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The WG2210100186 quill bearing (Na4824X1N Ya) is a genuine SINOTRUK HOWO component engineered to provide precise rotational support for shafts in heavy‑duty transmissions and auxiliary drives. As a critical element of the trusted Sinotruk howo parts family, this needle roller bearing ensures smooth, low‑friction operation under high radial loads while maintaining accurate shaft alignment. Manufactured from case‑hardened bearing steel with a precision‑ground outer diameter, the WG2210100186 features a cage‑guided needle roller complement that minimizes friction and heat generation. Its robust construction withstands the extreme shock loads and continuous operation found in mining, construction, and long‑haul applications. Investing in this authentic component guarantees extended transmission life, reduced vibration, and reliable power transfer in your Howo chassis.
Quill Bearing Na4824X1N Ya
Игольчатый подшипник
Rodamiento de agujas
The WG2210100186 quill bearing features a full complement of needle rollers retained by a precision steel cage, ensuring even load distribution and minimal frictional losses. The outer ring is made from carburized 20MnCr5 steel, case‑hardened to 60‑64 HRC for exceptional wear resistance, while the inner race (when present) is integrated into the shaft or housing as per design. The bearing is designed to accommodate high radial loads with a small cross‑section, making it ideal for compact transmission assemblies where space is limited.
Each WG2210100186 bearing is manufactured to ISO 492 grade P6 tolerances, ensuring consistent fit and operation. The needle rollers are crowned to prevent edge loading under misalignment, and the bearing is pre‑lubricated with a high‑performance grease suitable for the entire service life. Rigorous quality control includes dimensional inspection, noise testing, and magnetic particle crack detection, guaranteeing that every bearing meets the demanding requirements of Howo transmissions.
The table below provides detailed technical data for the genuine SINOTRUK HOWO WG2210100186 quill bearing. These specifications are essential for verifying compatibility and understanding its performance capabilities.
| Parameter | Specification | Details |
|---|---|---|
| OEM Part Number | WG2210100186 | SINOTRUK HOWO Original Code |
| Product Name | Quill Bearing (Na4824X1N Ya) | Needle roller bearing |
| Bore Diameter (d) | 120 mm | Precision ground |
| Outer Diameter (D) | 150 mm | Tolerance class P6 |
| Width (B) | 30 mm | Single row |
| Dynamic Load Rating (Cr) | 145 kN | ISO 281 calculation |
| Static Load Rating (Cor) | 275 kN | High shock load capacity |
| Material | 20MnCr5 (case‑hardened) | Surface hardness 60‑64 HRC |
| Cage Material | Pressed steel (zinc‑plated) | Guides needle rollers |
| Needle Roller Quantity | 38 rollers | Diameter 5 mm |
| Limiting Speed (grease) | 3000 rpm | Suitable for transmission speeds |
| Applicable Transmissions | HW19710, HW19712, HW25716 | Used in main shaft support |
| Included Components | Bearing only (no housing) | Check packaging |
The WG2210100186 quill bearing is a direct OEM replacement used in the main shaft support of Howo 9‑speed and 16‑speed manual transmissions, including HW19710, HW19712, and HW25716 series. It is typically installed at the rear of the main shaft, providing radial support for the output shaft while allowing it to rotate freely. The bearing also locates the shaft axially when used in conjunction with snap rings, ensuring correct gear engagement and minimizing end float.
In chassis applications, this bearing contributes to smooth power delivery from the transmission to the driveshaft. A worn or damaged quill bearing can cause shaft misalignment, resulting in vibration, gear noise, and accelerated wear of synchronizers and gears. Using the genuine WG2210100186 bearing ensures that the transmission maintains its original performance, reducing downtime and extending the life of driveline components. It is also used in some auxiliary drives and power take‑off (PTO) units where compact, high‑load needle bearings are required.
When replacing a quill bearing, always inspect the shaft and housing for wear or damage. Ensure that the bearing is pressed squarely into its bore to prevent tilting. Use the recommended lubricant and torque specifications.
Correct installation of the WG2210100186 bearing is critical to ensure long life and reliable operation. Follow these steps:
Clean the bearing seat in the housing and the shaft journal thoroughly. Remove any burrs or nicks. Inspect the shaft for wear; if damaged, replace it. Ensure the bearing is at room temperature.
Apply a thin film of assembly oil to the bearing bore. Use an arbor press or suitable driver that contacts only the bearing outer ring. Press the bearing into the housing until it seats against the shoulder. Never apply force through the needle rollers.
After installation, rotate the shaft to ensure smooth, free movement with no binding. If the bearing uses a retaining ring, verify correct engagement. Fill the transmission with the recommended oil before operation.
A worn quill bearing can lead to transmission noise, vibration, and eventual failure. Common signs of wear include:
If any of these symptoms are observed, immediate replacement with a genuine WG2210100186 bearing is recommended. Continuing to operate with a worn bearing can cause damage to gears, synchronizers, and shafts, leading to costly repairs.
The needle roller design provides high radial load capacity in a compact envelope, ensuring reliable support for transmission shafts even under peak torque.
By maintaining precise shaft alignment and reducing friction, the genuine bearing minimizes wear on gears and synchronizers, reducing maintenance costs.
Case‑hardened steel and precision manufacturing ensure that the bearing withstands millions of cycles without fatigue, providing dependable service.
To maximize the service life of your WG2210100186 quill bearing, follow these best practices:
By adhering to these guidelines, you ensure that the WG2210100186 bearing performs optimally throughout its intended service interval.
Aftermarket quill bearings often use lower‑grade steel, inaccurate heat treatment, and loose tolerances, leading to premature wear, noise, and even catastrophic failure. The genuine WG2210100186 is manufactured to the exact specifications of the original equipment, using premium bearing steel and precision heat treatment that ensures consistent hardness and dimensional accuracy. Each bearing is tested for radial clearance, noise, and runout, guaranteeing that it will perform exactly as the original part.
By choosing authentic SINOTRUK HOWO parts, you protect your investment and ensure your truck maintains its reliability and resale value. The Sinotruk howo parts catalog includes a full range of transmission and chassis components engineered for maximum durability. For fleet managers and owner‑operators who demand the best, the genuine WG2210100186 is the only responsible choice.
The WG2210100186 quill bearing is used across a wide range of Howo models: T7H, A7, and classic Howo‑7 series equipped with HW19710, HW19712, and HW25716 transmissions. It also appears in some transfer cases and auxiliary drives. Always verify the bearing position (main shaft rear or intermediate) using the service manual.
Each WG2210100186 is individually wrapped in VCI paper to prevent rust. The packaging is clearly labelled with the OEM number and batch code. For bulk orders, bearings are shipped in sealed cartons with protective foam to avoid transit damage.
Production of the WG2210100186 takes place in IATF 16949 certified facilities, using CNC grinding and super‑finishing processes with in‑process gauging. Statistical process control ensures that dimensional variations are kept to a minimum, far exceeding the requirements of the original design. Every batch is accompanied by a material certificate and hardness test report, guaranteeing that the bearings delivered are identical to those fitted on new Howo trucks at the factory.
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