I was annoyed by the axial play of the internal bearings of my Nema17 on the Z axis of my modded Anet AM8. That's why i designed this bolt-on solution which is fixed with the motor screws of the Nema17.
To install it you'll need two M4x12 (M4x10 or M4x16 might also work), two M4 nuts and four motor screws (M3) which are about 5mm longer than the previously installed ones.
Use the M4 screws and nuts to fix the KFL bearing to the printed bracket and install it on your printer. Done, that's it. :)
Print with support. Use a knife to cut the holes after the print. Mount it. :)