. I've recently uploaded an untested variant for the Linear Plus (spool_arm_linear_plus_01.stl) that should suit printers with 300mm extrusion length instead of 240mm. Print Settings: Printer: Anycubic Kossel Linear Rafts: No Supports: No Resolution: 0.2mm layer height, 0.8mm shell thickness Infill: 20%