35MnBH Steel Excavator Track Chain Link with HRC 40-55 Hardness and 175.5 mm Link Pitch for Hitachi EX200 EX300

The EX200-EX300-TL Track Chain Link is a premium undercarriage component manufactured by YT (YinTai Parts), engineered for demanding excavator and bulldozer applications across construction, mining, and earthmoving projects. With over 35 years of manufacturing expertise based in Quanzhou, Fujian, China, our factory produces track chain links that meet stringent OEM specifications for major equipment brands worldwide.

Each track chain link is forged from 35MnBH high-grade alloy steel and undergoes a rigorous heat treatment process to achieve surface hardness levels of HRC 40-55 with a hardened depth of 4-10 mm. This advanced metallurgical treatment ensures exceptional wear resistance, extended service life, and reliable performance even in abrasive working conditions commonly encountered in mining, quarrying, heavy construction, and forestry operations.

• Forged 35MnBH Steel Construction: Manufactured from premium 35MnBH alloy steel with controlled carbon content for optimal balance between surface hardness and core toughness, ensuring maximum resistance to impact loads and abrasive wear in harsh excavation environments.
• Advanced Heat Treatment Technology: Precision-controlled austenitizing and oil quenching process achieves uniform surface hardness of HRC 40-55 with a hardened case depth of 4-10 mm, significantly extending service intervals compared to standard aftermarket links.
• Precision Machined Pin Contact Surfaces: CNC-machined bore diameters and bushing contact faces maintain tight tolerances for smooth pin rotation, reducing internal friction and preventing accelerated wear on adjacent undercarriage components during extended operation cycles.
• Direct OEM Replacement Compatibility: Engineered to exact OEM dimensional specifications for Hitachi EX200, EX200LC, EX300, EX300LC, and ZX200 series excavators, ensuring straightforward installation without modifications or adapter components required.
• Corrosion Resistant Surface Treatment: Shot-blasted and coated with protective anti-rust treatment on all surfaces, providing corrosion resistance during shipping, storage, and initial operation in humid or coastal working environments.
• Comprehensive Quality Inspection Protocol: Each production batch undergoes magnetic particle flaw detection, ultrasonic internal integrity scanning, and 3D coordinate measurement verification to guarantee zero-defect delivery to our global distribution partners.

At YT(YinTai Parts), our manufacturing process begins with the careful selection of 35MnBH steel raw material sourced from certified Chinese steel mills. The steel billets are heated to precise forging temperatures of 1100-1200 degrees Celsius in computer-controlled induction furnaces before being shaped under 2500-ton forging presses. Each link blank undergoes precision machining on CNC milling centers to achieve exact dimensional tolerances within ±0.1mm accuracy. The critical heat treatment stage involves austenitizing at 850-880 degrees Celsius followed by controlled oil quenching and tempering to achieve the specified HRC 40-55 surface hardness with 4-10mm hardened case depth. After heat treatment, every link passes through shot blasting for surface cleaning and stress relief. Final quality inspection includes magnetic particle testing for surface defects, ultrasonic testing for internal integrity, and coordinate measuring machine verification of all critical dimensions against OEM specifications.

YT (YinTai Parts) has been a trusted manufacturer of construction machinery undercarriage components since 1988, accumulating over 35 years of industry experience from our production base in Quanzhou, Fujian Province. Our 50,000-square-meter manufacturing facility is equipped with advanced forging lines, CNC machining centers, automated heat treatment furnaces, and comprehensive material testing laboratories. We hold ISO 9001:2008 quality management certification and CE certification for our exported products, ensuring compliance with international quality and safety standards. Our dedicated R&D team of 25 engineers continuously works on material improvements and design optimization to extend product service life. With an annual production capacity exceeding 120,000 track chain link assemblies, we serve distributors, equipment dealers, and end users in over 60 countries across Southeast Asia, the Middle East, Africa, South America, and Europe. Our in-house logistics team manages container loading, customs documentation, and international shipping coordination to ensure timely delivery worldwide.

This track chain link assembly is specifically designed for Hitachi EX200, EX200LC, EX300, EX300LC, ZX200, ZX210, and ZX240 series hydraulic excavators operating in general construction, road building, utility installation, residential development, and medium-duty excavation projects. The forged and heat-treated construction delivers reliable performance in soil, clay, gravel, and mixed-material digging conditions typically encountered at construction sites. Fleet operators and equipment rental companies benefit from the extended service life and reduced maintenance downtime, while independent repair shops appreciate the precise OEM fit that eliminates installation adjustments during undercarriage rebuilds.

Q: Are these track chain links compatible with both EX200-1 and EX200-5 series Hitachi excavators?

Yes, our EX200 EX300 track chain links are designed to be compatible across Hitachi EX200 series excavator generations, including EX200-1 through EX200-5, as well as the newer ZX200 and ZX210 series models. Please confirm your specific machine model and serial number when placing an order for verification.

Q: What is the recommended replacement interval for track chain links?

Under normal operating conditions in soil and mixed-material applications, our forged 35MnBH track chain links typically provide 2,000 to 3,500 operating hours of reliable service. Actual replacement intervals depend on working conditions, operator technique, routine maintenance practices, and underfoot terrain type. Regular inspection of pin and bushing wear is recommended at 500-hour intervals.

Q: Do you provide complete track chain assemblies or individual links only?

We supply both complete track chain assemblies (fully assembled with pins, bushings, and links) and individual replacement links. Complete assemblies are factory-assembled and lubricated for immediate installation, while individual links are available for partial undercarriage repair and selective replacement applications.

Q: Is the yellow color coating durable during shipping and initial operation?

Yes, the yellow powder coating applied to our track chain links provides good corrosion resistance during maritime shipping and initial field operation. The coating will naturally wear off on contact surfaces during the first few hours of operation, which is normal and does not affect link performance or durability.

Q: What documentation is provided with each order?

Each shipment includes a detailed packing list, certificate of origin (Form E/F for applicable trade agreements), material test certificates confirming 35MnBH steel composition, heat treatment records with hardness test results, and quality inspection reports. Additional documentation for customs clearance can be provided upon request.

All track chain link assemblies are packaged in export-grade wooden pallets or steel crates with protective anti-rust coating applied to all machined surfaces before shipment. Each pallet is clearly labeled with product model, quantity, batch number, and manufacturing date for easy identification and inventory management. We offer comprehensive warranty coverage of 18-24 months from the date of shipment against manufacturing defects and premature wear under normal operating conditions. In the unlikely event of a warranty claim, our technical support team provides prompt response within 24 hours and arranges replacement parts shipment within 7 working days. Custom packaging options including branded packaging, retail-ready box packaging, and OEM neutral packaging are available upon request to meet specific distribution channel requirements.