Komatsu D85 Idler Assy - 8.5-Ton Excavator Front Idler

The ​​D85 Idler Assy​​ (short for "idler assembly") is a critical wear component in the undercarriage system of Komatsu D85 bulldozers. It plays a vital role in supporting the track between the sprocket and idler, guiding track movement, and maintaining proper track tension to ensure machine stability and reduce premature wear on other undercarriage parts (e.g., tracks, sprockets).

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