35MnBH Steel Excavator Track Chain Link with HRC 40-55 Hardness and 190.0 mm Link Pitch for Hyundai Daewoo Excavators

The DH220-DH300-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.

• Dual Brand Compatibility Engineering: Link geometry is engineered to match the undercarriage specifications shared across Hyundai R-series and Daewoo/Doosan DH and DX series excavators, providing a single part number solution that covers the most popular Korean-manufactured excavator platforms in the 22-30 ton class.
• Rigorous Dimensional Quality Control: CNC coordinate measuring machine verification at multiple production stages ensures all critical link dimensions including pitch, bore diameters, rail height, and bolt hole positions conform to specifications, guaranteeing trouble-free assembly and consistent track performance.
• Tempered Martensitic Microstructure: Our precisely controlled quenching and tempering process produces a fine-grained tempered martensitic microstructure throughout the hardened case, delivering the optimal combination of wear resistance and impact toughness required for excavator undercarriage applications.
• Ultrasonic Internal Integrity Verification: A percentage of links from every production batch undergo ultrasonic testing to verify internal material soundness, detecting any subsurface discontinuities that could develop into fatigue cracks during extended field service in demanding excavation conditions.
• Competitive Pricing Structure: Our direct factory-to-customer sales model combined with efficient manufacturing processes and economies of scale enables competitive wholesale pricing that provides substantial savings compared to OEM dealer parts while maintaining equivalent quality and performance.
• Flexible Mixed-Container Shipping: International buyers can consolidate DH220/DH300 track chains with other undercarriage components including rollers, idlers, sprockets, and track shoes in a single container shipment, optimizing freight costs and simplifying logistics management.

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.

These track chain links provide a unified undercarriage solution for Hyundai and Daewoo/Doosan hydraulic excavators in the 22-32 ton weight class, covering Hyundai R220LC through R320LC and Daewoo DH220 through DH320 series machines including the newer Doosan DX series platform. This dual-brand compatibility simplifies parts inventory management for equipment dealers and fleet operators who maintain mixed fleets of Korean-manufactured excavators. The forged 35MnBH steel construction with HRC 40-55 heat treatment delivers consistent service life across general construction, road building, utility installation, and material handling applications. International distributors benefit from our comprehensive product range that enables single-source procurement of complete undercarriage solutions for multiple excavator brands and models.

Q: Are these links compatible with both older Daewoo DH series and newer Doosan DX series excavators?

Yes, our DH220 DH300 track chain links are compatible with Daewoo DH220, DH280, DH300, and DH320 series as well as Doosan DX225LC, DX255LC, and DX300LC series excavators. The undercarriage design was carried forward through the Daewoo to Doosan brand transition with consistent track chain specifications for these model ranges.

Q: Do these links also fit Hyundai Robex R series excavators?

Yes, these track chain links are compatible with Hyundai Robex R220LC-7, R220LC-9, R290LC, R300LC, and R320LC series excavators. The shared undercarriage platform between Hyundai and Doosan excavators in the 22-32 ton class allows our single link design to serve both brands.

Q: What is the advantage of sourcing Korean excavator undercarriage parts from China?

Chinese manufacturing offers a compelling combination of competitive pricing, modern production technology, and consistent quality. Our factory in Quanzhou, Fujian uses the same forging and heat treatment processes as major OEM suppliers with ISO 9001:2008 and CE certification, delivering equivalent quality at more competitive price points due to lower production costs and efficient logistics networks.

Q: How do you handle warranty claims for international customers?

International warranty claims are handled through our authorized distributor network or directly with our factory export team. The claim process requires photographs of the affected components, operating hour meter reading, and a brief description of the operating conditions. Approved claims result in replacement parts shipped with the next regular order or via expedited courier for urgent requirements.

Q: Can you provide technical installation support for first-time buyers?

Yes, we provide detailed installation guides with step-by-step instructions, torque specifications, and track tension adjustment procedures. Our engineering team is available via email and WhatsApp for real-time technical support during initial installation. We can also recommend certified undercarriage service technicians in major markets through our distributor network.

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.