35MnBH Forged Steel Dry Track Chain Assembly with 216mm Pitch for Komatsu Bulldozer Undercarriage

The D65 D85 heavy duty dry track chain assembly is purpose-built for Komatsu D65, D85, and TY230 bulldozers operating in severe earthmoving, mining, and heavy construction environments. Unlike sealed lubricated chains, this dry-type track chain utilizes robust grease-lubricated pin-to-bushing interfaces designed for high-temperature applications where external heat may compromise seal integrity. Manufactured from 35MnBH alloy steel with a 216mm link pitch, this assembly provides exceptional strength and reliability in conditions involving abrasive soils, rocky terrain, and sustained heavy pushing loads. With over 35 years of manufacturing expertise, YinTai delivers track chain solutions trusted by equipment fleets across more than 50 countries.

• Dry-Type Chain Design: Grease-lubricated pin-to-bushing interface eliminates seal degradation concerns in high-temperature operating conditions, making this chain ideal for foundry slag handling, desert earthmoving, and continuous heavy-load bulldozing operations where temperatures regularly exceed 80°C.
• 35MnBH Boron-Manganese Steel: Premium alloy composition delivers an optimal combination of core ductility and surface hardenability, resistant to impact-induced cracking while supporting high wear resistance across the entire link profile during extended service intervals.
• 216mm Pitch Configuration: Standardized track pitch compatible with Komatsu D65, D85, and Chinese TY230 bulldozer sprockets, ensuring smooth power transmission and even load distribution across all track links during operation.
• Deep Case Hardening: Medium-frequency induction heat treatment achieves HRC 40-55 surface hardness with 4-10mm effective case depth, providing sustained wear resistance even after the first 2,000 operating hours in abrasive conditions.
• Precision Forged Link Body: Hot forging at 1200°C creates a refined grain flow pattern following the link contour, increasing fatigue strength by 25-30% compared to cast link bodies typically found in economy-grade replacement chains.
• Interchangeable Bushing System: Press-fit bushings allow field replacement without requiring full chain disassembly, enabling fleet maintenance teams to extend chain service life through scheduled bushing rotation programs.

YinTai utilizes a fully integrated manufacturing workflow to maintain consistent quality across every production batch. Raw 35MnBH steel billets undergo spectrometer analysis upon receipt to verify chemical composition compliance with GB/T 3077 specifications. Link bodies are hot-forged on 2500-ton presses at 1150-1200°C, then normalized at 880°C to relieve forging stresses and refine grain structure. Following normalization, each link undergoes precision machining on 5-axis CNC centers for pin bore boring, bolt hole drilling, and contact face milling, with dimensional tolerances maintained within ±0.05mm. Pins and bushings are separately induction-hardened to HRC 58-62 on the surface while retaining a ductile core at HRC 35-40. The assembly station press-fits bushings into link bores, installs pins with molybdenum disulfide grease, and performs rotational torque testing to verify consistent friction values. Final inspection includes 100% dimensional verification, magnetic particle crack detection, and surface hardness spot testing.

YinTai Parts has dedicated 35 years to the research, development, and manufacturing of excavator and bulldozer undercarriage components. Our 20,000-square-meter factory in Quanzhou, Fujian Province houses 6 dedicated production lines operated by over 150 skilled technicians. We maintain ISO9001:2008 and CE certifications, supported by an in-house metallurgical laboratory equipped with direct-reading spectrometer, universal tensile testing machine, Rockwell and Brinell hardness testers, and magnetic particle inspection systems. Annual production exceeds 50,000 track chain assemblies for distribution to over 50 countries across Southeast Asia, the Middle East, Africa, South America, and Eastern Europe. Our Xiamen sales and logistics center coordinates weekly container shipments from Xiamen Port, providing complete export documentation and marine insurance services.

The D65/D85 dry track chain assembly is engineered for medium-to-large bulldozer applications where operational temperatures or cost considerations favor dry chains over sealed alternatives. In mining and quarry environments, the grease-lubricated design tolerates sustained high ambient temperatures without seal degradation. For heavy construction and infrastructure development, the 216mm pitch provides stable traction during ripping and heavy dozing on mixed soil and blasted rock surfaces. Agricultural land reclamation operations benefit from the chain's resistance to soil compaction forces and embedded rock impact. Fleet operators managing mixed machine fleets appreciate the ability to source both dry and sealed track chain variants from a single factory, simplifying procurement and maintaining consistent quality standards across all replacement undercarriage components.

• Komatsu D65, D85, D85ESS bulldozer undercarriage systems
• Chinese TY230 bulldozer track chain replacement
• Mining overburden removal and high-temperature slag handling
• Heavy construction earthmoving and site preparation
• Quarry material handling and blasted rock dozing
• Agricultural land reclamation and deep ripping operations

Q: What is the service life of a dry track chain compared to a sealed lubricated chain?
In standard operating conditions, dry track chains typically achieve 60-70% of the service life of equivalent SALT chains. However, in high-temperature environments exceeding 80°C or when operating budgets favor lower initial cost, dry chains provide the most cost-effective solution with simplified maintenance requirements.

Q: How often should track chain tension be adjusted?
Track tension should be checked every 250 operating hours or weekly during continuous operation. Proper tension prevents premature sprocket tooth wear, reduces link-to-bushing friction, and extends overall chain life by up to 15%.

Q: Can I install this dry chain on machines originally equipped with SALT chains?
Yes, provided the dimensional specifications (pitch, bushing diameter, pin diameter, link height) match the existing sprocket profile. Our sales engineers can verify compatibility based on your machine model and serial number.

Q: What is the typical lead time for bulk orders?
Standard orders ship within 7-30 days depending on quantity. For orders exceeding 100 assemblies, production scheduling is confirmed within 48 hours with weekly progress updates provided throughout manufacturing.

Q: Do you offer technical support for installation and maintenance?
We provide detailed installation manuals, video technical support, and 24-hour online assistance. Our engineering team can also conduct remote consultations for fleet maintenance program optimization.

Each D65/D85 track chain assembly completes a comprehensive 6-point quality protocol: spectrometer chemical verification, CMM dimensional inspection, 5-point Rockwell hardness testing, magnetic particle surface flaw detection, assembly rotational torque verification, and final visual inspection. Completed chains are wrapped in anti-corrosion VCI paper, secured to ISPM-15 compliant fumigated wooden pallets, and enclosed in heavy-duty export-grade plywood crates. Each shipment package includes a detailed quality certificate with heat lot traceability and dimensional conformance report. Backed by 35 years of manufacturing excellence and an 18-24 month warranty, YinTai provides distribution partners with undercarriage solutions that combine dependable quality with competitive factory-direct value.