Product Introduction

• Structure: A precision closed-die forging from 20CrMnTi alloy steel, featuring an external involute tooth profile (28 teeth) and a keyed inner bore with an integrated needle roller bearing. The gear teeth undergo full carburizing, quenching, and precision grinding, achieving surface hardness HRC 58–62(anti-pitting/wear) and core hardness HRC 33–45 (anti-impact fracture). The needle bearing enables low-friction rotation relative to the shaft, while the keyway ensures torque transfer without slippage.

• Performance: The carburized tooth surface resists pitting and wear during long-term medium-speed cruising, maintaining smooth meshing with the countershaft gear for over 60,000 hours of operation. The integrated needle bearing reduces friction between the gear and shaft, improving transmission efficiency and reducing heat generation. The keyed inner bore ensures a rigid, non-slip connection to the right output shaft, preventing slippage under medium torque loads.

Core Function

1. 3rd gear power transmission: Meshes with the countershaft 3rd gear to transmit torque from the countershaft to the right output shaft, supporting medium-speed cruising.

2. Low-friction rotation: The integrated needle bearing enables low-resistance rotation of the gear relative to the shaft, improving transmission efficiency.

3. Fixed shaft engagement: The keyed inner bore locks the gear to the right output shaft, ensuring torque is transferred without slippage.

Output Shaft 3rd Gear AZ2210030224 – SINOTRUK HW Series Gearbox

When your SINOTRUK HW series gearbox demands a reliable third-gear replacement, the Output Shaft 3rd Gear AZ2210030224 delivers the precision-engineered performance that keeps heavy-duty trucks moving. Built to meet OEM specifications, this gear ensures smooth torque transmission, reduced noise, and extended service life — even under the most punishing operating conditions. At Mettlead, we supply this genuine-spec gearbox component directly from our factory in China, giving procurement managers worldwide unbeatable pricing without compromising on quality.

Why Choose the Output Shaft 3rd Gear AZ2210030224 for Your SINOTRUK HW Gearbox

The third gear on the output shaft plays a critical role in your transmission system. It handles the intermediate torque load during acceleration and hill-climbing, meaning any compromise in material hardness or tooth geometry leads to premature wear, excessive noise, or even catastrophic gearbox failure. That’s exactly why this component is manufactured with such care.

Key Features and Benefits

• OEM-Grade Precision: Tooth profile, module, and bore dimensions match the original AZ2210030224 specification, ensuring seamless fitment in SINOTRUK HW series gearboxes.
• High-Strength Alloy Steel: Forged from premium carburized alloy steel, then heat-treated to achieve a surface hardness of HRC 58–62 for outstanding wear resistance.
• Optimized Tooth Geometry: Helical gear design minimizes engagement shock, reduces operating noise, and distributes load evenly across the tooth face.
• Extended Service Life: Precision grinding and surface finishing reduce friction, helping the gear last longer between rebuilds.
• Direct Factory Pricing: By sourcing from Mettlead, you eliminate middlemen and gain access to competitive wholesale rates ideal for fleet operators and distributors.
• Strict Quality Control: Every batch undergoes dimensional inspection, hardness testing, and magnetic particle inspection before shipping.

Technical Specifications – Output Shaft 3rd Gear AZ2210030224

Application Scenarios – Compatible Vehicles and Gearbox Models

The Output Shaft 3rd Gear AZ2210030224 is specifically designed to fit the SINOTRUK HW series heavy-duty manual transmissions. These gearboxes are widely installed across multiple SINOTRUK vehicle platforms, making this gear a high-demand replacement part for fleets operating in construction, mining, long-haul logistics, and heavy transport.

Compatible Gearbox Models

• HW19710 Transmission
• HW15710 Transmission
• HW19712 Transmission
• HW20716 Transmission
• Other HW series variants using the AZ2210030224 output shaft gear

Compatible Vehicle Platforms

• SINOTRUK HOWO A7 Tractor Trucks
• SINOTRUK HOWO 6×4 / 8×4 Dump Trucks
• SINOTRUK SITRAK C7H Heavy-Duty Trucks
• SINOTRUK HOWO T7H Logistics Vehicles

Whether you’re rebuilding a gearbox in the workshop or stocking parts for an entire fleet, this output shaft 3rd gear serves as a direct drop-in replacement that restores factory-level shifting performance. For more gearbox parts and SINOTRUK HOWO gearbox components, explore our full catalog.

OEM/ODM Capability and Custom Packaging

At Mettlead, we understand that B2B buyers have diverse branding and packaging needs. That’s why we offer flexible customization options alongside our standard supply:

• White-Label Supply: Receive parts in unbranded neutral packaging, ready for your own labeling and distribution.
• Custom Packaging: We print your brand name, logo, part number, and barcode on individual boxes, matching your corporate identity exactly.
• Bulk and Kit Packaging: Order individual gears or complete gearbox overhaul kits — we adapt to your inventory model.
• Quality Documentation: We provide inspection reports, material certificates, and dimensional test data upon request.

This flexibility makes us a trusted partner for distributors, trading companies, and fleet maintenance operators who need consistent supply under their own brand. Browse our full range of SINOTRUK HOWO truck parts to see what else we can source for your business.

Customer Case Study – Output Shaft 3rd Gear AZ2210030224

In early 2024, a fleet maintenance company based in East Africa reached out to Mettlead looking for a reliable supplier of Output Shaft 3rd Gear AZ2210030224 for their SINOTRUK HW series gearbox overhaul program. They operated over 120 HOWO dump trucks in mining logistics and were experiencing frequent third-gear failures due to harsh terrain and heavy payloads.

After receiving samples and conducting fitment tests, the client confirmed that our AZ2210030224 output shaft 3rd gear matched OEM dimensions perfectly and delivered comparable hardness values. They proceeded with an initial bulk order of 200 pieces. Over the following six months, their gearbox rebuild failure rate dropped by 35%, and the average time between overhauls extended significantly.

Today, this client orders quarterly and has expanded their procurement to include additional SINOTRUK HW gearbox components from our catalog. Their feedback confirmed what we already knew: factory-direct sourcing combined with strict quality control creates real value for heavy-truck operators working in demanding environments.

Frequently Asked Questions – Output Shaft 3rd Gear AZ2210030224

What gearbox models does the AZ2210030224 output shaft 3rd gear fit?

This gear is engineered specifically for the SINOTRUK HW series gearbox family, including models HW19710, HW15710, HW19712, and HW20716. It serves as a direct replacement for the original third-gear component on the output shaft, so installation requires no modifications.

What material is used in manufacturing this output shaft 3rd gear?

The AZ2210030224 output shaft 3rd gear is forged from 20CrMnTi carburized alloy steel. After carburizing, quenching, and tempering, the gear surface reaches HRC 58–62, while the core retains HRC 30–45 for toughness. This combination provides excellent wear resistance and impact strength under heavy loads.

How can I verify the gear’s authenticity and quality before placing a bulk order?

We encourage buyers to request samples first. Every sample comes with a dimensional inspection report and hardness test results. Additionally, you can compare the tooth count, module, bore diameter, and overall width against your OEM drawing to confirm compatibility. Mettlead also welcomes factory visits for quality audits.

What causes premature failure of the 3rd gear on the HW gearbox output shaft?

Common causes include insufficient lubrication, misalignment during assembly, overloading beyond rated torque, and using low-quality replacement parts with inadequate heat treatment. Selecting a gear that meets OEM hardness and dimensional specifications — like the AZ2210030224 from Mettlead — significantly reduces the risk of premature tooth wear or breakage.

Can I order custom-branded packaging for the AZ2210030224 gear?

Absolutely. We offer white-label and custom packaging options where your brand, logo, and part number appear on individual boxes. This service is available at no extra charge for qualifying order quantities. Simply share your artwork and requirements, and our team handles the rest.

What is the typical lead time for bulk orders of this output shaft gear?

Standard lead time ranges from 7 to 15 working days depending on order quantity and current stock levels. High-demand parts like the AZ2210030224 are frequently kept in ready stock, which can reduce lead time to as few as 3–5 days for smaller quantities.

Get Your Competitive Quote Today

Ready to secure factory-direct pricing on the Output Shaft 3rd Gear AZ2210030224 for your SINOTRUK HW series gearbox? Whether you need 10 pieces or 10,000, Mettlead delivers quality-controlled parts with flexible payment terms, fast shipping, and responsive support from our dedicated export team.

Don’t let gearbox downtime eat into your margins. Contact us now to request a quote, ask for samples, or schedule a factory visit. Our team typically responds within 12 hours with pricing and availability.