23B1512420 , 23B-15-12420 GEAR KOMATSU

Overview

The 23B-15-12420 GEAR KOMATSU is a high-precision transmission component designed to operate within Komatsu’s heavy-duty grader and loader drive systems. Built to sustain extreme torque and rotational load, this gear provides the critical link between the transmission shaft and planetary carrier assembly, ensuring smooth, reliable motion under every operating condition.

Manufactured to OEM-level standards by 3GEN Export, the 23B1512420 GEAR KOMATSU offers exceptional balance, machining accuracy, and thermal treatment consistency. Its geometry and surface profile are engineered for optimized tooth contact and low friction, directly contributing to higher machine productivity and longevity.

Advanced Engineering for Heavy Machinery

The 23B-15-12420 GEAR KOMATSU represents decades of Komatsu drivetrain innovation condensed into one precision component. It is machined from a single forged billet of high-tensile alloy steel, then carburized and tempered to achieve maximum hardness and structural integrity. Each gear tooth is ground with sub-micron precision to deliver vibration-free engagement, even when subjected to continuous heavy loads.

Key Design Characteristics

• Material: High-tensile chromium-molybdenum steel (42CrMo-class alloy).

• Manufacturing Process: Forged blank → CNC rough machining → precision gear hobbing → grinding → carburizing + tempering.

• Surface Hardness: 58 – 62 HRC.

• Core Toughness: ≥ 33 HRC to prevent brittle fracture.

• Tooth Accuracy: DIN 3962 Grade 5 / AGMA Class 10.

• Weight: ≈ 0.22 kg.

These parameters allow the 23B1512420 GEAR KOMATSU to operate efficiently in severe working environments such as quarries, mining pits, and construction sites.

Functional Role in the Komatsu Powertrain

This gear functions as an intermediate drive gear within Komatsu’s transmission and final-drive assemblies. It transfers torque between the carrier gear set and adjoining shafts, converting engine power into usable mechanical motion.

Primary Functions

1. Torque Transmission: The gear ensures constant power transfer from the engine through the planetary stages, enabling consistent wheel speed and ground traction.

2. Load Distribution: The tooth design enables multiple teeth to share the load simultaneously, minimizing stress concentration.

3. Vibration Damping: Ground tooth flanks and precise pitch reduce gear whine, enhancing operator comfort.

4. Durability Enhancement: Through-hardened material prevents wear even after thousands of duty cycles.

Together, these features ensure Komatsu machinery delivers consistent performance with reduced downtime.

Compatibility

The 23B-15-12420 GEAR KOMATSU is used in several Komatsu grader and construction equipment models. It is fully compatible with the following series:

• Komatsu GD655-3

• Komatsu GD675-5

• Komatsu GD705A-4

• Komatsu GD825A-2 / GD825-3

• Komatsu GD705-5

• Komatsu GD661 Series

This gear integrates seamlessly with other Komatsu drivetrain components such as carriers (23B-15-12311 / 23B-15-12320) and planetary ring gears (23B-15-12330). Installation requires no modification when replacing the original unit.

Technical Specifications

Manufacturing Excellence

1. Forging and Heat Treatment

Each gear blank is hot-forged to eliminate porosity and align the metal grain flow along the gear teeth. After machining, the gear undergoes carburizing to infuse carbon into the surface layer, followed by oil quenching and tempering to ensure the proper hardness-to-toughness ratio.

2. CNC Machining

All critical surfaces, bore, hub faces, and tooth profiles, are finished on high-precision CNC gear grinders. Dimensional tolerances remain within microns to guarantee perfect alignment with mating gears.

3. Quality Inspection

• Runout Test: < 0.02 mm.

• Tooth Contact Pattern: > 90 % contact area.

• Hardness Verification: Uniformity ± 1 HRC across surface.

• Balancing Check: Zero vibration at rated RPM.

These measures ensure the 23B-15-12420 GEAR KOMATSU meets strict performance standards before shipment.

Mechanical Benefits

Exceptional Strength

The carburized surface resists wear while the tough core absorbs shock loads. This dual-property construction prevents fatigue cracks even in severe working cycles.

High Precision Engagement

The straight-cut teeth provide a positive, backlash-controlled mesh. Operators experience smoother acceleration, stable torque delivery, and reduced vibration.

Extended Service Life

With correct lubrication, the 23B1512420 GEAR KOMATSU can exceed 15 000 operating hours without measurable wear, significantly reducing maintenance downtime.

Enhanced Fuel Efficiency

By minimizing internal friction losses, the gear enables the drivetrain to operate more efficiently, which can improve overall fuel economy by 2–3 %.

Installation and Maintenance

Installation Steps

1. Preparation: Inspect all adjoining gears, carriers, and bearings for signs of wear.

2. Positioning: Align the gear bore precisely with the carrier shaft.

3. Fastening: Apply specified Komatsu torque on retaining bolts / lock rings.

4. Lubrication: Use SAE 80W-90 gear oil or equivalent per OEM recommendations.

5. Testing: Run the machine at low speed for 10 minutes to verify noise-free operation.

Maintenance Guidelines

• Replace gear oil every 1000 hours of operation.

• Inspect tooth surfaces for pitting or burnishing.

• Re-torque fasteners during scheduled overhauls.

• Keep oil seals intact to avoid contamination.

Adhering to these practices maximizes gear longevity and machine availability.

Industrial Applications

This gear is employed across multiple heavy-machinery sectors:

• Road construction: Supports smooth grading operations and level control.

• Mining: Withstands repeated load reversals under harsh conditions.

• Infrastructure projects: Ensures precise torque delivery on uneven terrains.

• Agricultural and logging equipment: Provides steady traction and stability.

Its compact yet robust design allows reliable performance across varied Komatsu applications.

Performance Testing

Before shipping, every 23B-15-12420 GEAR KOMATSU undergoes a battery of performance tests in 3GEN Export’s certified facility:

• Dynamic Load Endurance Test: Simulated torque of up to 150 % of rated capacity.

• Thermal Stability Test: Continuous operation at 120 °C ambient for 48 hours.

• Lubrication Compatibility Check: Tested with mineral and synthetic oils.

• Noise Analysis: Sound level ≤ 70 dB at rated speed.

Only gears that pass these rigorous standards receive the 3GEN Export mark of approval.

Advantages of 23B-15-12420 GEAR KOMATSU

• Unmatched precision: CNC-ground teeth for flawless fit.

• High load capacity: Forged steel construction handles extreme torque.

• Wear resistance: Deep case hardening extends service life.

• Easy installation: Exact OEM fitment without modifications.

• Global availability: Delivered anywhere within 5 working days.

Packaging and Delivery

Each gear is individually sealed in corrosion-resistant film and packed in foam-reinforced cartons. 3GEN Export partners with DHL, UPS, and FedEx for expedited shipping to over 100 countries. Typical delivery time is five working days worldwide.

OEM Supplier Assurance

3GEN Export supplies OEM-standard spare parts for brands such as Komatsu, Caterpillar, Volvo, and Hitachi. All components are manufactured under ISO 9001 quality systems and backed by a 12-month manufacturer warranty covering workmanship and material defects.

When you source the 23B-15-12420 GEAR KOMATSU from 3GEN Export, you gain the assurance of precision engineering and global support.

Global Support Network

• Customer service: 24 / 7 technical assistance.

• Inventory: Thousands of Komatsu part numbers ready for immediate dispatch.

• After-sales service: Installation guidance and performance monitoring.

3GEN Export maintains regional warehouses and partnerships across Europe, the Middle East, and South America to guarantee fast supply for mission-critical projects.

Why 3GEN Export is Your Reliable Partner

• OEM standard manufacturing with zero compromise on accuracy.

• Express delivery to all continents within 5 business days.

• Secure payment systems and transparent order tracking.

• Dedicated technical advisors for model-specific compatibility checks.

3GEN Export stands as a trusted name for contractors, dealers, and maintenance teams who value quality and speed.

Conclusion

The 23B-15-12420 GEAR KOMATSU is an indispensable drivetrain component engineered for strength, balance, and long-term performance. Its premium alloy construction and precision manufacturing guarantee stability and power transmission across Komatsu’s most demanding grader models.

Backed by 3GEN Export, this gear is not just a replacement part, it is a performance investment. With OEM-grade engineering and global delivery within five days, it ensures your Komatsu fleet remains productive with minimal downtime.

Manufactured in Turkey, these products are made using the latest technologies and built to meet the highest international standards. Each machine is a high-quality copy of the original, ensuring durability, precision, and performance that you can rely on for modern construction and metalworking projects.