Anhui Huihuang Chain Transmission Co., Ltd. is one of the leading manufacturers and suppliers of excavator undercarriage track chain in China, featured by quality products and good service. If you're going to wholesale advanced excavator undercarriage track chain made in China, welcome to get pricelist and free sample from our factory. We also accept customized orders.
Track chain (track link assembly) is an essential undercarriage spare part for excavators, bulldozers and crawler machines. It consists of forged track links, hardened track pins and bushes. Track shoes can be mounted on links to form a complete traveling track system. We supply two types: non-sealed dry track chain and sealed & lubricated track chain. All components are made of high-strength alloy steel with professional heat treatment to achieve outstanding impact resistance and wear resistance. A full range of sizes matches most mainstream construction machinery brands.
Advanced Sealed & Lubricated Track (SALT) Technology
Advanced Sealed and Lubricated Track (SALT) technology, designed especially to extend wear life in abrasive settings like mining, quarrying, and heavy earthmoving applications, is used in our track chains.
• Polyurethane Synthetic Seals: High-performance seal rings seal out moisture, sand, and dirt while keeping internal synthetic grease permanently sealed around the pin and bushing.
• Internal Oil Reservoir Pins: Prevents premature chain elongation (stretching) by reducing pin-to-bushing internal wear and friction by up to 50%.•
•Heat and Noise Reduction: During high-speed tracking, continuous internal lubrication guaranties smooth operation and lowers operational noise and thermal expansion.
Accurate Component Organization
Premium 35MnB high-hardenability alloy steel is used to forge
1 Track Links . Deep induction hardened (HRC 52–58) to endure high-impact quarry operations and severe bending stresses.
2 Track pins are made of case-hardened steel with a high core toughness that prevents pin breaking under high shock loads.
3 Track Bushings: Designed to withstand reverse-drive abrasion and cracking, they are carburized and heat-treated to optimize surface hardness.
4 Stopper Plugs & Seals: Industrial-grade oil-resistant parts that preserve sealing integrity in the face of drastic temperature swings (-40°C to +110°C).
Forging Process & Quality Control
Advanced Heat Treatment and the Forging Process
Each track link goes through a controlled multi-stage manufacturing process to ensure optimal service life in the field:
• Precision Hot Die Forging: Automated forging lines guaranty greater density, ideal metal grain alignment, and the removal of internal structural cavities.
• Computer-Controlled Heat Treatment: Induction hardening maintains structural flexibility at the core to minimize fatigue cracking by producing deep hardened wear layers (up to 8–12 mm depth).
• Automated Hydraulic Assembly: Precision press assembly ensures perfect seal seat alignment, tight pin retention, and constant pitch tolerances.
International Certifications and Quality Assurance
1 ISO 9001:2015 Quality System: Full traceability from raw steel billets to finished track assemblies.
2 Metallographic Inspection: Regular micro-structural testing ensuring correct martensitic grain distribution.
3 Magnaflux Crack Detection: 100% magnetic particle testing on critical load-bearing links to guarantee zero-defect shipments.
4 Hardness & Tensile Testing: Strict Rockwell (HRC) depth and core toughness verification on every production batch.
Maintenance Tips
Clean mud and gravel on track chain regularly. Keep proper track tension. Do not mix new and old track links. Replace the whole chain when excessive elongation or serious bushing wear occurs. Avoid frequent sharp turning on hard ground.
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