Cylindrical Roller Bearings：NJ202

Description

Basic Parameters

The NJ202 cylindrical roller bearing is a single-row radial bearing designed for high radial load capacity and high-speed applications. It features an inner diameter (d) of 15 mm, an outer diameter (D) of 35 mm, and a width (B) of 11 mm. The bearing incorporates a polyamide cage and has a radial internal clearance of C3, allowing for thermal expansion under operating conditions. With a basic dynamic load rating (C) of 12.5 kN and a basic static load rating (C0) of 10.2 kN, it is suitable for heavy-duty industrial machinery such as gearboxes, electric motors, and machine tools. The reference speed is 22,000 rpm, while the limiting speed reaches 26,000 rpm, supported by its low-friction design and high-quality 52100 alloy steel construction. The bearing’s separable design facilitates easy installation and interchangeability of components, while its single inner ring flange enables axial displacement in one direction. Operating within a temperature range of -30°C to +120°C, the NJ202 is ideal for applications requiring reliable performance under moderate axial loads and precise alignment.

Product Application

1. Industrial Machinery

Gearboxes & Transmissions: The NJ202 excels in high-speed gear systems, where it supports shafts and withstands radial forces generated by torque transmission. Its C3 internal clearance accommodates thermal expansion during continuous operation, ensuring stable performance in manufacturing equipment, conveyors, and material handling systems.

Electric Motors: Used in fractional and integral horsepower motors, the bearing’s low-friction design reduces energy consumption while maintaining precise shaft alignment. This extends motor life and minimizes vibration in applications such as pumps, fans, and compressors.

2. Automotive & Transportation

Wheel Hubs (Light-Duty Vehicles): In certain compact car models, the NJ202 may be employed in non-drive wheel hubs, providing radial support for rotational motion while resisting road-induced shocks. Its polyamide cage enhances durability in contaminated environments.

Transmission Components: The bearing’s ability to handle combined radial and axial loads makes it suitable for automotive transmissions, particularly in synchronizer assemblies and intermediate shafts.

3. Machine Tools

Lathes & Milling Machines: NJ202 bearings support spindle shafts in precision machining operations, ensuring accurate cutting and minimal runout. Their high stiffness and load capacity maintain dimensional stability during heavy cutting processes.

Grinding Machines: Used in grinding wheel spindles, the bearing’s cylindrical rollers distribute loads evenly, reducing wear and enhancing surface finish quality. The C3 clearance compensates for heat generated during high-speed grinding.

4. Renewable Energy

Wind Turbines (Auxiliary Systems): In pitch control mechanisms and yaw drives, the NJ202 bearing manages radial loads from blade adjustments and tower rotation. Its corrosion-resistant materials (when specified) ensure reliability in harsh outdoor environments.

Solar Tracking Systems: Supporting rotating shafts in solar panel arrays, the bearing enables smooth azimuth and elevation adjustments, maximizing sunlight capture while enduring thermal cycling and environmental exposure.

5. Agricultural & Construction Equipment

Harvesters & Tractors: The NJ202 is utilized in gearboxes, pumps, and pivot points of agricultural machinery, where it resists contamination from dust and debris. Its robust cage design prevents roller skewing under dynamic loads.

Concrete Mixers & Cranes: In construction equipment, the bearing supports rotating drums and boom sections, providing reliable performance under heavy loads and intermittent operation.

6. Material Handling

Conveyor Rollers: The NJ202’s high-speed capability and low torque requirements make it ideal for conveyor systems in warehouses and distribution centers, reducing energy costs and maintenance downtime.

Palletizers & Robotics: Used in robotic arm joints and lifting mechanisms, the bearing enables precise motion control while supporting payloads, enhancing productivity in automated logistics.

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