Factory Price D7G Lug Pattern Excavator Track Roller Bottom Roller

The D7G Track Roller 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.

Typically made from high-strength steel like 40Mn2, 50Mn, or 35MnB, ensuring durability and wear resistance in heavy-duty applications.

Surface hardness ranges from HRC50-58 with a hardened depth of 8-12mm, achieved through advanced heat treatment (quenching and tempering) for crack resistance.

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

KX040-4 Mini Track Roller assembly view