Check out Intermittent Motion Mechanisms 3D Model Pack 3D model on CGTrader for $10. High-quality mesh by Atypical-Engineer.
BLEND (Blender, filesize: 213 MB), OBJ (OBJ, filesize: 337 KB), FBX (Autodesk FBX, filesize: 1.76 MB), STL (Stereolithography, filesize: 511 KB)