Product Introduction

The Half Shaft Gear 199012320009 is a key internal bevel gear within the differential unit, specifically engineered to mesh with differential pinion gears and transfer torque directly to the drive half shafts. It is produced from high-strength alloy steel with precise forging, carburizing and grinding processes to ensure high surface hardness, excellent wear resistance and stable meshing performance. The internal spline structure is precisely machined for a tight, reliable connection to the half shaft, ensuring no slippage under heavy torque conditions. This gear is strictly manufactured to original equipment standards, providing perfect fitment and consistent performance for heavy-duty commercial vehicle applications.

Core Function

• Transmits torque from differential pinion gears to the drive half shafts for wheel drive.

• Works with differential pinion gears to realize differential speed between left and right wheels during steering.

• Ensures stable torque transmission under heavy load and harsh working conditions.

• Direct replacement part matching original specifications for reliable differential operation.

Half Shaft Gear 199012320009 Sinotruk – Factory-Direct OEM Replacement

When your Sinotruk heavy-duty truck demands reliable power transfer from the differential to the drive wheels, every tooth on the half shaft gear matters. The Half Shaft Gear 199012320009 is precision-engineered to match Sinotruk OEM specifications, ensuring smooth torque distribution and extended service life under the toughest operating conditions. Sourced directly from our factory in China, this gear delivers the quality your fleet needs — without the inflated middleman pricing.

At Mettlead, we specialize in supplying genuine-equivalent parts for SINOTRUK, HOWO, SITRAK, SHACMAN, FAW, WEICHAI, DONGFENG, and FOTON heavy trucks. Whether you are maintaining a single vehicle or managing a large fleet, this half shaft gear keeps your rear axle differential performing at peak efficiency.

Key Features and Benefits of Half Shaft Gear 199012320009

This Sinotruk half shaft gear is more than just a replacement component — it is a performance guarantee for your drivetrain. Here is what sets it apart:

• OEM-Grade Precision: Manufactured to match the original part number 199012320009, so it fits perfectly into your Sinotruk rear axle assembly without modification.
• High-Strength Alloy Steel: Forged and heat-treated to withstand heavy torque loads, resisting wear and fatigue even under continuous heavy-haul operations.
• Optimized Tooth Profile: The gear teeth are ground to tight tolerances, promoting quiet meshing, reduced vibration, and efficient power transmission through the differential mechanism.
• Extended Service Life: Surface hardening treatment ensures the gear maintains its integrity over hundreds of thousands of kilometers, reducing unplanned downtime.
• Factory-Direct Pricing: By sourcing directly from Mettlead, you eliminate unnecessary markups and enjoy competitive wholesale pricing on every order.
• Fast Global Shipping: Our streamlined logistics network ensures your half shaft gear reaches you quickly, minimizing vehicle downtime.

Application Scenario: Where Does This Half Shaft Gear Work?

The Half Shaft Gear 199012320009 is specifically designed for Sinotruk heavy-duty vehicles, including HOWO and SITRAK series trucks. Installed within the rear axle differential assembly, this gear plays a critical role in the differential mechanism by:

• Transmitting driving torque from the differential case to the half shafts and ultimately to the drive wheels.
• Allowing the left and right wheels to rotate at different speeds during cornering, which protects the drivetrain from excessive stress.
• Working in concert with the differential side gears and spider gears to balance power distribution under varying load conditions.

In short, without a properly functioning half shaft gear, your truck’s rear axle cannot deliver smooth, balanced power to the road — making this component essential for safe and efficient operation.

Looking for more rear axle components? Browse our complete Rear Axle Parts catalog for differential gears, bearings, seals, and more.

Technical Specifications

Need the full Sinotruk parts catalog? Visit our Sinotruk Truck Parts page for a comprehensive listing.

OEM and ODM Capabilities

Mettlead understands that different markets have different requirements. That is why we offer flexible OEM and ODM services tailored to your business needs:

• White-Label Packaging: We can ship the Half Shaft Gear 199012320009 in neutral packaging or under your own brand label, helping you build your brand identity in your local market.
• Custom Packaging Solutions: From individual retail boxes to bulk export cartons, we adapt our packaging to suit your distribution model.
• Strict Quality Control: Every half shaft gear undergoes dimensional inspection, hardness testing, and surface quality checks before leaving our facility. We maintain full traceability from raw material to finished product.
• Bulk Order Support: Whether you need 10 pieces or 10,000, our production capacity scales to meet your demand with consistent lead times.
• Factory Visits Welcome: We encourage prospective partners to visit our facility in China to inspect our production lines, quality systems, and inventory firsthand.

Explore our full range of Sinotruk and HOWO replacement parts on the Sinotruk & HOWO Truck Parts brand page.

Frequently Asked Questions About Half Shaft Gear 199012320009

What is the function of a half shaft gear in a Sinotruk rear axle?

The half shaft gear sits inside the differential housing and meshes with the spider (planet) gears. Its primary job is to transfer rotational torque from the differential assembly to the half shaft, which then drives the wheel. Additionally, it allows the left and right wheels to spin at different speeds when the vehicle turns, preventing drivetrain binding and tire wear.

How do I confirm that part number 199012320009 fits my truck?

This half shaft gear is designed for Sinotruk heavy-duty vehicles, including HOWO and SITRAK models equipped with the corresponding rear axle assembly. To confirm fitment, cross-reference the OEM part number 199012320009 with your vehicle’s parts manual or provide us with your VIN — our team will verify compatibility for you.

What material is this half shaft gear made from?

It is manufactured from high-strength alloy steel that undergoes carburizing and heat treatment. This process creates a hard, wear-resistant surface while maintaining a tough core, which is essential for handling the high torque loads present in heavy truck differentials.

How can I tell when a half shaft gear needs replacement?

Common signs of a worn or damaged half shaft gear include unusual clunking or clicking noises from the rear axle during acceleration or cornering, excessive backlash in the drivetrain, and visible pitting or chipping on the gear teeth during inspection. If you notice any of these symptoms, prompt replacement prevents further damage to the differential assembly.

Does Mettlead offer other differential components that work with this gear?

Yes. We supply a full range of rear axle differential parts for Sinotruk vehicles, including spider gears, thrust washers, differential cases, ring and pinion sets, and bearings. Ordering related components together ensures matched wear characteristics and optimal performance.

What is the typical lead time for this half shaft gear?

For standard orders, most items ship within 3–7 business days. Large-volume orders may require slightly longer production time. We recommend contacting our sales team for a precise delivery estimate based on your quantity and destination.

Ready to Order Your Half Shaft Gear 199012320009?

Getting the right Sinotruk half shaft gear at the right price should not be complicated. At Mettlead, we make it simple: factory-direct quality, transparent pricing, and responsive support from a team that knows heavy truck parts inside and out.

Take the next step today:

• Request a competitive quote for Half Shaft Gear 199012320009
• Ask about volume discounts for fleet operators and distributors
• Inquire about custom packaging or white-label options

Contact Us Now to get your personalized quotation and lead time. Our team typically responds within 24 hours — because we know that when your trucks are waiting, every hour counts.