SK250 Excavator Top Roller OEM 8 Bolt Lug Pattern Excavator Undercarriage Parts

The SK250 Top 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.

The SK250 Top Roller is a vital wear part in the undercarriage of SK250-series excavators, playing a central role in maintaining track alignment, reducing friction between the track chain and rollers, and ensuring smooth operation. It works in conjunction with idlers, sprockets, and carrier rollers to support the excavator's weight and guide the track along its correct path—functions essential for stability and efficiency during heavy-duty tasks like digging, pushing, and traversing rough terrain. Proper maintenance of the top roller 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