Product Introduction

This precision-engineered steel ball is a key part of the vehicle’s clutch system, designed to withstand high pressure and friction for reliable operation in heavy-duty applications.

• Structure & Material: Made from high-carbon chromium bearing steel, it undergoes precision grinding and heat treatment to achieve a smooth, hard surface with exceptional wear resistance.

• Performance: The ball acts as a rolling element in the clutch release bearing, translating the force from the clutch pedal to the pressure plate with minimal friction, ensuring smooth gear shifts and precise clutch control.

• Durability: The hardened steel construction resists deformation and wear, providing long service life even under the high loads and temperatures of commercial vehicle operation.

Core Function

1. Force Transmission: Translates the mechanical force from the clutch pedal to the clutch pressure plate, enabling clutch engagement and disengagement.

2. Low-Friction Movement: The spherical shape allows for smooth rolling motion, reducing friction and wear in the clutch release mechanism.

3. Precision Operation: Ensures consistent and precise clutch actuation, contributing to smooth gear shifts and optimal vehicle performance.

5.500G200b Steel Ball AZ9003335500 – SINOTRUK HW Series Gearbox Replacement Part

When your SINOTRUK HW series gearbox demands precision components that keep heavy-duty trucks running smoothly, the 5.500G200b Steel Ball (Part No. AZ9003335500) delivers exactly what you need. Engineered to meet OEM specifications, this gearbox steel ball plays a critical role in ensuring seamless gear shifting and long-term transmission reliability. At Mettlead, we supply this genuine-quality component at factory-direct prices, so your fleet stays on the road and your procurement budget stays on track.

Why Choose the 5.500G200b Steel Ball for SINOTRUK HW Gearbox?

Every component inside a heavy-truck gearbox must withstand extreme pressure, constant friction, and temperature fluctuations. The AZ9003335500 steel ball is no exception. Here is what makes it a dependable choice for your transmission system:

• Precision-Engineered Dimensions: Manufactured to exact 5.500mm specifications, this steel ball fits perfectly within the HW series gearbox assembly, eliminating play and reducing wear on surrounding components.
• High-Grade Steel Composition: Crafted from hardened bearing steel, it resists deformation under heavy loads and maintains its spherical integrity over hundreds of thousands of kilometers.
• Smooth Gear Engagement: By functioning as a reliable detent or positioning element inside the gearbox, this steel ball ensures crisp, positive gear selection every time the driver shifts.
• OEM-Equivalent Quality: Produced under strict quality control processes, the part meets or exceeds the original SINOTRUK factory standards—so you get OEM performance without the OEM price tag.
• Extended Service Life: Thanks to surface finishing and heat treatment, this component resists pitting and corrosion, which translates to fewer replacements and lower total cost of ownership.

Technical Specifications – AZ9003335500 Steel Ball

Accurate specifications matter when you are sourcing gearbox components for a mixed fleet. Below is a complete breakdown of this part’s technical parameters:

Application Scenarios – Where Does the 5.500G200b Steel Ball Fit?

Understanding exactly where and how a component functions helps you make confident purchasing decisions. The 5.500G200b steel ball AZ9003335500 serves as a detent ball within the shift mechanism of the SINOTRUK HW series gearbox. In other words, it sits inside the gearbox housing and locks each gear position into place, preventing accidental disengagement during operation.

Compatible Gearbox & Vehicle Models

• Gearbox Series: SINOTRUK HW series manual transmission (HW19710, HW15710, HW19712, and related variants)
• Applicable Vehicles: SINOTRUK HOWO A7, HOWO T7H, SITRAK C7H, and other heavy-duty trucks equipped with HW-series gearboxes
• Typical Use Cases: Long-haul logistics trucks, mining dump trucks, construction vehicles, and any heavy-duty application where the HW gearbox is deployed

Whether your trucks are hauling cargo across African highways, navigating Southeast Asian terrain, or operating in Middle Eastern heat, this steel ball maintains consistent performance under all conditions.

Looking for more SINOTRUK gearbox components? Browse our full Gearbox Parts Category or explore our dedicated SINOTRUK HOWO Gearbox Parts page for a complete selection.

OEM/ODM Capability – Tailored to Your Business Needs

At Mettlead, we understand that different markets have different requirements. That is why we offer flexible options beyond standard supply:

• 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: Whether you require individual blister packs, bulk industrial packaging, or specific labeling for regional compliance, our team accommodates your requests.
• Strict Quality Control: Every batch of AZ9003335500 steel balls undergoes dimensional inspection, hardness testing, and surface quality checks before shipment. We provide inspection reports upon request.
• Factory-Direct Pricing: By sourcing directly from our facility in China, you eliminate middlemen and protect your margins—especially important for high-volume procurement.
• Fast & Reliable Delivery: With established logistics partnerships, we ship globally via sea, air, or express courier, ensuring your parts arrive when promised.

Discover more about our full range of SINOTRUK products on our SINOTRUK HOWO Truck Parts brand page.

Customer Case Study – AZ9003335500 Steel Ball in Action

Earlier this year, a fleet management company in East Africa reached out to us with an urgent challenge. They operated over 120 SINOTRUK HOWO trucks, and their drivers were reporting increasingly rough gear shifts. After inspection, their maintenance team traced the issue to worn detent steel balls inside the HW series gearboxes.

The procurement manager needed a reliable supplier who could deliver 5.500G200b steel balls (AZ9003335500) in bulk—quickly and affordably. After comparing three suppliers, they chose Mettlead for our competitive factory-direct pricing and our willingness to supply custom-labeled packaging for their internal inventory system.

We shipped 2,000 pieces within 10 days. After installation, the fleet reported smooth gear engagement restored across all trucks, and the maintenance team confirmed zero failures over a six-month follow-up period. Today, this client reorders SINOTRUK HW series gearbox parts from us on a quarterly basis.

Frequently Asked Questions – 5.500G200b Steel Ball AZ9003335500

What is the function of the 5.500G200b steel ball in the SINOTRUK HW gearbox?

The steel ball acts as a detent component within the gear shift mechanism. It locks each gear position securely, preventing gears from slipping out during vehicle operation. Without a properly sized and hardened steel ball, drivers may experience gear pop-out or difficulty maintaining selected gears under load.

Is part number AZ9003335500 an OEM or aftermarket part?

The AZ9003335500 steel ball supplied by Mettlead is an OEM-equivalent aftermarket part. It is manufactured to match the original SINOTRUK specifications in terms of diameter, material composition, hardness, and surface finish. You get the same performance at a more competitive price point.

What precision grade does “G200b” indicate?

The G200b designation refers to the ball’s precision grade according to international standards. A G200 grade means the dimensional tolerance, sphericity, and surface roughness fall within tight limits—suitable for industrial gearbox applications where consistent ball geometry is essential for reliable operation.

How can I verify this steel ball fits my specific HW gearbox model?

Cross-reference the part number AZ9003335500 against your gearbox assembly diagram or maintenance manual. If you are unsure, send us your gearbox model number and VIN, and our technical team will confirm compatibility for you.

What causes steel balls to wear out in a gearbox?

Over time, repeated contact pressure during gear changes creates micro-pitting on the ball surface. Contaminated gearbox oil, overheating, or extended service intervals accelerate this wear. Once the ball loses its spherical accuracy, gear engagement becomes inconsistent—which is why timely replacement with a quality steel ball like the AZ9003335500 matters.

Can I order this steel ball in large quantities with custom packaging?

Absolutely. Mettlead supports bulk orders with white-label or custom packaging. Whether you need 500 pieces or 50,000 pieces, we scale production and packaging to meet your requirements. Contact our team for volume pricing.

Ready to Source Your 5.500G200b Steel Ball AZ9003335500?

Getting the right SINOTRUK HW gearbox parts should not be complicated. At Mettlead, we make it simple: factory-direct quality, transparent pricing, flexible payment options, and reliable global delivery. Whether you are restocking a single part or building a full inventory of gearbox components, our team is ready to support you.

Take the next step today. Send us your inquiry with your required quantity and delivery destination, and we will respond with a competitive quote within 24 hours. You are also welcome to visit our facility in China for an on-site inspection.

Contact Us Now to Request a Quote