Product Introduction

• Structure: A cage-type full-complement needle roller bearing, consisting of high-carbon chromium bearing steel (GCr15) needles and a stamped steel cage. The cage evenly spaces the needles to prevent friction between them, and the entire bearing is coated with anti-rust lubricant for long-term storage and initial operation. The bearing is designed for high radial load capacity in a compact axial space.

Performance: The full-complement needle design delivers high radial load capacity, supporting medium-torque transmission in the HW19710 gearbox. The precision-ground needles and cage ensure low-friction rotation, reducing gear meshing noise and improving transmission efficiency. The bearing maintains stable performance under continuous high-speed rotation (up to 6,000 RPM) and resists wear for over 60,000 hours of operation.

Core Function

1. Radial gear support: Provides precise radial positioning for main shaft gears, preventing radial runout and ensuring smooth meshing with countershaft gears.

2. Low-friction sliding: Enables low-resistance rotation of the gear relative to the main shaft, reducing power loss and improving transmission efficiency.

3. High-load durability: Withstands heavy radial loads during medium-torque acceleration and cruising without deformation or premature wear.

Needle Roller Bearing AZ9003395320 for SINOTRUK HW Series Gearbox – Factory Direct Supply

When your SINOTRUK HW Series Gearbox demands precision, reliability, and uncompromising performance, the Needle Roller Bearing AZ9003395320 delivers exactly that. Engineered to meet OEM specifications, this gearbox bearing plays a critical role in reducing friction, supporting radial loads, and ensuring smooth gear transitions under the most demanding operating conditions. Whether you are a wholesaler stocking high-demand spare parts or a distributor serving heavy-truck fleets across Africa, the Middle East, or Southeast Asia, this component offers proven durability that keeps your customers coming back.

At Mettlead, we supply this needle roller bearing directly from our factory in China — eliminating middlemen, reducing your procurement costs, and guaranteeing consistent quality with every shipment. As a result, you gain a competitive edge in your market while maintaining healthy profit margins.

Key Features and Benefits of Needle Roller Bearing AZ9003395320

Understanding exactly what makes this bearing a top choice for SINOTRUK gearbox applications helps you make a confident purchasing decision. Here is what sets the Needle Roller Bearing AZ9003395320 apart:

• OEM-Grade Precision: Manufactured to match original SINOTRUK specifications, this bearing fits seamlessly into HW Series Gearboxes without modification.
• Superior Load Capacity: The needle roller design distributes radial loads evenly across a larger contact area, which significantly extends service life even under heavy torque conditions.
• Low Friction Operation: Thanks to its compact cross-section and optimized roller geometry, this bearing minimizes energy loss and heat generation inside the gearbox.
• High-Quality Steel Construction: Produced from bearing-grade chromium steel (GCr15), it delivers outstanding hardness, wear resistance, and fatigue strength.
• Strict Quality Control: Every batch undergoes dimensional inspection, hardness testing, and surface roughness verification before leaving our facility.
• Cost-Effective Bulk Pricing: Factory-direct pricing means you enjoy wholesale margins that make your business more competitive in local markets.

In other words, choosing this needle roller bearing means fewer warranty claims, happier end-users, and stronger repeat orders for your business.

Technical Specifications – Needle Roller Bearing AZ9003395320

Accurate specifications matter when you are matching parts to specific gearbox assemblies. Below you will find the detailed parameters of the AZ9003395320 Needle Roller Bearing:

If you need additional dimensions or tolerance data for cross-referencing purposes, our technical team is ready to assist. Simply contact us with your requirements.

Application Scenarios – Where Does AZ9003395320 Fit?

The Needle Roller Bearing AZ9003395320 is specifically designed for the SINOTRUK HW Series Gearbox family. Consequently, it finds widespread use in the following applications:

• Compatible Gearbox Models: HW19710, HW15710, HW20716, HW19712, and other HW-series manual transmissions used in SINOTRUK heavy trucks.
• Compatible Vehicle Models: SINOTRUK HOWO A7, HOWO T7H, SITRAK C7H, SITRAK C5H, and various heavy-duty tractor units and dump trucks equipped with HW gearboxes.
• Function Inside Gearbox: This needle roller bearing supports the countershaft or layshaft within the gearbox, handling high radial loads during gear engagement while maintaining minimal rotational resistance.
• Operating Environment: Designed to perform reliably under high-temperature gearbox oil conditions, continuous vibration, and varying load cycles typical of long-haul transport and mining operations.

For a full catalogue of SINOTRUK gearbox components — including synchronizer rings, gear shafts, and seals — explore our gearbox parts category or visit the dedicated SINOTRUK HOWO gearbox parts page.

OEM/ODM Capability and Custom Packaging

As a wholesale distributor or regional agent, your brand identity matters. That is precisely why Mettlead offers flexible OEM and ODM services for the Needle Roller Bearing AZ9003395320 and our entire SINOTRUK parts range:

• White-Label Packaging: We provide neutral packaging so you can apply your own brand labels, giving your business a professional identity in your market.
• Custom Packaging Design: Need branded boxes, holographic stickers, or specific label formats? Our packaging team works with your design files to create a polished retail-ready presentation.
• Private Labeling at Scale: Whether you order 500 or 50,000 pieces, we maintain consistent packaging quality and accurate labeling throughout the production run.
• Quality Documentation: Each shipment can include certificates of conformity, packing lists, and inspection reports tailored to your import requirements.

This flexibility means you can build your own brand around genuine-quality parts without investing in manufacturing infrastructure. To discuss your specific packaging needs, browse our complete SINOTRUK HOWO truck parts collection or reach out directly.

Customer Case Study – Needle Roller Bearing AZ9003395320 in Action

Earlier this year, a wholesale auto parts distributor based in Nigeria approached Mettlead looking for a reliable supply of Needle Roller Bearing AZ9003395320 along with other SINOTRUK HW Series Gearbox components. Their previous supplier had inconsistent quality — bearings would fail prematurely, leading to costly warranty replacements and damaged client relationships.

After placing an initial trial order of 200 pieces of the AZ9003395320 needle roller bearing, the distributor conducted their own incoming inspection and confirmed that dimensions, hardness, and surface finish all met SINOTRUK OEM standards. They subsequently installed these bearings in HW19710 gearboxes being rebuilt for a fleet operator running HOWO A7 tractor units on the Lagos–Kano corridor.

The results spoke for themselves: zero bearing failures reported after six months of continuous heavy-haul service. As a direct consequence, the distributor scaled their quarterly order to 2,000 pieces and expanded their purchase list to include synchronizer assemblies and output shaft bearings from our SINOTRUK HOWO gearbox parts catalogue.

“The AZ9003395320 needle roller bearings from Mettlead eliminated our return rate completely. Our fleet customers now trust us because the gearbox parts last as long as original components.” — Procurement Manager, Lagos-based Auto Parts Wholesaler

Frequently Asked Questions – Needle Roller Bearing AZ9003395320

What is the function of the Needle Roller Bearing AZ9003395320 inside the SINOTRUK HW Gearbox?

The AZ9003395320 needle roller bearing serves as a radial support element within the HW Series Gearbox. It carries the shaft loads generated during gear meshing, reduces rotational friction between moving components, and helps maintain precise shaft alignment. Without a properly functioning needle roller bearing, the gearbox would experience excessive heat, accelerated wear, and eventually gear tooth damage.

How can I verify that AZ9003395320 is the correct bearing for my gearbox model?

You can cross-reference the part number AZ9003395320 against the SINOTRUK HW gearbox parts catalogue or the assembly drawing for your specific transmission model (HW19710, HW15710, etc.). Alternatively, share your gearbox nameplate photo with our team and we will confirm compatibility within 24 hours. Just contact us with the details.

What material is the Needle Roller Bearing AZ9003395320 made from?

This bearing is manufactured from GCr15 chromium bearing steel, heat-treated to achieve a hardness of HRC 60–64. This material grade is the industry standard for high-performance needle roller bearings because it offers excellent wear resistance, fatigue life, and dimensional stability under thermal cycling.

What causes premature failure of needle roller bearings in HW gearboxes?

The most common causes include contaminated gearbox oil (metal particles or moisture ingress), incorrect installation (misalignment or improper preload), use of substandard aftermarket bearings with poor steel quality, and operating with degraded or insufficient lubricant. Using OEM-grade bearings like the AZ9003395320 from a quality-controlled source significantly reduces these risks.

Can I order the AZ9003395320 bearing with my own brand packaging?

Absolutely. Mettlead offers full white-label and custom packaging services. You can supply your own artwork, or our design team can help you create professional packaging that meets your market standards. This service is available at all order volumes, though custom packaging is most cost-effective at larger MOQs.

What is the minimum order quantity for wholesale pricing?

MOQ is flexible and depends on your total order value and product mix. For the Needle Roller Bearing AZ9003395320 specifically, we typically work with orders starting from a few hundred pieces. However, we encourage you to discuss your exact needs so we can offer the best possible unit price for your volume.

Ready to Secure Your Supply of Needle Roller Bearing AZ9003395320?

Stocking the right SINOTRUK HW Series Gearbox parts — at the right price and quality level — gives your business a measurable advantage. The Needle Roller Bearing AZ9003395320 from Mettlead delivers OEM-equivalent performance, strict quality assurance, and pricing that protects your margins.

Here is how to get started:

1. Request a Quote: Tell us your required quantity, destination country, and any packaging preferences.
2. Receive Your Offer: We respond within 24 hours with pricing, lead time, and shipping options.
3. Place Your Order: Flexible payment methods ensure a smooth, secure transaction.
4. Receive and Sell: Fast, reliable logistics get your bearings to your warehouse on schedule.

Do not let gearbox bearing shortages cost you sales. Contact us today to request wholesale pricing on the AZ9003395320 Needle Roller Bearing and our full range of SINOTRUK HOWO truck parts. We are ready to be your trusted supply partner.