RollerBars - Mini Filament Rollers for 625 bearings

thingiverse

Small and compact filament spool roller designs prove surprisingly stable. These rollers only require about 9 grams of filament per side, making them an economical choice. To assemble the complete set of two rollers, four 625 bearings are needed. This design accommodates all spool widths, providing a versatile solution for various applications. However, it's essential to note that this design relies on 625 bearings, which are smaller than the commonly used 608 bearings. As a result, filament spools with sides thicker than 5mm may not fit properly in these rollers. These compact roller designs can be particularly useful when you need them quickly, as a backup, or if you want to minimize filament consumption.