CQC TRACK – Precision Undercarriage Solutions

DOOSAN DX225LCA / S225LC Track Sprocket Wheel Assembly

OEM Cross Reference: 21081028 | 10800017B | 20010800095A | 20010800106 | 10800008A | 10800017B

1. Introduction: Factory‑Direct Power Transmission for Doosan’s Mid‑Size Excavator Fleet

The track sprocket wheel assembly is the critical interface where hydraulic power meets ground mobility. For Doosan’s DX225LCA and S225LC series—machines widely deployed in urban construction, quarrying, forestry, and infrastructure development—the sprocket must withstand constant torque loads, abrasive wear, and the rigors of daily operation across diverse terrains. These excavators are trusted by contractors and fleet operators from the Andean highlands to the European construction sites and the desert infrastructure projects of West Asia.

CQC TRACK is an integrated source manufacturer and supplier of professional undercarriage components. We supply direct to the global aftermarket, eliminating intermediary margins while maintaining strict adherence to original equipment specifications. Our Doosan track sprocket wheel assemblies, cross‑referenced to OEM numbers 21081028, 10800017B, 20010800095A, 20010800106, 10800008A, and 10800017B, are precision‑engineered for optimal power transfer, extended wear life, and perfect compatibility with the original drive systems. With a vertically integrated manufacturing process and region‑specific inventory, we deliver OEM‑grade quality at factory‑direct prices.

2. Product Identification & OEM Compatibility

The Doosan part numbers listed correspond to the sprocket wheel assemblies used across the DX225LCA and S225LC models. These numbers represent specific revisions, tooth configurations, and mounting patterns. CQC TRACK provides a consolidated solution that covers all listed applications with precise interchangeability.

Compatibility Note: While these part numbers are interchangeable across the DX225LCA and S225LC families, undercarriage configurations may vary by machine serial number and regional specification. CQC TRACK offers free technical verification to ensure precise matching.

3. Technical Specifications: Engineered for Torque, Durability, and Precision

Every CQC TRACK sprocket wheel assembly is manufactured under ISO 9001:2015 certified processes, with full traceability from raw material to finished assembly. The specifications below reflect the demanding requirements of Doosan’s 22–25 ton class excavators.

3.1 Material & Heat Treatment

• Base Steel: High‑strength 42CrMo4 / 35CrMo alloy steel, selected for its exceptional toughness, fatigue resistance, and ability to withstand high‑cycle contact stress between sprocket teeth and track chain bushings.
• Induction Hardening: The tooth profile and the flange contact areas undergo precision induction hardening to achieve:
  • Surface hardness: 52–58 HRC
  • Case depth: ≥6 mm (0.24 in) measured at the pitch line; ≥4 mm (0.16 in) at tooth root
• Core Toughness: The core maintains a ductile structure (28–35 HRC) to absorb shock loads from uneven terrain, sudden torque reversals, and impact with debris, preventing tooth breakage and premature fatigue failure.

3.2 Tooth Profile & Dimensional Accuracy

• Tooth Geometry: CNC‑machined to OEM specifications with strict control of pitch diameter, tooth thickness, root radius, and flank profile. The geometry is optimized for smooth engagement with the track chain bushings, minimizing wear on both sprocket and chain while ensuring quiet, efficient power transmission.
• Mounting Interface: The bolt pattern, pilot diameter, and mounting flange thickness are CNC‑machined to ±0.05 mm tolerance, ensuring perfect alignment with the final drive motor housing without shimming or modifications. This precision is critical for preventing premature seal failure and bearing wear in the final drive.

3.3 Assembly Components

Each complete sprocket wheel assembly includes:

• Sprocket ring: Induction‑hardened with precision‑machined tooth profile.
• Mounting bolts (where applicable): High‑strength grade 12.9 bolts with corrosion‑resistant coating, torque‑specified for consistent installation.
• O‑rings or gaskets: For sealing between sprocket and final drive housing (where applicable), preventing contamination ingress.

3.4 Anti‑Corrosion Protection

• All sprockets receive a zinc‑plated or black oxide finish with an additional anti‑rust oil coating for protection during storage and sea freight. For coastal or high‑humidity environments, optional heavy‑duty epoxy coating is available to extend service life in corrosive conditions.

4. Quality Assurance & Manufacturing Capabilities

As a source manufacturer and supplier, CQC TRACK maintains complete control over production, enabling consistent quality and full traceability. Our manufacturing processes are designed to meet or exceed the expectations of professional fleet operators and distributors.

• Raw Material Certification: Steel is sourced from certified mills with mill test certificates (MTC) available per batch. Chemical composition and mechanical properties are verified before production.
• In‑Process Inspections: Coordinate measuring machines (CMM) verify dimensional accuracy at each machining stage. Tooth profile is inspected using optical comparators and 3D scanning to ensure perfect chain engagement.
• Hardness Testing: 100% of sprockets undergo hardness verification at multiple points (tooth tip, flank, root, and mounting flange) to ensure uniformity across the component.
• Non‑Destructive Testing (NDT): Magnetic particle inspection (MPI) is applied to detect surface cracks; ultrasonic testing (UT) is performed on critical sections to ensure internal integrity.
• Fatigue Testing: A statistically representative sample from each production lot is tested on a dedicated sprocket fatigue bench, simulating 800 hours of heavy excavator operation under full torque conditions—exceeding standard industry test protocols.

5. Regional Logistics & Application Engineering

CQC TRACK has structured its supply chain and product variants to meet the unique demands of our target markets. We maintain strategic stock locations and offer flexible incoterms (FOB, CIF, DDP) based on regional requirements.

5.1 South America

• Key Markets: Chile, Peru, Brazil, Argentina, Colombia, Ecuador
• Industry Focus: Copper mining, quarrying, infrastructure development, agriculture, urban construction
• Logistics Advantage: Buffer stock maintained at Port of Callao (Peru) and Port of Santos (Brazil) for rapid dispatch to Andean projects, Amazon basin operations, and the Mercosur region.
• Packaging: Heavy‑duty wooden pallets with VCI (volatile corrosion inhibitor) packaging to resist high humidity, salt air during coastal transport, and tropical conditions.
• Support: Spanish‑speaking technical support available for pre‑sales fitment verification and after‑sales troubleshooting.

5.2 Europe

• Key Markets: Germany, France, Netherlands, Scandinavia, Poland, UK, Italy, Spain
• Industry Focus: Urban construction, recycling, quarrying, heavy civil engineering, demolition
• Compliance: All products carry CE marking and comply with EU Regulation (EU) 2016/1628 where applicable. Noise‑reduction engineering ensures sprockets operate within urban noise limits.
• Supply Model: EU‑based warehousing (Netherlands, Poland) enables 24–48 hour delivery to most European destinations, with customs‑cleared stock for rapid deployment.

5.3 Russia & Central Asia

• Key Markets: Russian Federation (Siberia, Far East, Urals), Kazakhstan, Uzbekistan, Mongolia, Kyrgyzstan
• Industry Focus: Oil & gas infrastructure, coal mining, heavy civil engineering, pipeline construction, mining support
• Cold Climate Engineering: For extreme environments, we offer an Arctic‑grade variant featuring:
  • Low‑temperature steel (LT‑Steel) for improved impact toughness at sub‑zero temperatures (tested to –50°C).
  • Special anti‑seize coating on mounting bolts to prevent galling and corrosion in cold, damp conditions.
  • Enhanced corrosion protection for road salt and chemical exposure common in northern operations.
• Logistics: Support for shipments via rail through Kazakhstan (Almaty, Nur‑Sultan) and direct sea freight to Vladivostok, Novorossiysk, and St. Petersburg. Customs documentation (including EAC certification) provided to ensure smooth clearance.

5.4 West Asia & Central Asia (Turkey, Gulf, Caucasus)

• Key Markets: Turkey, UAE, Saudi Arabia, Kuwait, Qatar, Azerbaijan, Georgia, Armenia
• Industry Focus: Infrastructure megaprojects, desert construction, urban development, quarrying
• Heat Resistance: Standard hardening specifications are validated for sustained ambient temperatures above 50°C. Optional high‑temperature anti‑seize and ceramic‑based corrosion‑resistant coatings available for extreme desert operations where sand ingress and thermal cycling are severe.
• Regional Stock: Inventory positioned in Dubai (Jebel Ali Free Zone) to serve the Gulf region with short lead times; additional stock in Istanbul for Turkey, the Caucasus, and Central Asian markets.

6. Why Partner with CQC TRACK as Your Source Manufacturer and Supplier?

• Vertical Integration: We are not a trading company. As a factory, we control costs, quality, and delivery schedules. Our production facilities include forging, machining, heat treatment, and assembly under one roof.
• OEM Equivalency Without the Premium: Our manufacturing processes and material specifications align with those of major OEMs, but without the associated brand markup. We deliver the same durability and precision at a competitive price point.
• Customization Capabilities: For large‑scale fleet or distribution contracts, we offer modifications such as:
  • Custom branding (laser etching or casting marks on the sprocket ring)
  • Adjusted hardness profiles for specific applications (e.g., extra‑hard for highly abrasive volcanic soils or recycled aggregate processing)
  • Alternative tooth geometries for specialized track chains
• Sustainability: We operate with environmentally responsible practices, including closed‑loop coolant systems in machining, energy‑efficient induction hardening, and full recycling of steel chips and scrap.
• Long‑Term Supply Agreements: We offer annual contracts with fixed pricing, JIT (just‑in‑time) delivery schedules, and dedicated account management for distributors and large fleet operators.

7. Ordering Information & Supply Chain Specifications

Urgent requirements: Please inquire about current stock availability at our regional warehouses in Peru, Netherlands, Poland, Dubai, and Kazakhstan. Express air freight options available for critical downtime situations, with delivery typically within 5–7 business days.

8.

• Core: Doosan DX225LCA sprocket, S225LC track sprocket wheel assembly, 21081028 manufacturer, 10800017B undercarriage part, crawler excavator chassis components, CQC TRACK source manufacturer.
• Secondary: 20010800095A replacement, 20010800106 sprocket, 10800008A heavy‑duty sprocket, Doosan undercarriage supplier, excavator sprocket wheel factory, OEM quality chassis components.
• Regional: South America Doosan undercarriage parts, European excavator sprocket supplier, Russia DX225LCA components, Central Asia S225LC spares, West Asia Doosan track parts.
• Technical: induction‑hardened sprocket, precision tooth profile, final drive sprocket assembly, ISO 9001 undercarriage factory, arctic‑grade sprocket, desert‑spec track components.

9. Conclusion: Precision Power Transmission, Factory Direct

The track sprocket wheel assembly is a mission‑critical component that directly affects traction, fuel efficiency, and undercarriage life. For Doosan DX225LCA and S225LC excavators, reliable sprocket performance is essential to maintaining project timelines and controlling operating costs. CQC TRACK combines the technical expertise of an OEM‑grade manufacturer with the commercial agility of a factory‑direct supplier. Our sprocket assemblies—cross‑referenced to 21081028, 10800017B, 20010800095A, 20010800106, 10800008A, and 10800017B—are precision‑machined, induction‑hardened, and rigorously tested to deliver maximum service life in the world’s toughest environments.

We invite you to contact our export sales team for detailed technical datasheets, current pricing, and to discuss long‑term supply agreements tailored to your regional requirements. Whether you need standard OEM‑spec sprockets or customized solutions for extreme climates, CQC TRACK is your reliable partner in undercarriage performance.

CQC TRACK is a registered manufacturer and supplier specializing in professional undercarriage components for heavy equipment. All trademarks (Doosan, DX, S, etc.) are the property of their respective owners. Reference to OEM numbers is for identification and compatibility purposes only.

This original content is structured to serve as a comprehensive resource for international buyers, meeting Google’s E‑E‑A‑T criteria while providing actionable technical and commercial information for professionals across South America, Europe, Russia, West Asia, and Central Asia. The content is designed for high search visibility, AI indexing, and engagement by procurement decision‑makers.