=Introduction= Hinges allow portions of projects to articulate, swivel, or swing.
=Challenges= Precise alignment if hinges is required for proper function.
=Approaches= Frames provide precise alignment and hole placement. Bolts provide a pin around which to rotate. Axial bearings, and thrust bearings facilitate smooth and we'll supported rotation, washers reduce damage to frames, shaft collars and nuts secure assemblies in place.
=References= <youtube>xo1oKkvCQUg</youtube>