Doosan Excavator Undercarriage Spare Parts DX300LC Heat Treatment Track Bottom Roller 2270-9025
What is a roller?
As fundamental functional components within belt conveyor systems, rollers critically determine overall operational efficiency. They provide essential dynamic support for both the conveyor belt and its payload, serving as indispensable elements for sustained material handling operations.
Representing approximately 35% of a conveyor's total installation cost under standard parameters, roller procurement and maintenance constitute a significant portion of the system's life-cycle cost structure. Furthermore, roller assemblies generate over 70% of the system's total operational frictional resistance, directly impacting energy consumption and long-term operational cost-effectiveness.
Reliability is heavily dependent on roller quality; manufacturing precision, sealing integrity, and material durability directly influence failure rates (e.g., bearing seizure, premature wear), establishing rollers as a core control parameter in system reliability engineering.
Track Rollers Excavator Advantages / Features
Material Selection: Manufactured from 40Mn2, 40MnB, or 50Mn steel selected based on operational requirements, ensuring base mechanical properties align with high-strength working environments.
Manufacturing Processes: Prior to final heat treatment, undergo normalizing precision forging to optimize material microstructure, creating a uniform substrate for subsequent heat treatment.
Track rollers follow a "welding -> vertical CNC lathe precision machining" process, eliminating concentricity errors caused by post-welding machining and significantly enhancing geometric accuracy and operational stability.
Heat Treatment Performance: Achieve HRC52-56 surface hardness with a hardened layer depth of ≥ 7-10mm (HRC45), delivering superior impact resistance, wear resistance, and fatigue resistance on contact surfaces.
Sealing & Lubrication System: Integrated high-performance floating seals + long-lasting lubrication system enables reliable operation in extreme temperatures ranging from -45 °C to +120°C with zero maintenance required, extending component life significantly.
Quality Advantages: Track rollers utilize direct post-welding precision machining, eliminating concentricity deviations at the process source. This delivers unmatched resistance to rapid wear and significantly extends service life compared to traditional post-welding machining methods.
All products feature surface hardening and a structural reinforcement design, ensuring uniform contact stress distribution. This meets the demanding durability requirements of heavy-duty applications like mining and infrastructure.
The Cost-Smart Solution for Mining & Heavy Earthmoving
Eliminate excavator downtime and dominate rock-intensive operations while significantly reducing costs: address the financial drain of inadequate rollers, including premature failure on rock-strewn terrain, escalating repair expenses eroding profit margins, and productivity-killing breakdowns.
Introducing the SK220 Rollers --a premium solution engineered for rugged performance, featuring over 3,000 hours of verified durability in granite slurry and extreme rock conditions. With a 2X service life vs. standard rollers, these units incorporate premium alloy construction and a 2-year structural warranty to ensure long-term reliability.
Their advanced low-resistance design delivers a 22% reduction in fuel consumption, substantially cutting operational expenses, while their direct OEM compatibility with Kobelco equipment ensures seamless installation with zero adaptation requirements.
Ideal for maximizing uptime and cost efficiency in challenging environments, the SK220 Rollers combine durability, efficiency, and hassle-free integration to redefine performance in heavy-duty excavation.
Design/Structure/Main Dimensions of Installation
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