Genuine Sinotruk Bearing 32311Х2А1 – Unmatched Durability for Heavy-Duty Rotating Assemblies
Precision Rolling Elements for Howo & Sinotruk Drivetrains
The Sinotruk Bearing 32311Х2А1 is a genuine OEM tapered roller bearing engineered to handle extreme radial and axial loads in heavy-duty truck applications. As a critical component in your Howo or Sinotruk axle, transmission, or wheel hub, the 32311Х2А1 ensures smooth rotation, minimal friction, and exceptional load-carrying capacity — even under the most punishing Nigerian operating conditions.
This 32311Х2А1 bearing is manufactured from high-purity alloy steel, case-carburised and hardened to achieve a tough core with a wear-resistant surface. Its precision-ground rollers and raceways provide superior geometric accuracy, reducing vibration and extending the service life of your drivetrain. Trust the genuine Sinotruk 32311Х2А1 to deliver the reliability and performance your fleet demands.
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Engineering Excellence Behind the 32311Х2А1 Bearing
The 32311Х2А1 bearing represents the pinnacle of Sinotruk’s rolling-element engineering. It is a single-row tapered roller bearing designed to accommodate both radial and thrust loads, making it ideal for applications such as differential pinions, wheel hubs, and transfer case outputs. The tapered geometry ensures that the rollers maintain line contact with the raceways, distributing stress evenly and reducing edge loading that can cause premature spalling.
In a typical Howo heavy-duty truck, the 32311Х2А1 bearing operates under high torque, frequent shock loads, and continuous thermal cycling. Its cage is made from reinforced polyamide or steel, depending on the variant, and is precision-guided to ensure uniform roller spacing and low running noise. The bearing’s internal clearance is optimised for long service intervals, reducing the need for frequent re-shimming or adjustment.
Nigerian roads, with their combination of potholes, unpaved sections, and heavy traffic, subject bearings to extreme stress. The 32311Х2А1 is built with a high-temperature grease fill that remains stable up to 120°C, and its seals (where applicable) effectively exclude water, dust, and abrasive particles. This robust construction ensures that the bearing maintains its preload and rotational accuracy throughout its service life.
Technical Specifications – Bearing 32311Х2А1
| Parameter | Specification |
|---|---|
| OEM Part Number | 32311Х2А1 |
| Product Name | Tapered Roller Bearing |
| Brand | Sinotruk (Genuine OEM) |
| Bore Diameter (d) | 55 mm |
| Outer Diameter (D) | 120 mm |
| Width (B / T) | 45.5 mm (inner) / 47.0 mm (total) |
| Dynamic Load Rating (C) | 168 kN |
| Static Load Rating (C₀) | 208 kN |
| Limiting Speed (grease) | 3,800 rpm |
| Limiting Speed (oil) | 5,000 rpm |
| Material | Case-carburised alloy steel (SAE 5120 / 20CrMnTi) |
| Hardness (HRC) | 58 – 62 (raceway), 30 – 45 (core) |
| Precision Class | ISO P6 (ABEC 3) |
| Lubrication | High-temp lithium complex grease (initial fill) |
| Compatible Applications | Howo drive axles, wheel hubs, differentials; Sinotruk transmissions |
Why the Genuine Sinotruk 32311Х2А1 Outperforms Generic Bearings
Aftermarket bearings often use lower-grade steel, inconsistent heat treatment, and coarse surface finishes that lead to rapid wear and premature failure. The 32311Х2А1, however, is produced using advanced forging and turning processes, followed by controlled carburising and hardening cycles that create a tough, wear-resistant case while maintaining a ductile core to absorb shock loads. This results in a bearing that can withstand the high shock loads of Nigerian roads without fracturing or spalling.
Furthermore, the 32311Х2А1 features precision-honed raceways and superfinished rollers that reduce friction and operating temperatures. Its cage is designed to manage roller skewing, ensuring that every roller shares the load evenly. This level of engineering is what makes the genuine 32311Х2А1 the preferred choice for professional workshops and fleet operators who demand maximum uptime.
Superior Metallurgy for Harsh Environments
The alloy steel used in the 32311Х2А1 is formulated with chromium, manganese, and molybdenum to provide high hardenability and resistance to rolling contact fatigue. Its carburised case offers excellent resistance to abrasive wear from contaminants, while the core remains tough to withstand impact loads from potholes and rough terrain. This combination ensures that the 32311Х2А1 maintains its dimensional stability and load-carrying capacity over extended service intervals.
Compatibility Across Howo and Sinotruk Drivelines
The 32311Х2А1 is a direct replacement for the original bearing in many Howo and Sinotruk axle and transmission assemblies. It is used in the differential pinion shafts, wheel hubs of drive axles, and in some transfer cases. Its dimensions and internal geometry match OEM specifications precisely, so you can install it with confidence without any shim adjustments (though preload verification is always recommended).
Explore the full catalogue of genuine Howo Parts available for your fleet, including axle shafts, seals, and complete overhaul kits. The 32311Х2А1 bearing is a critical component of that ecosystem — and with Sinotruk’s original quality, you ensure that your drivetrain rotates smoothly and reliably, kilometre after kilometre.
Installation Best Practices for the 32311Х2А1 Bearing
Proper installation of the 32311Х2А1 is essential to achieve full service life. Always use a bearing press to install the bearing, applying force evenly to the press-fit ring (inner ring for shaft mount, outer ring for housing mount). Never hammer on the bearing or apply force through the rolling elements. Ensure that the shaft and housing are clean, free of burrs, and within the specified dimensional tolerances.
When fitting the 32311Х2А1, pack the bearing cavity with a high-quality lithium or polyurea grease if it is not pre-lubricated. Follow the manufacturer’s recommended torque for the retaining nut or locknut to achieve the correct preload. After installation, rotate the assembly to check for smoothness and listen for any abnormal noise. For Nigerian workshops, keeping a small stock of 32311Х2А1 bearings can minimise downtime when a wheel-end or differential fails, especially during peak haulage seasons.
Built for Nigeria – Unwavering Reliability on African Roads
Nigeria’s trucking environment is among the most challenging in the world — with road conditions that vary from smooth highways to rutted tracks, combined with high ambient temperatures and heavy traffic. The 32311Х2А1 bearing is specifically engineered to thrive in these conditions, with its robust case-carburised construction, high-temperature grease, and effective sealing (where applicable) that keeps contaminants out.
Moreover, the 32311Х2А1 is fully compatible with the axle lubricants commonly used in Nigeria, including SAE 90 and 140 gear oils, as well as semi-synthetic blends. Its ability to maintain low friction and stable clearance over a wide temperature range ensures that your drivetrain runs cool and efficiently, reducing fuel consumption and prolonging the life of adjacent components such as gears and shafts.
Secure Your Drivetrain with the Genuine 32311Х2А1
The 32311Х2А1 bearing is a fundamental component that directly influences the reliability and performance of your Howo or Sinotruk truck. Its superior materials, precision manufacturing, and exact OEM fitment make it the only choice for professional maintenance. By installing a genuine Sinotruk 32311Х2А1, you are protecting your axle, differential, and wheel ends from the costly effects of bearing failure, which can lead to extensive damage and unplanned downtime.
Do not compromise with generic bearings that may not meet the required load ratings or material standards. Insist on the genuine 32311Х2А1 — the bearing that is trusted by Nigeria’s leading fleet operators and workshops. With its proven durability and uncompromising quality, this bearing delivers the smooth, reliable operation that keeps your business moving forward.
Genuine Sinotruk 32311Х2А1 – Strength, precision, and durability for every rotation.
Packaging & Shipping
Every Howo part is carefully packaged and shipped to ensure it arrives in perfect condition, ready for installation. Our professional logistics process guarantees timely delivery across Nigeria.
Secure Packaging
Each Howo part is individually wrapped in protective materials and placed in reinforced cardboard boxes to prevent damage during transit.
Dedicated Transport
We use our own Sinotruk logistics fleet for reliable delivery, ensuring parts reach customers quickly and safely across all regions of Nigeria.
Quality Inspection
Before shipping, each part undergoes final quality checks and is clearly labeled with its OEM number for easy identification.
Nationwide Distribution
Our extensive distribution network covers all major cities and rural areas in Nigeria, ensuring prompt delivery to construction sites, workshops, and businesses.
Shipping Information for Nigerian Customers
• Standard Delivery: 3-5 business days to major cities (Lagos, Abuja, Port Harcourt, Kano)
• Express Delivery: 1-2 business days available for urgent orders
• Regional Coverage: We deliver to all 36 states including remote areas
• Tracking: All shipments include real-time tracking information
Upgrade Your Sinotruk Truck Today with Howo parts!
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