Core Features
Speed Reduction and Torque Increase & Power Transmission: The internal gear ring meshes with the planetary gears, achieving a precise transmission ratio (error ≤0.2%). The rated torque transmitted per tooth is ≥3800 N·m, enabling power reduction and torque increase to meet the speed and traction requirements of graders.
Heavy-Duty Bearing and Impact Reduction: The integral forged structure can withstand instantaneous impacts of 2.5 times the rated load. Tooth surface contact stress is ≤1200 MPa, vibration amplitude is attenuated by ≥40%, and transmission noise is reduced by ≤82 dB, protecting the planetary gears and bearings.
Precise Meshing and Stable Positioning: The gear ring's inner diameter tolerance is H7, radial runout is ≤0.02 mm, tooth profile accuracy is GB/T 10095.1 Grade 7, and tooth flank clearance is stable at 0.18–0.25 mm, ensuring stable meshing with the planetary gears.
Forced Lubrication and Heat Dissipation: The tooth root features an annular lubrication groove, working in conjunction with a pressure lubrication system. Operating temperature is ≤85℃, suitable for a wide temperature range of -40℃ to +85℃, preventing tooth surface scuffing and wear.
Steering Coordination and Differential Adaptation: Adapts to the differential speed requirements of graders during steering, working in conjunction with the planetary carrier to compensate for the speed difference between the left and right wheels, ensuring smooth steering and improving operational accuracy.
Application Scenarios and Usage Recommendations
Application scenario: Designed for Komatsu GD series graders' rear axle and planetary gearboxes, this system handles heavy-duty, high-turning conditions in mining, infrastructure, and road maintenance, delivering core functions of speed reduction, torque enhancement, and steering coordination.
Usage tips
Before installation, clean the tooth surfaces and inner diameter, checking for cracks, dents, and burrs. Tighten the bolts evenly (torque according to original manufacturer specifications) to avoid uneven loads that could damage the tooth surfaces.
Check the rear axle oil level and quality every 1500 hours. When changing the oil, simultaneously check the tooth surface wear and meshing clearance; replace the oil immediately if any abnormalities are found.
Avoid prolonged overload operation to prevent tooth surface fatigue spalling and gear ring deformation, thus extending the overall lifespan of the transmission system.
Summarize
The 23B-15-12620 internal gear ring, featuring factory-grade compatibility, high fatigue resistance, excellent wear and pitting resistance, and low friction with high efficiency, provides stable torque reduction and steering coordination for Komatsu GD series graders. Designed for harsh working conditions, it enhances operational precision and equipment availability, making it a key transmission component for reducing O&M costs.
