E120B Excavator Top Roller OEM Volvo Track Roller Undercarriage Replacement Parts

The E120B Top Roller is a critical undercarriage component designed for compact excavators, primarily serving to support the upper run of the rubber track and reduce friction between the track and machine frame. This ensures smooth, consistent movement during operation and helps distribute the machine's weight evenly to prevent track slippage or uneven wear.

As a key wear part, regular inspection and replacement of the top roller are essential to maintain undercarriage performance and extend the lifespan of the excavator.

Our production involves rigorous quality-controlled processes:

• High-grade Material Selection: Components are crafted from premium materials for maximum durability
• Outer Race/Shell: High-carbon chromium bearing steel (SUJ2) for superior hardness and wear resistance
• Inner Roller/Spindle: Alloy steel (SCM440) engineered to withstand significant radial and axial loads
• Seals & Lubrication: Nitrile rubber (NBR) seals for oil resistance with lithium-based grease for long-term lubrication
• Quality Assurance: All materials undergo thorough inspection for chemical composition and mechanical properties using spectrometers and hardness testers