1/16 Scale FrankenDiff

[Zabco]

When you create the .stl file from your 3d model in alibre a stl configurations box should pop up. Make sure and use a value no greater than 1 degree for the faceting parameters setting. stls do not contain true circles, only straight lines. A value of 1 degree would create a circle comprised of 360 straight lines. If your faceting was set to say 6 degrees then the circle would only consist of 60 lines. The lines would be longer but more importantly the center distance between two opposing lines (the diameter of your circle) would be less than the desired diameter. This would compress your bearing when you tightened up the two axle halves.