D155 Excavator Top Roller for 15-Ton Machines ISO CE Certified

The D155 Lug-Pattern Excavator Top Roller is a critical wear part designed for Komatsu D155 series excavators, integral to the "four-wheel-one-belt" undercarriage system (comprising track links, rollers, idlers, and sprockets). Its primary role is to support the upper section of the track chain, distribute the excavator’s weight evenly across the tracks, and maintain consistent track tension—functions that are essential for stable operation in demanding construction, mining, and quarrying environments.

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