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The SPWL0000000306 Needle Roller Bearing Half Type K404532.6WD is a compact, high-capacity bearing designed for use in tight radial spaces within SINOTRUK Sitrak transmissions and auxiliary gearboxes. This OEM-grade half-type needle roller bearing provides exceptional load-carrying capability while minimizing friction and axial space requirements. As an essential element among Sinotruk Sitrak parts, the SPWL0000000306 is engineered with a precision-ground outer ring and a full complement of needle rollers, ensuring smooth rotation and long service life under high radial loads. The bearing’s half-type construction allows for easy installation in applications where a full-width bearing is not feasible, making it a preferred choice for planetary gear sets and shaft supports.
Needle Roller Bearing Half Type K404532.6WD
Игольчатый роликовый подшипник половинного типа K404532.6WD
Rodamiento de Rodillos de Aguja Medio Tipo K404532.6WD
The SPWL0000000306 is a half-type needle roller bearing (also known as a drawcup or open-end bearing) that features a thin-walled outer ring and a full complement of needle rollers retained by a cage. Its compact cross-section allows it to be used in applications with limited radial space, while still providing high load-carrying capacity. This bearing is commonly found in SINOTRUK Sitrak manual and automated transmissions, transfer cases, and power take-off units.
Manufactured from high-grade bearing steel with a case-hardened outer ring, the SPWL0000000306 offers excellent wear resistance and fatigue strength. The rollers are precision-ground to ensure uniform load distribution and minimal noise. By choosing the genuine SPWL0000000306, you ensure proper fitment and reliable operation in your Sitrak driveline.
Compact Half-Type Design: The bearing’s open-end construction allows for simple installation on shafts where a full-width bearing cannot be used, saving axial space and reducing weight.
High Radial Load Capacity: With a large number of small-diameter rollers, the SPWL0000000306 offers excellent load distribution and can handle heavy radial loads at moderate speeds.
Precision Ground Components: Both the outer ring and the needle rollers are super-finished to ensure smooth rotation, low friction, and extended service life even under continuous operation.
Robust Steel Cage: The pressed steel cage retains the rollers evenly, preventing skewing and reducing wear, while also providing effective lubrication distribution.
Additionally, this bearing features a black oxide coating for temporary corrosion protection during storage, and its standard dimensions ensure interchangeability with other OEM equivalents. These attributes make the SPWL0000000306 a reliable choice for transmission rebuilds and preventive maintenance.
The following table lists all critical dimensions and performance parameters for this bearing. These specifications are verified against SINOTRUK original equipment standards.
All dimensions and load ratings are in accordance with DIN 617 and ISO 3030 standards. Always confirm fitment with your transmission assembly drawing.
The SPWL0000000306 is primarily used in SINOTRUK Sitrak C7H, T7H, and A7 series transmissions, as well as in auxiliary gearboxes and power take-off units. Its half-type design makes it ideal for use in planetary gear sets, where space is constrained and a full-width bearing cannot be accommodated.
This bearing is also compatible with many other heavy-duty commercial vehicle transmissions that employ the same internal dimensions, making it a versatile replacement option for workshops. Always verify the inner and outer diameters and width before installation.
Installation Guide: Carefully clean the shaft and housing bore. Apply a thin layer of high-quality EP grease to the bearing bore and rollers. Press the bearing onto the shaft using a suitable sleeve – never apply force directly to the cage. Ensure the bearing is fully seated against the shoulder. The half-type design allows for easy orientation; make sure the open end faces the correct direction.
Maintenance Advice: Inspect the bearing during transmission overhauls. Look for roller wear, cage deformation, or discoloration. Replace the SPWL0000000306 if any signs of fatigue are visible. Always use the recommended lubricant type and quantity to ensure optimal cooling and wear protection.
Using a genuine SPWL0000000306 ensures the correct roller crowning and cage design, which are essential for even load distribution. Avoid mixing components from different suppliers to prevent premature failure.
Opting for the authentic SPWL0000000306 guarantees a bearing that has passed stringent quality inspections, including dimensional accuracy, roller roundness, and cage integrity. Unlike aftermarket copies, this bearing is designed to match the exact internal clearances and load specifications of SINOTRUK Sitrak transmissions.
The SPWL0000000306 is backed by SINOTRUK’s original quality assurance, ensuring long service life and reduced maintenance costs. Fleet operators report smoother gear changes and fewer transmission failures after switching to genuine bearings.
The SPWL0000000306 complies with ISO 3030 and DIN 617 standards for needle roller bearings. It is manufactured under IATF 16949 certified processes, ensuring high reliability. The steel used meets ASTM A295 specifications for bearing-quality material.
To avoid counterfeits, purchase this bearing from authorized SINOTRUK distributors. Genuine bearings are laser-engraved with the part number and a batch code. Using non-certified bearings can lead to catastrophic gearbox failure and costly repairs.
Although the SPWL0000000306 is robust, some problems can arise. Excessive noise or vibration often indicates roller damage or insufficient lubrication – disassemble, inspect, and replace if needed. If the cage becomes deformed, check for misalignment or excessive thrust load.
Overheating may result from over-greasing or using the wrong viscosity. Always follow the manufacturer’s lubrication recommendations. If a bearing repeatedly fails, inspect the shaft and housing for wear or out-of-roundness. Replacing with a new SPWL0000000306 and correcting the root cause will restore reliable operation.
SINOTRUK is committed to eco-friendly production. The SPWL0000000306 is manufactured using energy-efficient processes, and the steel is sourced from recycled content. Its durable construction reduces the frequency of replacements, lowering waste and material consumption.
By maintaining proper lubrication and timely replacement, you also reduce energy losses from friction, contributing to improved fuel economy. Used bearings can be recycled at metal scrapyards, supporting the circular economy.
The SPWL0000000306 Needle Roller Bearing Half Type K404532.6WD is a high-performance, space-saving solution for the transmission systems of SINOTRUK Sitrak trucks. Its compact design, high radial load capacity, and precise manufacturing ensure smooth power delivery and extended gearbox life.
In this guide, we have covered the bearing’s features, specifications, installation best practices, and sustainability aspects. With this information, you can confidently choose the genuine component that maximizes uptime and minimizes maintenance overhead.
Explore our full range of authentic SINOTRUK Sitrak components and keep your fleet operating at peak efficiency. Choose the SPWL0000000306 – the trusted bearing solution for professionals worldwide.
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