50Mn Forged Steel HRC 40-55 Hardness Single Flange Excavator Track Roller for

The YT brand single flange track bottom roller provides a reliable replacement solution for Hitachi EX200 and EX300 series excavators. Manufactured from premium 50Mn forged steel at our ISO 9001:2008 certified facility in Fujian, China, this undercarriage component delivers consistent wear resistance and structural durability across demanding construction environments. The induction hardened tread surface achieves HRC 40-55 hardness with a 4-10 mm case depth, providing excellent resistance to abrasive wear and impact damage. Each roller features sealed lifetime-lubricated bearings that eliminate daily maintenance requirements. YT YinTai Parts leverages 35 years of manufacturing expertise to produce undercarriage components that match OEM specifications for dimensional accuracy and load capacity.

• Single flange configuration ensures stable track alignment on Hitachi EX200 and EX300 excavator undercarriage systems
• Premium 50Mn forged steel body with induction hardening delivers HRC 40-55 surface hardness for maximum wear life
• 4-10 mm case hardened depth provides deep wear protection against abrasive soils, rocks, and construction debris
• Precision-ground tread profile matches OEM specifications for smooth track chain engagement and reduced noise
• Double-tapered roller bearing assembly with lifetime grease lubrication for maintenance-free operation
• Direct OEM replacement compatible with Hitachi EX200-1 through EX200-6 and EX300-1 through EX300-5 models
• Anti-corrosion protective coating extends roller service life in wet, coastal, and chemically aggressive environments

YT YinTai Parts operates a fully integrated manufacturing facility in Quanzhou, Fujian, China, spanning over 20,000 square meters. Our track bottom rollers undergo a rigorous production workflow: raw 50Mn steel inspection and cutting, precision forging or casting using 800-ton presses, CNC machining for exact dimensional accuracy to within ±0.02mm tolerance, heat treatment through induction hardening achieving HRC 40-55 surface hardness with 4-10mm hardened depth, precision grinding, shot blasting for surface finish, rigorous quality inspection including ultrasonic flaw detection and dimensional verification, anti-corrosion coating application, and final assembly with sealed lifetime-lubricated bearings. Each roller passes a 100% load testing protocol before shipment.

YinTai Parts (YT Brand) has served the global undercarriage parts market for over 35 years. Our factory in Quanzhou, Fujian Province, houses advanced CNC machining centers, automated forging lines, and in-house heat treatment facilities. We hold ISO 9001:2008 certification and CE marking, ensuring compliance with international quality and safety standards. Our engineering team of 50+ technical professionals continuously improves product designs using finite element analysis and fatigue testing. We export to over 60 countries across Asia, Europe, Africa, the Middle East, and the Americas, with an annual production capacity exceeding 120,000 track rollers. Our OEM and aftermarket replacement parts are trusted by construction companies, mining operations, and equipment dealers worldwide.

YT single flange track bottom rollers for Hitachi EX200 and EX300 excavators are extensively used in urban construction, infrastructure development, trenching, pipe laying, foundation excavation, and demolition projects. Hitachi excavators are among the most popular construction machines in Asia, the Middle East, and Africa, making these replacement rollers a critical aftermarket component. The single flange design provides reliable track guidance for general construction applications ranging from residential building foundations to highway construction and water management projects. YT rollers are trusted by equipment rental companies, construction contractors, and Hitachi authorized service centers across emerging markets where machine uptime and parts availability directly impact project profitability.

Q1: Are YT bottom rollers compatible with all Hitachi EX200 series excavators?
A1: Yes, our YT-EX200-300-SF bottom rollers are compatible with Hitachi EX200-1, EX200-2, EX200-3, EX200-5, and EX200-6 models, as well as EX300-1 through EX300-5 variants. They are designed to meet OEM dimensional specifications for direct installation.

Q2: What makes 50Mn steel the preferred material for track rollers?
A2: 50Mn steel offers an optimal balance of hardness, toughness, and wear resistance for undercarriage components. After induction hardening to HRC 40-55, it provides excellent surface durability against abrasive wear while maintaining core toughness to resist impact cracking from rocks and hard materials.

Q3: How long do YT bottom rollers typically last compared to OEM parts?
A3: Under normal operating conditions, YT bottom rollers achieve 80-95% of OEM service life depending on application severity. Our heat treatment process and material quality ensure competitive longevity at a significantly lower cost than OEM replacement parts.

Q4: Do you offer sample orders for quality evaluation?
A4: Yes, we accept sample orders starting from 1 piece. This allows customers to evaluate material quality, dimensional accuracy, and performance before placing bulk orders. Sample orders are shipped within 3-7 business days.

Q5: What payment terms do you accept for international orders?
A5: We accept payment via L/C (Letter of Credit) and T/T (Telegraphic Transfer). For established customers, we offer flexible payment arrangements including 30% advance payment and 70% against shipping documents.

Q6: Can you manufacture custom bottom roller specifications for specific Hitachi models not listed?
A6: Yes, our engineering team can reverse-engineer and manufacture bottom rollers for any Hitachi excavator model based on sample parts or detailed dimensional drawings. Contact our technical team with your specific requirements.

All YT track bottom rollers are packaged in export-grade materials for maximum protection during transit. Standard packaging includes individual plastic wrapping, foam cushioning, and sturdy wooden pallets or plywood cases. Custom packaging options are available upon request including branded boxes and bulk packaging. Our products carry a warranty period of 12-18 months from the date of shipment, covering manufacturing defects and premature wear under normal operating conditions. Warranty claims are processed within 15 business days with photographic evidence and failure analysis. We provide full technical support and replacement parts for any warranty-covered issue.