Excavator Track Roller Model D20 SCM440 Alloy Steel Nitrile Rubber

The D20 mini track roller is a critical wear part designed for ​​mini excavators​​ (e.g., 1-5 ton models) and ​​small bulldozers​​, serving as a ​​bottom roller​​ (or support roller) to bear the machine’s weight, ensure smooth track movement, and reduce friction between the tracks and undercarriage frame. Its compact design and durable construction make it ideal for navigating uneven or abrasive terrain, where reliability is key to minimizing downtime.

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