SANY 14349644 SY330 SY335 Track Sprocket Wheel Group / Final Drive Sprocket Assembly

China OEM Quality Undercarriage Part Supplier and Source Manufacturer / CQC TRACK

Technical White Paper | Document ID: CQC-SANY-SPROCKET-0417 | Version: 1.0
Industry Segment: Mining | Heavy Construction | Quarrying | Infrastructure | Earthmoving
Target Machine Models: SANY SY330 Series, SANY SY335 Series (including SY335C-8, SY335H, SY335C Stage III)
OEM Part Number Reference: 14349644

1. Executive Summary

The SANY 14349644 Track Sprocket Wheel Group / Final Drive Sprocket Assembly represents a mission-critical power transmission component within the undercarriage system of SANY SY330 and SY335 series crawler excavators—machines operating in the 31–34 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 group must endure extreme torsional stresses, continuous abrasive contact with track chain bushings, and severe impact loads inherent to heavy-duty duty cycles.

SANY Heavy Industry Co., Ltd. has emerged as a dominant global force in construction equipment manufacturing, ranking among the world‘s top excavator producers with a significant international market presence. The SY330 and SY335 series excavators embody SANY’s engineering philosophy of high efficiency, fuel economy, and operational reliability across diverse applications.

CQC TRACK (operating under HELI Machinery Manufacturing Co., Ltd.), a certified ISO 9001:2015 source factory based in Quanzhou, Fujian Province—a premier industrial cluster for construction machinery manufacturing—manufactures this precision-engineered drive component as a vertically integrated producer. Through closed-die hot forging from premium alloy steels, precision CNC machining to ISO 2768-mK tolerances, advanced induction heat treatment achieving 58–63 HRC surface hardness, and stringent quality management protocols, CQC TRACK delivers sprocket assemblies engineered for 1:1 mechanical interchangeability with SANY 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 SANY 14349644 Track Sprocket Wheel Group / Final Drive Sprocket Assembly, detailing CQC TRACK’s engineering philosophy, material metallurgy, manufacturing protocols, quality assurance frameworks, and global application-specific considerations.

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 14349644 sprocket is a precision-engineered component designed specifically for SANY excavators, ensuring reliable power transmission and durability in heavy-duty construction environments. The term refers to the integrated component—the sprocket assembly (also called drive wheel assembly)—compatible with the SANY SY330 and SY335 excavator models. It is the part of the undercarriage system that engages the track chain and transfers torque from the final drive motor to the track links.

3. Target Machine Technical Specifications

Understanding the machine platforms for which this sprocket is designed provides critical context for evaluating component performance requirements. The SANY SY330 and SY335 series represent SANY‘s medium-to-large excavator product line, renowned globally for fuel efficiency, digging force, and operational reliability across mining, construction, and quarrying applications.

3.1 SANY SY335 Series Specifications

The SY335 series is SANY’s 33–34 ton class medium excavator, primarily applicable to mining and medium-to-large-scale earth-rock operations. Multiple variants exist to serve different regional markets and emissions standards.

SY335C-8: This 33-ton class crawler backhoe excavator is primarily applicable to mining and medium-to-large-scale earth-rock operations. It features a positive flow hydraulic system and electronic control system with energy-saving characteristics. The bucket digging force is 220 kN, with a maximum digging radius of 10,875 mm. The chassis adopts an extended reinforced track frame, reducing ground pressure and improving passability.

SY335H: Operating weight 33.5 metric tons with 201 kW (270 hp) engine power. Features include three working device length options for flexibility, configurable hydraulic setup for optimized productivity, and excellent maneuverability for its size. Ideal for urban construction and medium excavation with reliable performance in varied terrain.

SY335C (Stage III): Operating weight 34.3 tons with Isuzu GH-6HK1 engine (displacement 7.79L) producing 190.5 kW. Features 2 carrier wheels on each side and 9 track rollers on each side. Fuel tank capacity 540L, hydraulic tank 380L. Standard boom length 6.15m, standard stick length 3.2m.

3.2 SANY SY330 Series Specifications

The SY330 series is SANY’s 30–31 ton class heavy-duty excavator designed for mining applications.

SY330H: A new-generation 30-ton super hydraulic excavator for mining produced by SANY Heavy Machinery, designed particularly for heavy-duty mining conditions to improve customer investment return. Advantages include “super excellent performance, super high adaptability, super long service life and super low maintenance cost.” Features 212 kW engine power, 2.0 m³ bucket capacity, 6.15 m boom length, 2.9 m standard arm, and 800 mm triple grouser track shoes.

SY330 General: Operating weight 32,500 kg with 2.0 m³ bucket capacity. Engine power 210 kW at 1,900 rpm. Travel speed 6.0/3.5 km/h (high/low) with 70% gradeability and 60.3 kPa ground pressure. Transport dimensions: length 10,700 mm, width 3,190 mm, height 3,470 mm. Swing speed 9.5 rpm with bucket digging force 192.7 kN and arm digging force 172.2 kN.

3.3 SY335 Series Variant Overview

The so-called “35-ton excavators” from SANY typically range between 33 and 37 metric tons, offering robust hydraulic performance, advanced fuel efficiency systems, and adaptability to different attachments and working conditions. Models in this weight class include the SY335C (33.5 metric tons, 201 kW), the 33/35 Ural spec (~35 metric tons, 265 hp) built for harsh environments including cold climates, and the SY365H (36 metric tons, 265 hp) with 5–10% fuel efficiency improvement via Intelligent Fluid Management System.

4. Functional Role in the Undercarriage System

In the track chassis architecture of SANY SY330 and SY335 excavators, the 14349644 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 31–34 metric tons with drawbar pulling forces sufficient for steep gradeability and travel speeds up to 6.0 km/h, the sprocket must withstand static and dynamic loads exceeding 34 metric tons while maintaining precise engagement geometry across thousands of operating hours in high-abrasion environments.

The travel assembly of SANY excavators consists of a travel motor, reducer, drive wheel, crawler, tensioning device, and other components. These parts work together to realize the excavator’s traveling function.

5. Corporate Profile: CQC TRACK (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 a leading manufacturer and global supplier of heavy-duty undercarriage components, operating with full vertical integration. 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 CQC TRACK brand symbolizes dedication to Quality, Commitment, and Crawler excellence—representing a product line built for resilience, engineered to endure the most abrasive and high-impact environments in mining, quarrying, and major infrastructure projects. The company specializes in the four main undercarriage categories: rollers, idlers, sprockets, and track links.

5.2 Core Manufacturing Capabilities & Technological Infrastructure

CQC TRACK‘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

CQC TRACK utilizes premium alloy steels including 55Mn, 50Mn, 42CrMo, 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. Large-tonnage forging presses are employed for optimal grain flow in critical components.

5.2.2 Precision CNC Machining Centers

A battery of modern CNC turning centers, vertical machining centers, and robotic welding systems perform 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

CQC TRACK‘s dedicated facility features computer-controlled carburizing furnaces and induction hardening lines that ensure consistent case depth. 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 of 58–63 HRC with 7–10 mm case depth for exceptional wear resistance.

5.2.4 Rigorous Quality Control & Testing

Every component undergoes stringent quality assurance, including:

The company employs comprehensive quality control measures, ensuring that every sprocket wheel assembly meets rigorous global standards before leaving the factory.

5.3 OEM & ODM Service Model

CQC TRACK serves as: an OEM supplier (direct manufacturing partner for major excavator brands), an aftermarket source (primary supplier to distributors, dealership networks, and large end-users), and a vertical integrator (full in-house control from material selection through final assembly).

5.4 Global Export & Logistics Infrastructure

CQC TRACK 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, South America, Southeast Asia, Russia, Central Asia, South Africa, South Korea, and the Middle East. The company maintains established supply channels across major global markets, with additional market presence in North America, Australia, and the Middle East.

6. International Affairs Department & Technical Liaison

The International Affairs Department serves as the technical and commercial interface between CQC TRACK‘s factory capabilities and global client procurement requirements. Within this department, dedicated international sales engineers provide:

• Technical Consultation: Engineering guidance on component selection, compatibility verification for SANY SY330/SY335 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, CQC TRACK maintains multiple international sales communication channels. The company’s website (www.cqctrack.com) serves as the primary portal for product information and contact access.

CQC TRACK stands as a certified source manufacturer with full vertical integration, advanced heat treatment capabilities, rigorous quality assurance protocols, and comprehensive global supply chain infrastructure. Their components are engineered to meet or exceed OEM specifications, ensuring reliable performance across the world‘s most demanding operational environments.

7. Material Science & Technical Specifications

7.1 Material Specifications

The sprocket material is forged high-carbon, high-manganese alloy steel (50Mn or 42CrMo). The induction-hardened tooth profile achieves 58–63 HRC surface hardness with 7–10 mm case depth. The manufacturing process combines closed-die forging with precision CNC machining of tooth profile and mounting surfaces.

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. The precision-machined tooth profile ensures exact pressure angle and pitch for non-slip engagement with track bushings. The forging process creates superior grain structure essential for handling shock loads. Splined or bolted mounting to the output planetary carrier provides solid, non-slip torque transmission.

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 makes it ideal for harsh outdoor environments including mining and quarrying operations.

8. Quality Certification and Compliance

CQC TRACK maintains internationally recognized quality certifications and compliance standards, ensuring each 14349644 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

CQC TRACK‘s ISO 9001:2015 certified manufacturing processes ensure that every component meets stringent quality standards before shipment.

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 floating face seals 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 SANY OEM specifications using calibrated torque wrench
• Verify seal seating and proper compression of the floating face seal system
• Rotate assembly to confirm smooth engagement and absence of binding or interference

9.3 Wear Monitoring & Replacement Threshold

• Regularly inspect sprocket tooth profile for asymmetric or “hooked” wear patterns—indicates excessive wear requiring replacement
• 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

A critical maintenance consideration: the sprocket and track chain are designed to wear together. Installing a new sprocket on a severely worn chain (or vice versa) causes accelerated, destructive wear due to pitch mismatch, leading to rapid failure of both components.

9.4 Matching Component Recommendation

CQC TRACK recommends using the 14349644 sprocket wheel in conjunction with matched CQC TRACK 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.

9.5 Common Failure Modes

Maintenance Recommendations:

• Sprocket Wear Monitoring: Inspect teeth regularly for “hooked” or sharply pointed profile
• Oil Analysis: Periodic sampling detects internal wear particles or contamination
• Seal Integrity: Regular visual inspection for oil leaks around sprocket hub and input shaft

10. Global Market Deployment

CQC TRACK‘s undercarriage components, including the SANY 14349644 Track Sprocket Wheel Group, are supplied to all over the world, supporting heavy machinery fleets across major mining and construction hubs.

10.1 Strategic Regional Application

CQC TRACK components are engineered for diverse operational environments across major global markets:

10.2 SANY SY335 Mining Applications

The SY335 excavator is widely used in earthwork, road building, stone exploitation, civil engineering, and mine construction. The efficient engine produces more power with less fuel consumption. The Dynamic Optimized Matching Control System provides real-time match between the engine power and the main pump, which reduces the hydraulic element’s response time and lowers internal power loss. The strengthened and optimized boom, arm, and bucket provide considerable working range and depth while maintaining powerful digging force.

SANY excavators, distributed globally, are ideal for arduous mining applications such as iron ore, chrome, and manganese. With an emphasis on cost-effectiveness, the SANY SY335C medium excavator features an auto deceleration system that reduces fuel consumption by 5% to 10%.

10.3 Application Sectors

The SANY 14349644 sprocket wheel is deployed across the following industry sectors:

11. Conclusion

The SANY 14349644 Track Sprocket Wheel Group / Final Drive Sprocket Assembly manufactured by CQC TRACK (HELI Machinery Manufacturing Co., Ltd.) represents a technically advanced undercarriage component specifically engineered for the high-load demands of SANY SY330 and SY335 series crawler excavators—machines operating in the 31–34 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 (50Mn, 55Mn, 42CrMo), precision CNC machining to ISO 2768-mK standards, and advanced induction hardening technologies achieving 58–63 HRC surface hardness with 7–10 mm case depth to deliver OEM-equivalent performance and dimensional accuracy.

CQC TRACK‘s position as a source factory—with over 20 years of manufacturing experience and full vertical integration from material selection through final assembly—ensures complete process traceability and quality control. The company’s OEM/ODM capabilities allow for custom solutions tailored to specific mining and construction environments.

With established supply infrastructure serving South America, Africa, Russia/CIS, the Middle East, Europe, North America, Southeast Asia, and South Korea, CQC TRACK 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 CQC TRACK as a trusted source for SANY SY330/SY335 undercarriage replacement components worldwide.

The SANY SY330 and SY335 excavators represent significant capital investments that require precision-engineered undercarriage components to maintain productivity and minimize downtime. CQC TRACK stands as a certified source manufacturer with full vertical integration, advanced heat treatment capabilities, rigorous quality assurance protocols, and comprehensive global supply chain infrastructure, engineered to meet or exceed OEM specifications and ensure reliable performance across the world’s most demanding operational environments.

12. Technical Inquiries & Procurement

Manufacturer: HELI Machinery Manufacturing Co., Ltd. (CQC TRACK)
Brand: CQC TRACK
Location: Quanzhou, Fujian Province, China
Website: www.cqctrack.com
Certifications: ISO 9001:2015 Certified

For technical inquiries, product specifications, quotations, or to request sample approval for the SANY 14349644 Track Sprocket Wheel Group / Final Drive Sprocket Assembly, please contact the International Sales Department:

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

CQC TRACK welcomes inquiries from procurement specialists, fleet maintenance engineers, equipment managers, and mining operators seeking to optimize total cost of ownership for SANY SY330 and SY335 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. (CQC TRACK). All OEM part numbers and machine model references are for identification and compatibility purposes only. CQC TRACK is an independent manufacturer of aftermarket and OEM-quality components. All trademarks remain the property of their respective owners. Specifications are subject to change without notice.