BMX Style "Mid" BB Press Drift kit

prusaprinters

Drifts to fit and center MID (41.2mm OD) press-fit bottom bracket bearings19mm ID install drift22mm ID install drift*24mm ID install drift*Bottom Bracket Centering Driftopposing centering drift**posted files are for use with m8 threaded press rod as received with AliExpress simple bearing press. Handles will work with the ~13mm OD hex nuts it comes withRecommended print settingsFilament: PETG or sturdier for continued use. For one-time use anything should be fineInfill: near solid will be safest, although you may get the most reliable scaling with slightly less. With the right infill pattern, you could probably get away with 80-50%Infill Pattern: cubic seems to be the most sturdy in all directions, triangle would probably be good as wellNozzle: 0.6mmWalls: ~4, maybe 5 - aiming for infill seam not to be aligned with inner edge of outer bearing raceSupports: no  .*I haven't tested with 22 or 24mm ID bearings, but same tolerance applies. Adjust parameters in bearing drift f3d file for use with different Bearing Inner diameters: BearingIDBearing Outer Diameters: BearingODBearing press rods: PressRod_Diameterthe same file could be used for the frame drift, but the posted stl did come from a different copy of the file to facilitate concurrent testing.