Silent Wheels for the Prusa IKEA Lack Enclosure Adjustable Spool Holder

myminifactory

After finishing the Prusa Lack enclosure from https://www.prusaprinters.org/cheap-simple-3d-printer-enclosure/, I printed the adjustable spool holder from https://www.thingiverse.com/thing:2867521, a brilliant invention for the lack enclosure. However, the noise of the spools scraping against the non-spinning wheels was quite irritating. (Watch the video on https://www.youtube.com/watch?v=qeYDtfeeHPA - the original wheel isn't rotating) So I replaced the axles and wheels with a ball bearing (8x22x7) paired with a printed tread and a matching two-part axle. It fits flawlessly into the holder and is incredibly quiet. The treads of the wheels are 9mm wide, featuring a small lip to center the ball bearing. Simply slide in a bearing (usually no need to glue it - depending on your dimensional accuracy), insert a square nut into the axle part, insert both axle parts into the bearing, and screw them together. Consider sanding the tread to make it smooth. Happy silent printing! I used a M3x20 screw with a M3 square nut to assemble the axle.