Product Introduction

The Planetary Gear 199012320010 is a critical precision bevel gear component for heavy-duty truck differentials, crafted from premium high-strength alloy steel via precision forging and full-process heat treatment. Its integral bevel tooth profile is precision-machined to strict OE tolerances, ensuring seamless meshing with the matching side gears (e.g., 199012320009). The gear features a central precision-bored hole for the differential cross shaft, with a smooth inner bore surface to minimize rotational friction and wear during operation. Carburizing and quenching treatment delivers a hardened tooth surface (HRC 58-62) and tough core, enabling it to withstand extreme torque impacts and continuous heavy-load operation. Its compact, robust structural design is optimized for the confined space of the differential case, ensuring reliable performance in harsh working conditions such as off-road transportation and heavy-haul logistics.

Core Function

• Acts as the core power distribution component in the differential, meshing with side gears to transfer torque from the crown wheel to the left and right half shafts.

• Enables smooth differential rotation between the left and right drive wheels, preventing tire skidding and wear during vehicle cornering or on uneven road surfaces.

• Withstands high instantaneous torque loads and cyclic mechanical stresses, ensuring the structural integrity of the differential transmission system.

• Maintains precise tooth meshing clearance with mating components, reducing operational noise and vibration while improving the overall efficiency of the drivetrain.

• Serves as a direct OE replacement part, matching the original size and performance parameters to ensure perfect compatibility with the differential assembly.

Planetary Gear 199012320010 – Genuine Sinotruk Replacement for Heavy-Duty Trucks

When your heavy-duty truck demands reliable power transmission, the Planetary Gear 199012320010 Sinotruk delivers exactly that. Engineered to handle extreme torque loads and continuous operation, this planetary gear sits at the heart of the rear axle reduction system — quietly transferring power while extending drivetrain life. Whether you’re maintaining a fleet or sourcing parts for resale, Mettlead supplies this critical component directly from China’s trusted manufacturing base, so you get OEM-equivalent quality without the inflated middleman pricing.

As a dedicated supplier of Sinotruk HOWO truck parts, we understand that every gear tooth matters. That’s why our Planetary Gear 199012320010 undergoes strict quality control before it ever leaves our facility.

Key Features and Benefits of Planetary Gear 199012320010 Sinotruk

This isn’t just another aftermarket gear — it’s a precision-manufactured component built to meet the demanding standards of Sinotruk heavy vehicles. Here’s what sets it apart:

• OEM-Grade Compatibility: Directly interchangeable with part number 199012320010, ensuring a seamless fit within the Sinotruk rear axle assembly.
• High-Strength Alloy Steel: Forged from premium alloy steel, then heat-treated to achieve exceptional surface hardness and core toughness — meaning longer service life under heavy loads.
• Precision Tooth Profile: CNC-machined gear teeth ensure smooth meshing, reduced noise, and efficient power transmission throughout the planetary gear set.
• Superior Wear Resistance: Carburized and quenched surface treatment minimizes abrasion, even during prolonged high-torque operation.
• Factory-Direct Pricing: By sourcing directly from Mettlead, you eliminate unnecessary supply chain markups while still receiving professionally inspected, quality-assured parts.
• Fast and Reliable Delivery: We maintain consistent stock levels so your downtime stays minimal and your fleet keeps moving.

In other words, this planetary gear works harder so your trucks don’t have to stop. Moreover, our flexible payment methods and transparent communication make the procurement process straightforward from start to finish.

Technical Specifications

Below you’ll find the detailed parameters for the Planetary Gear 199012320010 Sinotruk. These specifications help ensure you’re ordering the correct component for your specific vehicle configuration:

For a complete selection of rear axle components, feel free to browse our rear axle parts category page.

Application Scenarios

The Planetary Gear 199012320010 plays a vital role within the wheel-end planetary reduction system of Sinotruk heavy-duty vehicles. Specifically, it participates in the following real-world scenarios:

• Applicable Vehicles: Sinotruk HOWO, SITRAK, and related heavy truck models equipped with planetary hub reduction rear axles.
• Functional Role: As a core element of the planetary gear set, it engages with the sun gear and ring gear to achieve speed reduction and torque multiplication at the wheel hub.
• Operating Conditions: Designed to perform under heavy payloads, steep gradients, and continuous long-haul operations — exactly the conditions Chinese heavy trucks face in mining, construction, and logistics applications.
• Power Transmission: Converts high-speed, low-torque input from the differential into low-speed, high-torque output at the wheel — enabling controlled, powerful movement even at full load.

In short, without a properly functioning planetary gear, the entire rear axle reduction system loses efficiency. That’s why choosing the right OEM-grade replacement matters. Explore our full Sinotruk truck parts catalog to find matching components for your fleet.

OEM/ODM Capability

At Mettlead, we go beyond simple part supply. As a factory-direct partner, we offer flexible customization services tailored to wholesale buyers and fleet operators worldwide:

• White-Label Packaging: Need to sell under your own brand? We provide neutral or custom-branded packaging that aligns with your business identity.
• Custom Packaging Solutions: From individual box labeling to pallet-level markings, we accommodate your specific logistics and warehousing requirements.
• Strict Quality Control: Every Planetary Gear 199012320010 Sinotruk passes through dimensional inspection, hardness verification, and visual inspection before shipment. Consequently, defect rates remain extremely low.
• Bulk Order Support: Whether you need 50 pieces or 5,000, our production capacity scales to match your demand without sacrificing lead time.
• Factory Visit Welcome: We encourage prospective partners to visit our facility in China, inspect our production lines firsthand, and build confidence in our capabilities.

Furthermore, because we specialize in Chinese brand truck parts — including SINOTRUK, SHACMAN, FAW, WEICHAI, DONGFENG, and FOTON — you can consolidate multiple part orders with one reliable supplier.

Frequently Asked Questions (FAQ)

What is the function of Planetary Gear 199012320010 in a Sinotruk truck?

The Planetary Gear 199012320010 is a critical component within the wheel-end planetary reduction assembly. It meshes with the sun gear and ring gear to reduce rotational speed while multiplying torque — ultimately allowing the heavy truck to move heavy loads smoothly and efficiently.

How do I confirm that Planetary Gear 199012320010 fits my truck model?

First, verify that your vehicle uses a Sinotruk planetary hub reduction rear axle. Then, cross-reference the OEM part number 199012320010 with your vehicle’s parts catalog. If you’re uncertain, simply contact us with your VIN or axle model, and our team will confirm compatibility within 24 hours.

What material is this planetary gear made from?

It’s manufactured from high-grade alloy steel, which is then carburized and quenched to achieve a surface hardness of HRC 58–63. This treatment creates a hard, wear-resistant exterior while maintaining a tough, shock-absorbing core — ideal for the constant cyclic loading a planetary gear endures.

How long does the Planetary Gear 199012320010 Sinotruk typically last?

Under normal operating conditions with proper lubrication and maintenance, this gear is designed to match or exceed OEM service life. However, actual longevity depends on load conditions, driving habits, and axle oil maintenance schedules. Regular inspections help catch early wear signs before they become costly failures.

Can I order a small sample quantity before placing a bulk order?

Absolutely. We understand that verifying quality firsthand is important for procurement decisions. We support sample orders so you can inspect fit, finish, and material quality before committing to larger volumes.

Does this planetary gear come with any surface defect protection during shipping?

Yes. Each gear is individually wrapped with anti-rust oil coating and protective packaging to prevent surface damage, corrosion, or tooth deformation during transit. Additionally, we use reinforced outer cartons for added security.

Ready to Source Your Planetary Gear 199012320010 Sinotruk?

Stop overpaying for middleman markups. With Mettlead, you get factory-direct access to genuine-quality Sinotruk planetary gears — backed by strict quality control, fast shipping, and a team that speaks your language.

Whether you need a single replacement or a container-load of rear axle parts, we’re ready to provide competitive pricing and reliable delivery timelines tailored to your project.

Take the next step: Contact us now to request a quotation, confirm part compatibility, or discuss custom packaging options. Our team typically responds within 12–24 hours.

Browse more components: Sinotruk HOWO Parts | Rear Axle Parts | All Sinotruk Truck Parts