Ball-bearing filament spool roller based on the design of the Bambulab P1 and X1

With its simple design and anthracite color scheme, the Bambu Lab P1S is a real eye-catcher. A standard spool roller doesn't really fit in here. For this reason, I designed this roller and took up the design of the P1S/X1C. The result is a simple roller that doesn't need to hide behind the printer in respect of design.

Key features

• For spools up to 75 mm wide (also suitable for all Prusament spools) and ~200 mm diameter
• Ball bearing rollers with spool guides
• Cut-outs for rubber buffers, which provide a safe standing position
• Separate frame provides a perfect finish and offers the option of a high-gloss look ( similar to the glass cover of the printer)
• Easy to print, with very low support

Bill of material

In addition to the printed parts, at least 4 size 688 ball bearings are required. The shafts for mounting the rollers can be printed (I recommend at least PETG) or made from threaded rods. Rubber buffers can be fitted to the bottom of the roller to give it a secure stand, this is of course optional.

• 4 pcs. Ball bearing 688 (8 x 16 x 5 mm)
• 2 pcs. M8 * 89 mm threaded rod (or simlar shafts)
• 4 pcs. rubber buffers 10 x 3 mm

Assembly

The rollers consist of 3 parts, which are pressed into each other, I use a vice. The tolerances are very tight, so it is important that the printer and the filament profile are well calibrated. If there are still problems, I can provide alternative models with larger tolerances.

Rubber buffers can be glued to the bottom of the base.