Product Introduction

• Structure: A precision monoblock forging from 40CrNiMo alloy steel, integrating a full-length splined shaft and a mounting flange. The splined section features 54 external involute splines (φ110mm) for engagement with the differential, while the flange has 4 bolt holes for drive shaft connection. The entire component undergoes carburizing, quenching, and precision grinding, achieving surface hardness HRC 55–60(anti-wear) and core hardness HRC 35–40 (high impact toughness). The rear end has a threaded bore for locking the shaft nut.

• Performance: The monoblock forging eliminates assembly gaps, ensuring exceptional torsional rigidity for ultra-heavy load transmission. The carburized spline surface resists wear from differential rotation, maintaining a secure connection for over 80,000 hours of operation.

Core Function

1. Ultra-heavy load power output: Transmits torque from the transmission differential to the drive shaft, supporting the highest load capacity of the HW25712 transmission.

2. Differential engagement: The splined shaft engages with the differential side gear, transferring power from the transmission to the driveline.

3. Drive shaft connection: The integral flange provides a rigid mounting point for the drive shaft, ensuring concentric alignment and reducing vibration.

Output Shaft AZ2225100001 – SINOTRUK HW Series Gearbox | Factory Direct Supply

When your SINOTRUK HW series gearbox demands a reliable replacement output shaft, precision engineering isn’t optional — it’s essential. The Output Shaft AZ2225100001 is purpose-built to restore full torque transmission in HW series gearboxes, ensuring your heavy-duty trucks get back on the road faster and stay there longer. As a factory-direct supplier, Mettlead delivers this genuine-spec transmission component at competitive pricing, with the quality control your fleet operations depend on.

Why This SINOTRUK HW Gearbox Output Shaft Stands Out

The output shaft sits at the heart of every HW series transmission. It carries the final drive torque from the gearbox to the driveline, which means any compromise in material strength or dimensional accuracy leads to premature wear, vibration, and costly downtime. Here’s what makes the AZ2225100001 output shaft a smart procurement choice:

• OEM-Matched Dimensions: Manufactured to original SINOTRUK specifications, so installation is seamless without modifications or adapter components.
• High-Grade Alloy Steel: Heat-treated for superior fatigue resistance under continuous heavy-load conditions, extending service intervals significantly.
• Precision Spline Machining: Tight-tolerance splines ensure smooth gear engagement and minimize backlash throughout the shaft’s operational life.
• Surface Hardening Treatment: Critical bearing journals and spline surfaces undergo carburizing to resist wear and surface pitting.
• Strict Quality Control: Every shaft passes dimensional inspection, hardness testing, and surface finish verification before shipping.

In other words, this output shaft doesn’t just fit — it performs exactly as the original part did when your truck rolled off the factory line.

Technical Specifications – Output Shaft AZ2225100001

Application Scenarios – Where Does This Output Shaft Fit?

The Output Shaft AZ2225100001 is specifically designed for the SINOTRUK HW series gearbox family. This transmission platform powers some of the most widely deployed heavy-duty trucks across Africa, Southeast Asia, the Middle East, and Central Asia. Here are the primary applications:

• SINOTRUK HOWO A7 / T7H Tractor Trucks: Long-haul configurations running HW19710 or HW19712 transmissions rely on this shaft for uninterrupted torque delivery.
• SINOTRUK HOWO Dump Trucks: Mining and construction fleets subject their gearboxes to extreme cyclic loads — this output shaft handles the stress.
• SITRAK C7H Series: Premium heavy-duty trucks equipped with HW series gearboxes use the same AZ2225100001 specification.
• Concrete Mixer Trucks: Continuous PTO engagement puts extra demand on the output shaft, making material quality non-negotiable.

Whether you’re maintaining a logistics fleet or supplying a regional spare parts distribution network, this component covers a broad range of vehicle applications within the SINOTRUK HOWO truck parts ecosystem.

Looking for additional gearbox components or exploring our full SINOTRUK HOWO gearbox parts catalog? We maintain ready stock on high-demand transmission parts to keep your lead times short.

OEM/ODM Capability – Tailored to Your Market

Mettlead understands that different markets have different packaging, branding, and specification requirements. That’s why we offer flexible manufacturing and fulfillment options for the Output Shaft AZ2225100001 and our entire gearbox parts range:

• White-Label Packaging: Ship under your own brand with custom-printed boxes, labels, and documentation. This helps you build local brand equity without investing in production facilities.
• Custom Packaging Solutions: Whether you need corrosion-resistant export packaging or retail-ready display boxes, our packaging team accommodates your specifications.
• Batch Quality Reports: Every production lot can be accompanied by inspection reports covering dimensional checks, hardness testing, and material certifications — giving your customers extra confidence.
• Flexible MOQ: We work with both large-scale fleet operators and growing distributors. Our minimum order quantities adapt to your business stage.

We welcome factory visits as well — seeing our production lines and QC processes firsthand gives you peace of mind when placing bulk orders.

Customer Case Study – Fleet Operator in East Africa

A Kenyan transport company operating 45 SINOTRUK HOWO tractor trucks reached out to Mettlead after experiencing repeated output shaft failures on their HW19710 gearboxes. Their previous supplier delivered inconsistent quality, resulting in two shaft replacements within 80,000 km on several vehicles.

After switching to our Output Shaft AZ2225100001, here’s what changed:

• Average shaft service life increased beyond 200,000 km with no premature failures reported over 14 months.
• Procurement cost dropped 18% compared to their previous aftermarket source, thanks to factory-direct pricing.
• Lead time shortened from 35 days to 12 days because Mettlead keeps the AZ2225100001 in ready stock for the SINOTRUK HW series gearbox.
• The client now orders additional HW series gearbox parts — including countershafts, synchronizer assemblies, and bearing kits — consolidating their supply chain with one trusted partner.

This is exactly the kind of outcome we aim for: lower total cost of ownership, reduced truck downtime, and a simplified procurement workflow for your maintenance team.

Frequently Asked Questions – Output Shaft AZ2225100001

What gearbox models does the Output Shaft AZ2225100001 fit?

This output shaft is engineered specifically for the SINOTRUK HW series gearbox, including models HW19710, HW19712, HW15710, and HW13710. It replaces the factory-installed output shaft directly without any machining or modification.

How does material quality affect output shaft longevity in HW gearboxes?

The HW series gearbox transmits very high torque loads, particularly in dump truck and heavy tractor applications. A low-quality output shaft made from inferior steel will develop micro-cracks in the spline root area, eventually leading to catastrophic failure. Our AZ2225100001 shaft uses carburized alloy steel with a surface hardness of HRC 58–62 specifically to resist these fatigue failure modes.

Can I identify a worn output shaft before it fails completely?

Yes. Common early warning signs include increased gearbox noise at highway speeds, vibration felt through the driveline, and difficulty engaging certain gear positions. If your driver reports any of these symptoms and the gearbox oil shows metallic particles, the output shaft splines likely need inspection.

Is this output shaft sold individually or as part of a kit?

The Output Shaft AZ2225100001 is sold as an individual component. However, if you’re performing a complete gearbox overhaul, we can supply bearing kits, synchronizer rings, seals, and other mating components in a single shipment — reducing your logistics cost and consolidating your order.

What quality tests does Mettlead perform on each output shaft?

Every AZ2225100001 output shaft undergoes dimensional inspection (spline pitch, journal diameter, overall length), Rockwell hardness testing on critical surfaces, magnetic particle inspection for subsurface cracks, and visual inspection for surface defects. Shafts that don’t pass any single test are rejected — no exceptions.

Does Mettlead offer custom branding on the Output Shaft AZ2225100001?

Absolutely. We provide white-label options including laser-etched part numbers, custom packaging with your company logo, and branded documentation. This is particularly popular with regional distributors building their own aftermarket brand presence.

Ready to Secure Your Supply of Output Shaft AZ2225100001?

Every day a truck sits idle waiting for parts costs your operation real money. Mettlead keeps this SINOTRUK HW series gearbox output shaft in ready stock, which means faster fulfillment and shorter downtime for your fleet.

Here’s how to move forward:

1. Request a Quote: Share your required quantity, destination country, and any packaging preferences.
2. Receive a Detailed Offer: We’ll respond within 24 hours with pricing, lead time, and shipping options.
3. Confirm and Ship: Secure, flexible payment arrangements followed by tracked international delivery.

Contact us today to get your competitive quote on the Output Shaft AZ2225100001 for SINOTRUK HW series gearbox. Whether you need 5 pieces or 500, our team is ready to support your procurement needs with factory-direct pricing and dependable quality.