This is a model of an engineering xmas decoration of a gear tree.It is made out of 3 helical gears with a helix angle of 20 degrees. The bottom gear is trimmed in half in order to make a flat base so that it can be also used as a desk accessorie.The ring on the upper side is added so that it can be used as a christmas tree decoration.You can scale it and print it according to your needs.Please feel free to contact me if you need an further support on 3D models or if you need any customization on this model.Along with the native Solidworks file, you can also find parasolid, iges and step formats as well as stl, amf and 3mf. Polygon file is also attached.