Product Definition: We manufacture Doosan track link assemblies, the load-bearing steel chain that connects track shoes and transfers drive force through the undercarriage system.
Service Advantage: Factory-direct manufacturing with full OEM replacement services for Doosan excavator fleets and independent distributors worldwide; no middlemen, direct technical support.
Problem Solved: Hardened link bodies resist elongation, pin bore wear, and cracking, preventing sudden track pitch failure and unplanned downtime in tough digging conditions.
Why Us: Over 20 years in undercarriage production, with ISO9001 and SGS-certified processes ensuring stable metallurgy and dimensional accuracy batch after batch.
Technology: 35MnB forged steel, induction hardening to 50-58 HRC, and precision pin bore machining deliver long service life under heavy shock loads.
Core Selling Points
- Premium 35MnB Material: Forged 35MnB steel provides high tensile strength and resists link elongation under heavy loads and abrasive operating conditions.
- Deep Quenching/Heat Treatment: Induction hardening produces 50-58 HRC on rail surfaces and pin bores, extending wear life where roller contact is severe.
- 100% QC Inspection: Each assembly passes dimensional checks, hardness verification, and pin/bushing fit testing before packaging and export shipment.
- OEM Capabilities: We manufacture from OEM drawings, samples, or part numbers, matching pitch, pin diameter, and bolt patterns for direct replacement.
Our catalog of Doosan Track Link Assembly includes various specifications, fully compatible with Doosan excavators and bulldozer-class undercarriage systems.
Why Choose Dingtai?
Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB forged steel |
| Hardness HRC | 50-58 HRC on rail surfaces and pin bores |
| Process | Forging, induction hardening, precision CNC machining |
| Certification | ISO9001, SGS |
| Warranty | 12 months / 2,000 working hours |
OEM & Customization
We produce track link assemblies from customer drawings, samples, or original Doosan part numbers, matching OEM pitch, pin diameter, and bolt hole specifications exactly.
Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Crawler Excavator | Doosan | DX140LC, DX180LC, DX225LC, DX300LC, DX340LC |
| Heavy/Production Excavator | Doosan | DX420LC, DX490LC, DX530LC, DX700LC |
| Bulldozer/Crawler Undercarriage | Doosan / Equivalent OEM | Custom chain pitch and pin diameter by drawing |
Delivery & Logistics
We ship FOB or CIF from major Chinese ports with export-standard rust-proof packaging, factory-direct pricing, and flexible MOQ for urgent or bulk orders.
Technical Features
Precision-machined pin bores create uniform interference fit with case-hardened pins, preventing internal wear and reducing track pitch elongation under load.
Deep induction-hardened rail surfaces resist roller contact fatigue; the core remains tough to absorb impact without fracturing or link cracking.
Optional sealed and lubricated track assemblies retain oil at the pin-bushing interface, reducing internal friction and extending service intervals in abrasive material.
Applications
- Mining and quarrying
- Road construction
- Heavy civil earthmoving
- Demolition and site clearing
- Forestry and land reclamation
Frequently Asked Questions
What is the minimum order quantity for Doosan track link assemblies?
MOQ is typically one complete track link assembly or a mixed container of models; contact us for current stock and consolidation options.
What is the delivery time after order confirmation?
Stock assemblies ship within 7 days. Custom production generally requires 25–35 days depending on quantity and heat treatment schedule.
How deep is heat treatment on track link rail surfaces?
Surface hardness reaches 50–58 HRC, with a hardened case depth typically 3–6 mm on rail surfaces and pin bores.
What warranty policy applies?
We provide 12 months or 2,000 working hours against manufacturing defects, excluding normal wear and misuse.
Can you match Doosan OEM part numbers?
Yes, provide the original Doosan part number or dimensional drawing; we match pitch, pin diameter, and bolt spacing.
Do you provide samples before bulk production?
We can supply pre-production sample links or complete sample assemblies for dimensional and hardness approval before mass production.
Maintenance Guide
- Inspect Track Pitch: Measure pitch across five links; replace when elongation exceeds OEM limits, typically 2–3%.
- Check Sealed Joints: Inspect pins and bushings for oil leakage; dry joints accelerate internal wear and require immediate service.
- Torque Track Shoe Bolts: Tighten to Doosan specification and re-torque after the first 50 operating hours.
- Monitor Rail Wear: Replace links when rail height reaches wear limit or link bodies show visible cracks or deep gouging.