Excavator upper rollers, also known as top rollers or carrier rollers.These rollers are typically made from high-strength alloy steel,offering excellent wear resistance and load-bearing capacity.The surface of these rollers usually undergoes special heat treatment processes, like quenching and tempering, to enhance wear and corrosion resistance. Additionally, high-quality sealing and lubrication systems effectively prevent contaminants from entering, ensuring long-term stable operation.