Product Introduction

• Structure: Precision-forged from high-strength 20CrMnTi alloy steel, with external involute gear teeth and internal splines for press-fit onto the input shaft. The gear undergoes carburizing + quenching + precision grinding, achieving surface hardness HRC 58–62and core hardness HRC 33–45, balancing wear resistance and impact toughness.

• Key Specifications:

• Material: 20CrMnTi carburized steel

• Surface treatment: Carburizing, quenching, gear grinding

• Fit type: Press-fit with internal splines

• Operating temperature: -40°C to +150°C

  • Performance: Hardened, ground tooth surface resists pitting/wear under high torque; tough core withstands shock loads during shifting; precision splines ensure zero-backlash power transfer; quiet meshing under heavy-load conditions.

Core Function

1. Torque Transmission: Transmits engine torque from input shaft to countershaft 2nd gear, delivering strong low-speed torque for heavy-load acceleration and mild climbing.

2. Power Transfer: Smoothly meshes with countershaft 2nd gear to route power through the transmission main box.

3. Wear & Fatigue Resistance: Withstands millions of shifting cycles in heavy hauling, construction, and long-haul scenarios.

Input Shaft 2nd Gear AZ2210040206 – SINOTRUK HW Series Gearbox Replacement Part

When your SINOTRUK HW series gearbox demands a reliable replacement for the input shaft 2nd gear, precision matters more than anything else. The Input Shaft 2nd Gear AZ2210040206 is engineered to restore smooth power transmission and extend the service life of your heavy-duty transmission system. As a factory-direct supplier of genuine-quality SINOTRUK gearbox parts, Mettlead delivers this critical drivetrain component to wholesale distributors and fleet operators worldwide — at prices that protect your margins and with lead times that keep your customers satisfied.

Why Choose the Input Shaft 2nd Gear AZ2210040206 for SINOTRUK HW Gearbox?

The input shaft 2nd gear sits at the heart of the HW series transmission, transferring torque from the engine to the mainshaft assembly. Over time, heavy loads and continuous gear engagement cause tooth wear, micro-pitting, and eventually gear failure. Replacing it with a precision-manufactured AZ2210040206 gear ensures your gearbox performs as it did on day one. Here is what makes this component stand out:

• OEM-Matched Dimensions: Every tooth profile, bore diameter, and spline count is manufactured to match the original SINOTRUK specification, so installation is seamless and no modification is needed.
• High-Grade Alloy Steel Construction: Forged from carburized alloy steel, this gear delivers exceptional hardness on the tooth surface while maintaining a tough, shock-resistant core — ideal for the punishing demands of heavy-truck gearboxes.
• Extended Service Life: Advanced heat treatment and precision grinding reduce friction, lower operating noise, and significantly delay the onset of fatigue-related wear.
• Wholesale-Friendly Pricing: Factory-direct sourcing eliminates middlemen, giving distributors and agents healthier profit margins on every order.
• Tested for Reliability: Each batch undergoes strict quality control inspections — including dimensional verification, hardness testing, and surface finish checks — before shipment.

Technical Specifications – Input Shaft 2nd Gear AZ2210040206

Application Scenarios – Where Does This Gear Fit?

The Input Shaft 2nd Gear AZ2210040206 is specifically designed for the SINOTRUK HW series gearbox, which is widely equipped across heavy-duty truck platforms. If you are sourcing transmission parts for any of the following applications, this is exactly what you need:

• SINOTRUK HOWO A7 / T7H / TX heavy-duty tractor units fitted with HW19710 or HW19712 gearboxes
• SINOTRUK SITRAK C7H long-haul trucks using HW series manual transmissions
• HOWO dump trucks and mixer trucks operating under extreme torque loads in mining and construction environments
• Aftermarket gearbox rebuild and overhaul operations serving fleets in Africa, the Middle East, Southeast Asia, and South America

Whether your customers are rebuilding a complete gearbox or replacing a single worn gear, this component is an essential line item in any comprehensive SINOTRUK HOWO gearbox parts inventory.

OEM/ODM Capability & White-Label Packaging

As a wholesale distributor or regional agent, your brand identity matters. That is why Mettlead offers flexible packaging and labeling options for the Input Shaft 2nd Gear AZ2210040206 and our entire gearbox parts catalog:

• Neutral Packaging: Unbranded boxes suitable for rebranding or integration into your own product line.
• Custom Packaging: Your logo, part numbers, and branding printed directly on the box and labels — perfect for building recognition in your local market.
• Mixed Container Orders: Combine gearbox gears with other SINOTRUK HOWO truck spare parts in a single shipment to reduce logistics costs.
• Factory Visits Welcome: We invite partners to visit our facility in China, inspect production lines, and verify quality processes firsthand.

Customer Case Study – Input Shaft 2nd Gear AZ2210040206 in Action

A long-standing wholesale partner based in East Africa reached out to Mettlead after receiving repeated complaints from fleet operators about premature 2nd gear failure in SINOTRUK HW series gearboxes. Their previous supplier was delivering gears with inconsistent hardness levels, leading to rapid tooth wear under heavy payloads.

After switching to our factory-direct Input Shaft 2nd Gear AZ2210040206, the results spoke for themselves. The gears passed their internal inspection on arrival, fit perfectly during installation without any machining adjustments, and — most importantly — the fleet operators reported zero gearbox-related downtime over the following six months. As a result, this distributor now orders the AZ2210040206 input shaft 2nd gear in bulk every quarter, alongside other SINOTRUK HW gearbox components, and has expanded their product line significantly.

This is the kind of partnership Mettlead builds: reliable parts, consistent quality, and pricing that helps you grow.

Frequently Asked Questions – Input Shaft 2nd Gear AZ2210040206

What gearbox models does the AZ2210040206 input shaft 2nd gear fit?

This gear is designed specifically for the SINOTRUK HW series gearbox family, including the HW19710, HW15710, HW19712, and related variants. It functions as the 2nd gear mounted on the input shaft assembly, making it a critical component during transmission overhauls or targeted gear replacements.

How can I verify that AZ2210040206 is the correct part number for my application?

We recommend cross-referencing the OEM part number AZ2210040206 against your gearbox nameplate data or the original parts manual. If you are uncertain, send us your gearbox model and VIN through our contact page, and our technical team will confirm compatibility within 24 hours.

What material is the input shaft 2nd gear made from?

The AZ2210040206 gear is forged from 20CrMnTi carburized alloy steel (or equivalent grade). After carburizing, quenching, and tempering, the tooth surface reaches HRC 58–62 for wear resistance, while the core remains at HRC 30–45 for impact toughness — the same metallurgical standard used in OEM production.

What causes premature failure of the input shaft 2nd gear in HW gearboxes?

Common causes include insufficient gear oil, contaminated lubricant, overloading beyond rated capacity, and using low-quality replacement gears with improper heat treatment. Installing a precision-manufactured AZ2210040206 gear and maintaining correct lubrication intervals will significantly reduce the risk of early failure.

Can I order a sample before committing to bulk quantity?

Yes. We understand that quality verification is essential before placing large wholesale orders. Sample orders of the Input Shaft 2nd Gear AZ2210040206 are available so you can inspect dimensions, material quality, and finish before scaling up.

Does this gear come pre-assembled or as a standalone component?

The AZ2210040206 is supplied as a standalone gear component. It is designed to be pressed or fitted onto the input shaft during gearbox assembly or rebuild. No additional machining is required when installed in a standard HW series transmission.

Ready to Stock the Input Shaft 2nd Gear AZ2210040206? Let’s Talk.

Mettlead makes it simple to add high-demand SINOTRUK HW gearbox parts to your product catalog. With factory-direct pricing, flexible MOQ arrangements, and reliable global shipping, you get everything you need to serve your customers better and grow your business faster.

Here is how to get started:

1. Tell us your required quantity and preferred packaging format.
2. Receive a competitive wholesale quote within 12 hours.
3. Approve the order and choose your preferred payment method — flexible and secure options available.
4. Receive your shipment on time, inspected and properly packed.

Request your quote now — Contact Us and reference part number AZ2210040206. Our team is ready to support your next order.