Robotarm2 robotic arm 3D model is available on CGTrader for $23. Original author: Banism. Specs: 4554 polys, 5546 verts.
OBJ (OBJ, filesize: 655 KB), 3DS (3D Studio, filesize: 312 KB), BLEND (Blender, filesize: 1.32 MB), DAE (Collada, filesize: 1.32 MB), FBX (Autodesk FBX, filesize: 320 KB)