HYUNDAI 81EM10013 81EM10012 81EMDA0010 R210 R225 HX220 HX225 Drive Sprocket Assy / crawler excavator undercarriage parts manufacturer-HELI(cqctrack)

HELI (CQCTRACK): Precision-Engineered Drive Sprocket Assemblies for HYUNDAI R210/R225/HX220/HX225 Crawler Excavators

HELI (operating under the industrial brand CQCTRACK) is a leading global ODM manufacturer and supplier specializing in high-performance undercarriage systems for construction machinery. This technical profile details our engineered Drive Sprocket Assembly, manufactured as direct-performance replacements for HYUNDAI OEM part numbers 81EM10013, 81EM10012, and 81EMDA0010, designed for compatibility with HYUNDAI R210, R225, HX220, and HX225 crawler excavators.

Product Definition & Application Scope

The Drive Sprocket is a fundamental power-transmission component within the excavator’s undercarriage system. It engages directly with the track chain links, converting rotational force from the final drive into linear motion. Inaccurate sprocket geometry or suboptimal material strength leads to rapid, uneven wear of both the sprocket and the costly track chain, increasing downtime and operational costs. HELI’s manufacturing philosophy focuses on dimensional precision, wear synchronization, and enhanced durability to extend the total lifecycle of the undercarriage system.

• Target OEM Part Numbers: HYUNDAI 81EM10013, 81EM10012, 81EMDA0010.
• Compatible Machine Models: HYUNDAI R210, R225, HX220, HX225 Crawler Excavators.
• Primary Function: To provide precise and robust engagement with the track chain for efficient power transmission and propulsion.
• Key Design Focus: Achieving optimal balance between tooth hardness for abrasion resistance and core toughness to withstand shock loads and prevent tooth breakage.

Engineering & Manufacturing Process

Our production process integrates advanced metallurgy, precision machining, and controlled heat treatment to ensure each sprocket meets rigorous performance standards.

1. Material Selection & Initial Forging:

• We utilize high-carbon alloy steel (e.g., 45Mn2 or equivalent) known for its excellent hardenability and strength-to-toughness ratio.
• The process begins with precision die forging of the sprocket blank. This forging aligns the metal’s grain flow with the contour of the teeth, significantly enhancing impact strength and fatigue resistance compared to machined-from-plate alternatives.

2. CNC Machining & Profile Optimization:

• The forged blanks are processed through Computer Numerical Control (CNC) lathes and milling centers to achieve critical dimensions.
• Tooth Profile Machining: Using specialized gear hobbing or CNC milling, the sprocket teeth are cut to the exact OEM-specified pitch, pressure angle, and root profile. Our process emphasizes a smooth, precise involute form to ensure seamless chain engagement and reduced stress concentration.
• Bore & Hub Finishing: The mounting bore and pilot surfaces are finish-machined to strict tolerances (IT7-IT8 grade) to guarantee perfect concentricity with the final drive shaft, preventing vibration and premature seal failure.

3. Controlled Heat Treatment for Durability:

• Components undergo a quenching and tempering process.
• Induction Hardening or Through-Hardening: The sprocket teeth are selectively or fully hardened to achieve a surface hardness of 50-55 HRC, providing superior resistance to the abrasive wear caused by track chain interaction.
• Tempering: Following hardening, a controlled tempering cycle reduces internal stresses, enhances toughness, and prevents brittleness, ensuring the component can handle dynamic operational shocks.

4. Quality Assurance & Inspection:

• Dimensional Verification: Each sprocket is inspected using calipers, micrometers, and profile projectors to confirm conformity to all specified dimensions and tooth geometry.
• Hardness Testing: Rockwell hardness tests are performed on multiple teeth to verify consistent hardening results.
• Surface Finish Inspection: Critical sealing and mounting surfaces are checked for smoothness and absence of machining defects.

Value Proposition & Compatibility

• Direct Interchangeability: Our sprockets are engineered to match the exact dimensions and specifications of the referenced HYUNDAI part numbers, ensuring a hassle-free replacement process.
• Extended Service Life: The combination of quality alloy steel, precision forging, and controlled heat treatment results in a product that offers wear life comparable to or exceeding that of the original component.
• Cost-Effective Solution: As a direct manufacturer, HELI (CQCTRACK) provides a reliable, high-quality alternative that delivers excellent value without compromising on performance, helping to reduce the total cost of ownership for fleet managers.
• System-Wide Compatibility: Designed to work in harmony with HYUNDAI R210/R225/HX220/HX225 undercarriage systems, promoting even wear and protecting other costly components like track chains and bottom rollers.

HYUNDAI, R210, R225, HX220, HX225, and part numbers 81EM10013, 81EM10012, 81EMDA0010 are trademarks of Hyundai Heavy Industries Co., Ltd. HELI (CQCTRACK) is an independent manufacturer of replacement undercarriage components. Our products are engineered to be mechanically interchangeable with the mentioned OEM parts and are not affiliated with, sponsored by, or authorized by Hyundai Heavy Industries.