Cylindrical Roller Bearings NNU Series

Product Details

NNU 49 series double row cylindrical roller bearings have three integral flanges on the outer ring and no flanges on the inner ring.
It available with either a cylindrical or a 1:12 tapered bore (designation suffix K). In machine tool applications, cylindrical roller bearings with a tapered bore are preferred over bearings with a cylindrical bore, because the taper enables more accurate adjustment of clearance or preload during mounting.
Bearings in the NNU 49 series, with a very low cross-sectional height, provide a higher degree of stiffness than bearings in the NN 30 series, but a somewhat lower load carrying capacity.

Cylindrical roller bearings are advanced mechanical components designed to provide high load capacity, excellent rigidity and outstanding performance in demanding industrial environments. Featuring cylindrical rolling elements arranged in a precise configuration, these bearings deliver reliable rotation and enhanced durability, making them ideal for applications requiring strong support and efficient motion control. Our cylindrical roller bearings are engineered to meet the requirements of automotive systems, heavy machinery, electric motors, gearboxes and precision equipment.

🔧 Structural Features
Cylindrical roller bearings are constructed with rollers that maintain continuous line contact with the raceways. This unique design reduces friction, minimizes heat generation and supports high radial loads even under heavy operating conditions. The bearings also offer superior speed capability thanks to optimized internal geometry and high quality materials. Multiple configurations are available, including single row, double row and multi row variants, allowing customers to select the best option for their equipment.

🚀 Performance Advantages
Our cylindrical roller bearings provide several key performance benefits. The optimized roller profile ensures smooth operation and reduces stress concentration, extending service life. Advanced heat treatment and precise machining improve dimensional stability and durability. Additionally, the bearings are engineered for low noise and minimal vibration, making them suitable for high precision applications. Their excellent load carrying capability and strong resistance to wear support consistent performance under varying speeds and temperatures.

🏭 Wide Application Range
Cylindrical roller bearings are widely used across multiple industries due to their strength and reliability. They play a critical role in industrial motors, machine tools, compressors, pumps, wind turbines and steel production equipment. In automotive applications, they ensure stable rotation and enhanced power transmission within transmissions, differential systems and wheel support structures. Their versatility makes them a preferred choice for modern engineering solutions.

🛠️ Quality and Materials
Each cylindrical roller bearing is manufactured using premium alloy steel with strict quality control standards. The advanced surface finishing process improves lubrication effectiveness and reduces frictional wear. Customers can choose from a variety of cage materials, such as steel, brass or polymer, depending on speed and load requirements. The combination of robust materials and precise craftsmanship ensures long term reliability and optimal performance in real world working conditions.

📦 Customization and Support
We provide customized cylindrical roller bearings tailored to specific industry needs. Options include special clearances, precision grades, seal types and lubrication solutions. Our technical team offers professional support, helping customers select suitable bearing models and ensuring the best installation and maintenance practices.

The installation workshop and grinding machine workshop have been built to high standards, industry-leading production equipment and testing instruments have been introduced, and corresponding functional areas such as warehouses and dormitories have been equipped to create a first-class hardware environment.

The company is located in Panzhuang Industrial Park, Linqing, with a total construction area of more than 30,000 square meters. The installation workshop and grinding machine workshop have been built to high standards, industry-leading production equipment and testing instruments have been introduced, and corresponding functional areas such as warehouses and dormitories have been equipped to create a first-class hardware environment.

The products have reliable quality and stable performance and are sold well in the national market and exported to Southeast Asia, Europe, South America, the Middle East and other regions. They enjoy a good reputation in the international market and have contributed the wisdom and power of Made in China to the development of global industrialization!