The construction drilling rig is one of the models of machines that I had the pleasure to make from scratch. The contract came unexpectedly and was successful. At that time, as I remember, I made a few models of construction drilling rigs, but this one has remained with me after the project and this is what I want to share with you now.
When creating this model, I followed other self-propelled machines, mainly excavators, but from what I have figured out, this is the basis they actually have.
STL (Stereolithography, filesize: 11.2 MB), OBJ (OBJ, filesize: 13.9 MB), DAE (Collada, filesize: 16.2 MB), FBX (Autodesk FBX, filesize: 4.14 MB)