Check out Single chain roller conveyor 3D model on CGTrader for $20. High-quality mesh by jaketnet2012. Textured.
STP (STEP, filesize: 38.7 MB), JPG (JPG, filesize: 33.3 MB), PNG (PNG, filesize: 33.3 MB), MAX (Autodesk 3ds Max, filesize: 33.3 MB), FBX (Autodesk FBX, filesize: 14.7 MB)