Heavy-Duty High Load Precision NJ EM Series Cylindrical Roller Bearing for Gearboxes
Our cylindrical roller bearings are suitable for transmissions, motors, machine tools and heavy industrial equipment, featuring a long service life, reduced maintenance requirements and optimized power transmission performance.
Product Design and Core Specifications
A cylindrical roller bearing is characterized by its cylindrical rolling elements with a length typically greater than their diameter. This linear contact with the raceways, as opposed to the point contact in ball bearings, is the key to its exceptional performance. We offer a comprehensive range of standard types and sizes:
- Standard Series: Includes popular series such as 氮, NU, NJ, NUP, 和 NF, each designed for specific internal configurations and axial displacement capabilities (例如, NU design allows free axial displacement of the shaft).
- Bore Diameter Range: 从 20 mm to over 300 毫米, catering to a vast spectrum of industrial machinery.
- Precision Classes: Available from standard ABEC 1 (P0) 高精度ABEC 5 (P5) for applications requiring exceptional running accuracy and minimum vibration.
- Cage Options: Standard cages include high-strength, precision-stamped steel cages for durability and speed. Machined brass or polymer cages are available for specialized high-speed or corrosive applications.
- 内部游隙: Supplied with standard radial internal clearance (二氧化碳, 中国), with modified clearance groups (C3, C4) available for applications with specific thermal expansion or fit requirements.
产品概述：
Our cylindrical roller bearings represent a cornerstone of power transmission design. They meet rigorous international standards and deliver reliable performance in demanding industrial environments. 而且, they excel in applications where managing substantial radial loads is the primary challenge. 因此, they provide significant advantages over conventional ball bearings under heavy-load conditions.
主要特点
- Exceptional Radial Load Capacity
The large contact area between the rollers and raceways enables these bearings to withstand very high radial loads. 所以, they are ideal for heavy-duty equipment. - 高刚性、高精度
The optimized structure minimizes elastic deformation under load. 因此, it delivers precise shaft guidance and positioning. - Optimized for High Speeds
Low-friction rolling elements and optimized cage designs support stable high-speed operation. 而且, they help reduce heat generation. - Long Life and Durability
We manufacture the bearings from vacuum-degassed SAE 52100 steel. 此外, controlled heat treatment improves wear resistance and fatigue life. - Separable Design for Easy Installation
Most models feature separable components. 最后, installation, removal, and maintenance become faster and easier.
Application Scenarios
- Gearboxes and Drivetrain Systems
For example, cylindrical roller bearings handle high radial forces in automotive, wind turbine, and industrial gearboxes. - Electric Motors and Generators
Likewise, they support the main shafts of large industrial motors and generators, ensuring reliable operation. - Machine Tool Spindles
此外, they provide the rigidity and precision required for machining centers, lathes, and grinding machines. - Material Handling and Construction Equipment
同时, they perform reliably in vibratory screens, conveyor pulleys, and crane wheels where shock loads are common. - Pump and Compressor Shafts
Finally, they ensure stable performance in pumps and compressor shafts, reducing maintenance requirements.
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