Hitachi EX400 Excavator Front Idler Assy 40-Ton Lug-Pattern

Factory Price EX400 Lug-Pattern Excavator Idler Assy Front Idler for 40-Ton Hitachi EX400-Series

The EX400 Idler Assy is Kubota's compact powerhouse component designed for excavators in demanding Australian projects. This precision-engineered bottom roller ensures durability, excellent load-bearing capacity, and smooth operation in compact construction machinery.

The EX400 Idler Assy (short for "idler assembly") is a vital wear part in the undercarriage of EX400-series excavators, playing a central role in maintaining track alignment, reducing friction between the track chain and rollers, and supporting the machine's weight during operation. It works in conjunction with sprockets, rollers, and carrier rollers to ensure the track moves smoothly along its designated path--functions essential for stability, efficiency, and longevity in heavy-duty tasks like digging, pushing, and traversing rough terrain. Proper maintenance of the idler assembly is key to minimizing downtime and extending the lifespan of the undercarriage.

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