SUMITOMO KSA0826 SH350 Track Sprocket AS – Drive Wheel Assy track excavator undercarriage parts source manufacturers–cqctrack based in quanzhou China

Source precision-engineered Track Drive Sprocket Assemblies (Drive Wheel Assy) for SUMITOMO SH350 excavators. Part KSA0826. Manufacturer of heavy-duty undercarriage components, specializing in sprocket rims, rollers, and track chains. cqctrack, Quanzhou, China.

Comprehensive Technical Overview

1. Component Identification & Function
This product is a Track Drive Sprocket Assembly, also accurately termed a Drive Wheel Assy. It serves as the primary power transfer component within a crawler excavator’s undercarriage system. Mounted to the final drive output shaft, its primary function is to engage with the track chain links (track bushings), converting hydraulic torque from the travel motors into linear track movement, thereby propelling the machine. The suffix “AS” commonly denotes Aftermarket Standard, indicating it is manufactured to meet or exceed original specifications for replacement purposes.

2. Technical Specifications & Compatibility

• OEM Part Number: KSA0826. This is the definitive identifier for the genuine SUMITOMO component.
• Target Application: Specifically engineered for the SUMITOMO SH350 series hydraulic crawler excavator, a robust machine in the 35-ton class commonly deployed in demanding excavation, quarrying, and construction projects.
• Assembly Type: The Drive Wheel Assy typically refers to the complete assembly, which may include the sprocket rim (the toothed wheel) either integral with or bolted to a hub or drive wheel body. It is designed as a direct, bolt-on replacement for the original unit.
• Critical Design Parameters: Performance hinges on precise tooth profile geometry (tooth pitch, face width, contour), hardness depth, and mounting interface dimensions (bolt circle diameter, pilot diameter, shaft bore). Accurate engagement minimizes pitch mismatch, reducing wear on both the sprocket and the costly track chain.

3. Manufacturing Process & Material Engineering
As a specialized undercarriage parts source, manufacturers like cqctrack employ a rigorous production methodology to ensure durability and performance parity with OEM parts.

• Material Selection & Forging: The sprocket core is typically fabricated from a high-tensile, medium-carbon alloy steel (e.g., 40Cr, 42CrMo). Premium versions may start with a forged blank, which provides superior grain flow and fatigue resistance compared to cast alternatives, crucial for handling high cyclic stresses and shock loads.
• Precision Machining: The forging or steel blank undergoes CNC turning, hobbing, and drilling. The tooth hobbing process is critical, requiring high-precision gear hobbers to cut the exact tooth form and pitch. The mounting holes and pilot surfaces are machined to tight tolerances to ensure perfect alignment with the final drive, preventing eccentric running and premature seal failure.
• Heat Treatment: The teeth undergo induction hardening or flame hardening processes. This creates a deep, consistently hard case (typically 55-62 HRC) on the tooth flanks and root for exceptional wear and abrasion resistance, while the core and hub remain tough and ductile to absorb impact loads.
• Optional Design: Many aftermarket assemblies feature a split sprocket or two-piece rim design. This allows for segment replacement, enabling the worn sprocket rim to be changed without removing the entire final drive or hub, significantly reducing downtime and maintenance costs over the machine’s lifecycle.

4. Quality Assurance Protocols
Reliable manufacturers implement a multi-stage inspection regime:

• Dimensional Inspection: Verification of all critical dimensions via calipers, micrometers, and gear tooth verniers. Advanced manufacturers use CMM (Coordinate Measuring Machines) for profile analysis.
• Hardness Testing: Verification of case hardness depth and core hardness using Rockwell or Brinell testers.
• Material Certification: Traceability of steel material with certified Chemical Composition and Mechanical Property reports.
• Fit & Function Testing: Assembly is test-fitted to a master hub/shaft to confirm perfect mating.

5. Supplier Capability: cqctrack, Quanzhou
The designation ”cqctrack based in quanzhou China” points to a specialized industrial manufacturer located in Quanzhou, Fujian Province – a key regional hub in China for the manufacturing of construction machinery and metal components. ”cqctrack” represents a focused brand or division specializing in crawler track undercarriage systems.

This entity operates as a direct manufacturer and supplier, offering:

• Vertical Integration: Likely controlling processes from material sourcing, forging/casting, machining, heat treatment, to final assembly.
• Full Undercarriage Line: Beyond Drive Sprockets (KSA0826), their portfolio typically includes Track Rollers, Carrier Rollers, Idler Wheels, Track Chains (Links & Pins), and Track Shoes.
• Market Positioning: They provide OEM-equivalent and heavy-duty (HD) aftermarket alternatives for a wide range of excavator brands (like SUMITOMO, KOMATSU, CAT, Hitachi, etc.), catering to the global replacement parts market with a balance of performance, durability, and cost-effectiveness.

Conclusion
The Drive Sprocket Assembly (Part No. KSA0826) for the SUMITOMO SH350 is a high-wear, mission-critical component where precision engineering and material science directly impact machine travel efficiency and total undercarriage cost. Sourcing from a dedicated undercarriage manufacturer like cqctrack in Quanzhou provides access to technically validated components manufactured with a specific focus on durability, interoperability, and value for the global aftermarket.