Product Introduction

This spiral bevel gear set (28-17 ratio) is a precision-engineered pair consisting of a drive pinion and a crown wheel, manufactured from high-strength alloy steel through a process of precision forging, carburizing heat treatment, and multi-stage grinding. The spiral tooth profile is precision-cut to ensure smooth meshing between the pinion and crown wheel, reducing noise and vibration while maximizing power transmission efficiency. The gear set undergoes strict quality control, including dimensional inspection and surface hardness testing, to meet OE specifications for heavy-duty operation. Its robust construction and optimized tooth geometry enable it to withstand the high torque loads and dynamic stresses encountered in heavy-duty truck applications, making it ideal for long-haul and heavy-load transportation.

Core Function

• Reduces the high-speed, low-torque input from the transmission to the low-speed, high-torque output required for driving the wheels, with a fixed ratio of 28:17.

• Changes the direction of power transmission by 90 degrees, transferring torque from the drive shaft to the axle shafts.

• Ensures smooth and efficient meshing between the pinion and crown wheel, minimizing power loss, noise, and vibration during operation.

• Withstands high torque loads and heavy-duty operating conditions, providing reliable performance and extended service life.

• Directly interchangeable with the original factory part, ensuring a precise fit and consistent performance within the main reducer assembly.

Pinion And Crown Wheel Gear 28-17 WG9231320913 Sinotruk – Factory Direct Supply

When it comes to keeping your Sinotruk heavy-duty trucks running at peak performance, the rear axle drive system deserves nothing less than precision-engineered components. The Pinion And Crown Wheel Gear 28-17 WG9231320913 is a critical transmission component that ensures smooth power delivery from the driveshaft to the rear wheels. Mettlead supplies this OEM-spec crown wheel and pinion gear set directly from China’s manufacturing base, offering procurement managers the ideal balance of quality, competitive pricing, and reliable delivery timelines.

Whether you are maintaining a fleet of Sinotruk HOWO tractor units or sourcing replacement parts for aftermarket distribution, this gear set is built to handle the demanding torque loads that heavy-duty trucking requires. Moreover, our factory-direct model means you get genuine quality without the markup of middlemen.

Key Features and Benefits of Pinion And Crown Wheel Gear 28-17 WG9231320913

Understanding what makes this crown wheel and pinion gear set stand out will help you make a confident purchasing decision. Here is why procurement professionals across Africa, the Middle East, Southeast Asia, and South America trust this component:

• Precise Gear Ratio (28/17): The 28-17 tooth configuration delivers the exact reduction ratio your Sinotruk rear axle demands, ensuring optimal torque multiplication and fuel efficiency under heavy loads.
• OEM Part Number WG9231320913: This part number guarantees direct compatibility with Sinotruk HOWO vehicles, eliminating guesswork during installation and reducing costly downtime.
• Premium Alloy Steel Construction: Manufactured from high-strength alloy steel with carburizing and hardening treatment, the gear surfaces resist pitting, spalling, and premature wear even under extreme operating conditions.
• Precision Ground Tooth Profile: Each gear undergoes CNC grinding to achieve tight tolerances, which translates to quieter operation, reduced vibration, and extended service life.
• Matched Gear Set: The pinion and crown wheel are lapped together as a matched pair, ensuring proper contact patterns right out of the box. Consequently, installation time is minimized.
• Factory Direct Pricing: By sourcing directly from Mettlead, you bypass distributors and access competitive wholesale pricing that protects your profit margins.
• Strict Quality Control: Every gear set passes through multiple inspection stages including hardness testing, dimensional verification, and contact pattern checks before shipment.

In addition, Mettlead supports white-label and custom packaging options, so you can seamlessly integrate these parts into your own brand portfolio. This flexibility is particularly valuable for distributors who want to build brand recognition in their local markets.

Technical Specifications – Pinion And Crown Wheel Gear 28-17 WG9231320913 Sinotruk

Accurate specifications matter when you are sourcing drivetrain components for heavy trucks. The table below provides the essential parameters for this crown wheel and pinion gear set:

If you need additional technical data such as detailed dimensional drawings or material certificates, our team is ready to provide documentation upon request. Simply contact us with your specific requirements.

Application Scenarios – Where This Crown Wheel and Pinion Gear Set Performs

The Pinion And Crown Wheel Gear 28-17 WG9231320913 is specifically designed for the following applications:

• Compatible Vehicles: This gear set fits Sinotruk HOWO heavy-duty trucks and tractor units equipped with the corresponding rear axle assembly.
• Functional Role: It serves as the main drive and driven bevel gear assembly (主从动锥齿轮组) within the rear axle reduction system, transferring engine torque from the driveshaft to the differential and ultimately to the drive wheels.
• Rear Axle Reduction Drive: Engineered for rear axle final drive applications, this gear set reduces driveshaft speed while multiplying torque to meet the demands of heavy hauling, construction site logistics, and long-distance freight transport.
• Speed Ratio Matching: The 28/17 ratio is calibrated to match specific operating conditions and vehicle configurations. Therefore, it is essential to verify that your vehicle’s axle specification calls for this exact ratio before ordering.

From mining haul roads in Africa to highway freight corridors in Southeast Asia, this gear set proves its durability in the harshest working environments. Regardless of your operating conditions, proper ratio matching ensures your trucks deliver maximum pulling power with optimized fuel consumption.

Looking for other Sinotruk drivetrain and rear axle components? Browse our complete rear axle parts catalog or explore the full range of Sinotruk HOWO truck parts available from Mettlead.

OEM/ODM Capability – Tailored Solutions for Your Market

At Mettlead, we understand that different markets have different requirements. That is why we offer flexible OEM and ODM services for crown wheel and pinion gear sets:

• White-Label Packaging: Receive your pinion and crown wheel gear sets in neutral packaging, ready for your own branding. This option is ideal for distributors who want to build a recognizable parts brand in their territory.
• Custom Packaging Design: We can produce packaging with your logo, part numbers, and branding materials. As a result, your customers see a professional, branded product from the moment they open the box.
• Quality Certification Support: Need specific test reports or material certificates for your market’s import requirements? We provide comprehensive documentation to support your compliance needs.
• Flexible Order Quantities: Whether you need a trial order for market testing or a bulk shipment for ongoing supply, our production capacity accommodates various order sizes.
• Complete Product Range: Beyond this 28/17 ratio gear set, we supply multiple gear ratios and axle components for the full Sinotruk lineup. Visit our Sinotruk truck parts page to see the comprehensive catalog.

Our factory-direct model eliminates unnecessary layers in the supply chain. Consequently, you benefit from shorter lead times and more competitive unit costs compared to traditional trading company sourcing.

Frequently Asked Questions – Pinion And Crown Wheel Gear 28-17 WG9231320913

What does the “28-17” in this pinion and crown wheel gear set mean?

The numbers 28-17 refer to the tooth count of each gear in the set. Specifically, the crown wheel (ring gear) has 28 teeth while the pinion gear has 17 teeth. This gives a final drive ratio of approximately 1.647:1, which determines the speed reduction and torque multiplication in the rear axle. It is crucial to match this ratio exactly to your vehicle’s original specification to maintain proper performance.

How do I verify that WG9231320913 is the correct part number for my truck?

First, check your vehicle’s original maintenance manual or the data plate on the rear axle housing. The OEM part number WG9231320913 corresponds to a specific Sinotruk HOWO rear axle configuration. If you are unsure, you can send us your Vehicle Identification Number (VIN) or axle model number, and our technical team will confirm compatibility for you.

Can I replace only the pinion or only the crown wheel instead of the full set?

We strongly advise against replacing only one gear from the pair. The pinion and crown wheel are precision-lapped together as a matched set during manufacturing. Installing a new pinion with a worn crown wheel (or vice versa) will result in improper tooth contact patterns, excessive noise, accelerated wear, and potential gear failure. Always replace them as a complete pair to ensure reliable performance.

What surface hardness should I expect from this gear set?

The tooth surfaces undergo carburizing and quenching treatment to achieve a hardness of HRC 58–63, while the gear core maintains HRC 33–40. This combination provides excellent wear resistance on the contact surfaces while retaining toughness in the core to absorb shock loads without cracking. In other words, the gear is hard where it needs to be and tough where it counts.

How should this crown wheel and pinion gear be installed for optimal service life?

Proper installation is essential for longevity. First, ensure the axle housing is clean and free of metal debris. Next, set the correct pinion bearing preload and pinion depth according to factory specifications. Then, adjust the crown wheel backlash and verify the tooth contact pattern using marking compound. Finally, use the recommended gear oil grade and fill to the specified level. If your workshop lacks the precision tools for these adjustments, we recommend having an experienced technician perform the installation.

What is the typical lead time for orders of this pinion and crown wheel gear set?

Lead time depends on your order quantity and current stock availability. For standard quantities, we typically ship within 7–15 working days. Larger bulk orders may require 20–30 days for production. To get an accurate timeline for your specific order, please contact us with your quantity requirements.

Ready to Source Your Pinion And Crown Wheel Gear 28-17 WG9231320913?

Getting a competitive quote for this Sinotruk crown wheel and pinion gear set is simple. Whether you need pricing for a single set or a container-load order, our sales team responds within 24 hours with detailed pricing, lead time, and shipping options tailored to your destination.

Here is what to include in your inquiry for the fastest response:

1. Part number confirmation (WG9231320913)
2. Required quantity
3. Destination port or city
4. Preferred packaging (neutral or custom branded)
5. Any specific documentation needs (COO, test reports, etc.)

Contact Mettlead now to request your quotation and experience factory-direct pricing, strict quality control, and dependable logistics that thousands of truck parts buyers worldwide already rely on.

Meanwhile, feel free to explore our full inventory of Sinotruk HOWO truck spare parts, browse the rear axle components catalog, or visit our comprehensive Sinotruk parts hub to find everything you need in one place.