Kobelco LC51D01008P1 SK330 SK350 Track Sprocket Wheel Assembly

Heavy-Duty Crawler Excavator Undercarriage Parts | Manufacturer & Source Factory: CQCTRACK (HELI MACHINERY MANUFACTURING CO., LTD.)

Technical White Paper | Document ID: CQCT-KOBELCO-SPROCKET-0326 | Version: 1.0
Industry Segment: Mining | Heavy Construction | Quarrying | Infrastructure | Earthmoving
Target Machine Models: Kobelco SK330-8, SK330-10, SK330-11, SK350LC-8, SK350LC-10, SK350LC-11E
OEM Part Number Reference: LC51D01008P1

1. Executive Summary

The Kobelco LC51D01008P1 Track Sprocket Wheel Assembly represents a mission-critical power transmission component within the undercarriage system of Kobelco SK330 and SK350 series crawler excavators—machines operating in the 33–39 metric ton class across mining, quarrying, heavy construction, and large-scale earthmoving applications. As the interface that converts hydraulic power from the final drive into tractive force for track propulsion, the sprocket wheel must endure extreme torsional stresses, continuous abrasive contact with track chain bushings, and severe impact loads inherent to heavy-duty duty cycles.

HELI Machinery Manufacturing Co., Ltd., operating under the CQCTRACK brand, manufactures this precision-engineered drive component as a vertically integrated source factory. Through closed-die hot forging from premium alloy steels, precision CNC machining to ISO 2768-mK tolerances, advanced induction heat treatment achieving 55–60 HRC surface hardness, and stringent ISO 9001:2015-certified quality management protocols, CQCTRACK delivers sprocket assemblies engineered for 1:1 mechanical interchangeability with OEM specifications while incorporating material and process enhancements for superior durability in the world‘s most demanding operating environments.

This document provides a comprehensive technical exposition of the Kobelco LC51D01008P1 Track Sprocket Wheel Assembly, detailing CQCTRACK’s engineering philosophy, material metallurgy, manufacturing protocols, quality assurance frameworks, and global application-specific considerations across South America, Southeast Asia, Russia, Central Asia, South Africa, South Korea, and Europe.

2. Product Identification and OEM Cross-Reference Matrix

Accurate component identification is the foundational prerequisite for procurement and maintenance operations in heavy equipment management. The following matrix establishes the interrelationship between various reference numbers and their application context.

The LC51D01008P1 sprocket is a precision-engineered component designed specifically for Kobelco excavators, ensuring reliable power transmission and durability in heavy-duty construction environments. It is crafted from high-strength materials and features customizable mounting options to optimize performance while reducing downtime.

3. Target Machine Technical Specifications

Understanding the machine platform for which this sprocket is designed provides critical context for evaluating component performance requirements. The Kobelco SK330 and SK350 series represent Kobelco‘s large excavator product line, renowned globally for fuel efficiency, digging force, and operational reliability across diverse applications.

3.1 Kobelco SK330 Series Specifications

For the SK330-8 variant, the operating weight is approximately 33,800 kg with a rated power output of 197 kW at 2,100 rpm, achieving a maximum digging depth of 7.56 meters and a maximum digging reach of 11.26 meters. The SK330-10 model features operating weights ranging from 34,500 kg to 35,600 kg, with a HINO J08E-UN Tier-3-compliant diesel engine producing 191 kW at 2,100 rpm. The SK330-11, the most recent variant, offers a 210 kW Isuzu engine and an operating weight of 36,300 kg, representing approximately 7% weight increase over the SK330-8 for enhanced stability and digging performance.

3.2 Kobelco SK350LC Series Specifications

The SK350LC-8 variant has an operating weight of approximately 34,700–36,600 kg with 197 kW rated power output and 1.6 m³ bucket capacity. The SK350LC-10 model features operating weights from 35,200 kg to 36,400 kg. The SK350LC-11 delivers 37,000 kg operating weight with 210 kW engine power, while the SK350LC-11E (European variant) ranges from 37,000 kg to 38,600 kg and complies with EU Stage V emissions regulations, featuring an ISUZU 6HK1 engine with 7.790 L displacement.

3.3 Undercarriage Dimension Comparison (SK330 vs. SK350LC)

The SK350LC features a longer undercarriage than the SK330, with an overall crawler length of 4,980 mm compared to 4,650 mm for the SK330, and 48 track shoes per side versus 45 for the SK330. This longer track frame provides enhanced stability and lower ground pressure for heavy digging applications.

4. Functional Role in the Undercarriage System

In the track chassis architecture of Kobelco SK330 and SK350 excavators, the LC51D01008P1 sprocket wheel assembly serves as the primary driver of the undercarriage system, performing the following critical engineering functions:

• Torque Transmission: Converts rotational output from the final drive planetary hub into linear tractive force applied to the track chain, enabling machine propulsion across varied terrain conditions
• Positive Engagement: Maintains consistent tooth-to-chain bushing interface to prevent slippage under extreme operational loads, particularly critical when operating on steep grades up to 70% (35°)
• Wear Distribution: Provides a replaceable wear surface that protects the more expensive final drive assembly from premature failure, significantly reducing total cost of ownership over the machine‘s lifecycle
• Track Alignment: Maintains proper track tracking and tension distribution across the entire undercarriage system, preventing premature wear on rollers, idlers, and track chains

For the target machine class operating at 33–39 metric tons with drawbar pulling forces reaching 316 kN and travel speeds of 5.6 km/h, the sprocket must withstand static and dynamic loads exceeding 39 metric tons while maintaining precise engagement geometry across thousands of operating hours in high-abrasion environments.

The sprocket’s corrosion-resistant steel construction and wear-resistant blackened tooth treatment ensure prolonged durability in harsh construction environments, outperforming standard sprockets by up to 30% in abrasive conditions while maintaining structural integrity under heavy loads.

5. Corporate Profile: CQCTRACK (HELI MACHINERY MANUFACTURING CO., LTD.)

5.1 Company Evolution & Strategic Positioning

Founded in the late 1990s, HELI MACHINERY has grown in parallel with China‘s construction machinery boom, systematically evolving into one of the top three undercarriage component manufacturers in the Quanzhou region—a key supply cluster for global earthmoving equipment. Rooted in the industrial hub of Quanzhou, Fujian Province, a region renowned for its concentration of mechanical manufacturing, HELI serves the global market as a proficient OEM (Original Equipment Manufacturer) and ODM (Original Design Manufacturer) partner.

The CQCTRACK brand symbolizes dedication to Crawler, Quality, and Commitment—representing a product line built for resilience, engineered to endure the most abrasive and high-impact environments in mining, quarrying, and major infrastructure projects.

5.2 Core Manufacturing Capabilities & Technological Infrastructure

CQCTRACK‘s manufacturing prowess is built on complete vertical integration and controlled, sequential processes. The company maintains ISO 9001:2015 certification and adheres to internationally recognized quality management standards.

5.2.1 In-House Forging & Material Science

CQCTRACK utilizes premium alloy steels including 52Mn, 55Mn, and 40CrNiMo—grades renowned for high impact strength, fatigue resistance, and superior wear properties. Through strategic control of closed-die hot forging, the company ensures optimal grain flow and material density in component blanks, which is fundamental for impact strength and fatigue life under cyclic loading conditions.

5.2.2 Precision CNC Machining Centers

A battery of modern CNC lathes, milling machines, and drilling centers performs rough and finish machining, ensuring dimensional accuracy to ISO 2768-mK standards and consistent interchangeability across production batches. This precision guarantees that every sprocket wheel maintains exact tooth geometry, mounting interface dimensions, and spline/bore tolerances required for seamless integration with the final drive output shaft.

5.2.3 Advanced Heat Treatment Lines

CQCTRACK‘s dedicated facility features computer-controlled induction hardening and tempering furnaces. The company specializes in achieving deep, uniform case hardness on critical wear surfaces such as sprocket teeth, dramatically extending service life in abrasive mining environments. The induction hardening process applies to the external tooth profiles, achieving surface hardness exceeding 50 RC for exceptional wear resistance.

5.2.4 Rigorous Quality Control & Testing

Every component undergoes stringent quality assurance, including:

• Dimensional inspection using 3D coordinate measurement (CMM) to ISO 2768-mK standards
• Hardness testing (Rockwell C scale) to verify surface and core hardness profiles
• Non-Destructive Testing (NDT) including Magnetic Particle Inspection (MPI) for surface crack detection
• Ultrasonic testing for forging integrity verification
• Run-out testing to verify rotational concentricity

The company employs comprehensive quality control measures, including IQC (Incoming Quality Control), DQC (Design Quality Control), IPQC (In-Process Quality Control), FQC (Final Quality Control), and OQC (Outgoing Quality Control), supported by specialized inspection instruments.

5.3 OEM & ODM Service Model

CQCTRACK‘s position as a source factory—rather than a trading intermediary or consolidator—ensures international buyers receive fully traceable components, from raw material chemistry through final assembly certification. The company’s product portfolio includes compatible components for major brands including Caterpillar, Komatsu, Hitachi, Liebherr, and Kobelco.

5.4 Global Export & Logistics Infrastructure

CQCTRACK serves as a specialized manufacturer and global exporter of heavy-duty undercarriage parts for mining, construction, and quarrying equipment. The company‘s products are supplied to all over the world, including Europe, America, Australia, United States, Germany, Zimbabwe, and United Arab Emirates. The company maintains established supply channels across South America, Southeast Asia, Russia, Central Asia, South Africa, South Korea, and Europe, with additional market presence in Australia, North America, and the Middle East.

6. International Affairs Department & Technical Liaison

The International Affairs Department serves as the technical and commercial interface between CQCTRACK‘s factory capabilities and global client procurement requirements. Within this department, Jack functions as a dedicated international sales engineer, providing:

• Technical Consultation: Engineering guidance on component selection, compatibility verification for Kobelco SK330/SK350 models, and application-specific material recommendations based on operational environment—whether tropical mining, arctic construction, or high-altitude quarrying
• OEM/ODM Project Management: Coordination of custom manufacturing projects from specification review through production, quality inspection, and shipment, including prototype approval and pilot order management
• Supply Chain Coordination: Management of logistics, export documentation, customs compliance, and freight forwarding for international shipments via sea or air freight
• Post-Sale Technical Support: Remote troubleshooting, installation guidance, maintenance consultation, and warranty support

For technical inquiries, product specifications, or to request a quotation, CQCTRACK maintains multiple international sales communication channels. The company’s website (www.cqctrack.com) serves as the primary portal for product information and contact access.

7. Material Science & Technical Specifications

7.1 Material Specifications

The SK330-8 Excavator Sprocket LC51D01008P1 is crafted from high-durability steel alloy with a wear-resistant black oxide treatment, ensuring prolonged durability in harsh construction environments. The corrosion-resistant steel construction and wear-resistant blackened teeth maintain structural integrity under heavy loads, outlasting standard sprockets by up to 30% in abrasive conditions.

7.2 Design Characteristics

The sprocket features precision-engineered teeth and reinforced structural design, enabling it to handle extreme pressures and heavy-duty operations without slippage or deformation. It outperforms generic sprockets in load-bearing capacity by 20% under continuous use. The modular customization design supports adjustable mounting holes for precise shaft alignment and chain tensioning to meet specific machinery requirements.

7.3 Performance Characteristics

Designed for uninterrupted power transmission in construction machinery, the sprocket reliably operates in demanding scenarios like earthmoving, demolition, and heavy-lifting operations. Its robust construction and corrosion-resistant coating make it ideal for harsh outdoor environments.

8. Quality Certification and Compliance

CQCTRACK maintains internationally recognized quality certifications and compliance standards, ensuring each LC51D01008P1 sprocket assembly meets rigorous global requirements:

Compliance Documentation Available:

• Material Test Reports (MTRs) per EN 10204 3.1 standard (factory certificate)
• Dimensional inspection certificates with CMM verification
• Hardness profile test reports with Rockwell C scale measurements
• Third-party inspection verification (upon request)
• Certificate of Conformity for export documentation

9. Installation and Maintenance Guidelines

9.1 Pre-Installation Inspection

• Verify final drive output shaft spline or bolt hole condition for damage, wear, or corrosion
• Inspect Duo-Cone seal rings for contamination, damage, or degradation
• Clean all mating surfaces thoroughly before installation to ensure proper seating
• Confirm sprocket tooth profile matches track chain pitch specifications

9.2 Installation Procedure

• Carefully align splines or bolt pattern with final drive output shaft
• For models with bolt-on configuration, torque mounting bolts to OEM specifications using calibrated torque wrench
• Verify seal seating and proper compression of the Duo-Cone sealing system
• Rotate assembly to confirm smooth engagement and absence of binding or interference
• The modular customization design with multiple mounting holes reduces installation time by 25% compared to non-modular alternatives

9.3 Wear Monitoring & Replacement Threshold

• Regularly inspect sprocket tooth profile for asymmetric or hook-shaped wear patterns
• Measure tooth thickness at standard intervals using a dedicated wear gauge
• Monitor for spalling, cracking, or deformation on tooth surfaces and mounting flange
• Check for unusual noise or vibration during operation as potential indicators of wear
• Replace when tooth tips have worn to specified minimum dimension or when any cracking, spalling, or significant damage is detected

9.4 Matching Component Recommendation

CQCTRACK recommends using the LC51D01008P1 sprocket wheel in conjunction with matched CQCTRACK track chains, bottom rollers, carrier rollers, and front idlers to ensure synchronized wear and maximize entire track circuit service life. Replacing worn sprockets without addressing chain elongation can accelerate wear on new components and compromise undercarriage performance.

10. Global Market Deployment

CQCTRACK‘s undercarriage components, including the Kobelco LC51D01008P1 Track Sprocket Wheel Assembly, are supplied to all over the world, supporting heavy machinery fleets across major mining and construction hubs. The company serves a diverse international clientele, providing reliable, cost-effective alternatives to OEM parts.

10.1 Strategic Regional Application

10.2 Additional Global Markets

Beyond the primary regions detailed above, CQCTRACK maintains supply relationships in Australia (mining and infrastructure), North America (construction and quarrying), the Middle East (infrastructure and oilfield construction), and other international regions.

10.3 Application Sectors

The Kobelco LC51D01008P1 sprocket wheel is deployed across the following industry sectors:

Designed for Kobelco excavators, the LC51D01008P1 sprocket ensures smooth power transmission in applications such as earthmoving, demolition, and heavy-lifting operations. Its robust construction and corrosion-resistant coating make it ideal for harsh outdoor environments.

11. Conclusion

The Kobelco LC51D01008P1 Track Sprocket Wheel Assembly manufactured by CQCTRACK (HELI MACHINERY MANUFACTURING CO., LTD.) represents a technically advanced undercarriage component specifically engineered for the high-load demands of Kobelco SK330 and SK350 series crawler excavators—machines operating in the 33–39 metric ton class across mining, quarrying, heavy construction, and large-scale earthmoving applications.

Manufactured in an ISO 9001:2015-certified facility with complete vertical integration, the component combines closed-die hot forging from premium alloy steels (52Mn, 55Mn, 40CrNiMo), precision CNC machining to ISO 2768-mK standards, advanced induction hardening technologies achieving 55–60 HRC surface hardness, and black oxide corrosion protection to deliver OEM-equivalent performance and dimensional accuracy.

CQCTRACK‘s position as a source factory—with over 20 years of manufacturing experience and recognition as one of the top three undercarriage component manufacturers in the Quanzhou region—ensures complete process traceability and quality control. The company’s OEM/ODM capabilities allow for custom solutions tailored to specific mining and construction environments, including adjustable mounting holes for flexible shaft alignment and chain tensioning.

With established market presence across South America, Southeast Asia, Russia, Central Asia, South Africa, South Korea, and Europe, CQCTRACK has demonstrated its capability to serve as a reliable manufacturing partner for global heavy machinery operators in the mining, construction, and quarrying sectors. The company’s commitment to technological innovation, rigorous quality assurance, and international client support positions CQCTRACK as a trusted source for Kobelco SK330/SK350 undercarriage replacement components worldwide.

12. Technical Inquiries & Procurement

Manufacturer: HELI Machinery Manufacturing Co., Ltd. (CQCTRACK)
Brand: CQCTRACK
Location: Quanzhou, Fujian Province, China
Website: https://www.cqctrack.com
Certifications: ISO 9001:2015 | ISO 14001 | OHSAS 18001 | SGS Certified

For technical inquiries, product specifications, quotations, or to request sample approval for the Kobelco LC51D01008P1 Track Sprocket Wheel Assembly, please contact the International Sales Department:

• Email: cqc@cqctrack.com | j_sales@cqctrack.com | h_sales@cqctrack.com
• WhatsApp: +86 13906095209 | +86 13505004082

CQCTRACK welcomes inquiries from procurement specialists, fleet maintenance engineers, equipment managers, and mining operators seeking to optimize total cost of ownership for Kobelco SK330 and SK350 excavator fleets. The company offers comprehensive OEM/ODM customization services, volume flexibility from small-batch emergency replacements to large-scale fleet maintenance contracts, and complete documentation support including material test reports, dimensional inspection certificates, and third-party verification upon request.

This technical white paper is for informational purposes and reflects the current manufacturing capabilities and product specifications of HELI Machinery Manufacturing Co., Ltd. (CQCTRACK). All OEM part numbers and machine model references are for identification and compatibility purposes only. Specifications are subject to change without notice.