Fully printable - (almost) no support - no glue - single color 3D printer

This is an articulated city bus toy (long version, you can also find a short version/without an articulation in my library...)

It is completely 3d printable.The tolerance for pieces that need to fit tightly is 0.1mm,for pieces that need to allow movement (like screws and axles) 0.3mm.

Assemble video-tutorial https://youtu.be/3McyKZAeLAM

The tricky part(s) is the articulation (TPU/flexible). It should fit/connect/snap to the back body part, but this depends a lot on how your 3d printer is tunned in. My printer ist not a very good or precise one and I had to put a little effort in actually fitting these two parts, but it still worked.

Printing list: Nb. STL file name rezolution support colour

• 1x articulation_body_flex.stl 0.16mm no black (TPU)
  
• 3x axle_die.stl 0.16mm no red
  
• 1x back_base.stl 0.16mm yes(plate) black
  
• 1x back_body.stl 0.16mm yes(plate) red/white
  
• 1x back_face.stl 0.12mm no orange/white/black
• 1x front_base.stl 0.16mm yes(plate) black
  
• 1x front_body.stl 0.16mm yes(plate) red/white
  
• 1x front_face.stl 0.12mm no red/white
  
• 1x front_number_cap.stl 0.12mm no red
  
• 4x rim_double.stl 0.12mm yes(plate) white
  
• 2x rim_single.stl 0.12mm yes(plate) white
  
• 5x screw_9mm.stl 0.16mm no red
  
• 4x screw_9mm.stl 0.16mm no black
  
• 0x sleeping_screw_9mm.stl 0.16mm no
• 12x screw_13mm.stl 0.16mm no orange
  
• 0x sleeping_screw_13mm.stl 0.16mm no
• 1x screw_articulation.stl 0.16mm no gray
  
• 0x sleeping_screw_articulation.stl 0.16mm no
• 4x screw_double_wheel.stl 0.12mm no red
  
• 2x screw_front_wheel.stl 0.12mm no red
  
• 1x sliding_doors.stl 0.12mm no orange
  
• 1x steering_wheel.stl 0.12mm no red
  
• 4x tire_bus_simple.stl 0.16mm no black (TPU)
• 6x tire_bus_with_outter_cut.stl 0.16mm no black (TPU)

The front face, back face and two body parts where printed with changing the materials for a multi-colour effect:

• front and back body - change the filament at the desired hight (white - red)
• front face - print with lights pointing up - change the filament at 3.7mm and 4.4mm (white - red - white)
• back face - print with lights pointing up - change the filament at 3.6mm and 4.1mm (orange - white - black)

The model was designed in FreeCAD, I can therefore offer some other file formats, or the FreeCAD project itself.

Any improvement suggestions are very welcome!

Happy printing!