Cylindrical Roller Bearing:NF304

Description

Basic Parameters

The cylindrical roller bearing NF304 features basic parameters designed for reliable rotational support in mechanical systems. It has a bore diameter of 20 mm, an outer diameter of 52 mm, and a width of 15 mm, making it suitable for medium-sized applications. The bearing incorporates a set of cylindrical rollers arranged in a single row within the raceways, enabling high radial load capacity while allowing moderate axial displacement. With a dynamic load rating (C) of approximately 23.2 kN and a static load rating (C₀) of around 21.5 kN, it can handle both continuous operational loads and momentary shock loads effectively. The bearing operates at a recommended maximum rotational speed of 10,000 RPM under well-lubricated conditions, and its mass is approximately 0.15 kg, balancing durability with lightweight design. These parameters make the NF304 ideal for applications such as gearboxes, pumps, and conveyors where radial load capability and moderate speed are required.

Product Application

1. Industrial Machinery & Equipment

Gearboxes: In gear transmission systems, the NF304 efficiently carries high radial loads generated by gear meshing forces, ensuring smooth torque transfer. Its single-row cylindrical roller configuration reduces friction while accommodating slight misalignments or axial movements caused by thermal expansion, making it suitable for both parallel-shaft and planetary gearboxes.

Pumps & Compressors: Used in centrifugal pumps and reciprocating compressors, the bearing supports the rotating shafts under radial loads from fluid pressure and mechanical vibrations. Its dynamic load rating (23.2 kN) and static load rating (21.5 kN) enable stable operation in medium-pressure environments, such as water treatment plants, chemical processing units, and air conditioning systems.

Conveyor Systems: In belt or roller conveyors for logistics and manufacturing, the NF304 facilitates low-friction rotation of idler rollers and drive pulleys. Its lightweight design (0.15 kg) and 10,000 RPM maximum speed ensure energy-efficient performance in high-cycle conveying tasks, such as package sorting, food processing, or assembly line transport.

2. Automotive Applications

Wheel Hubs (Non-Driven Axles): On trailers, agricultural vehicles, or light industrial machinery, the bearing supports wheel hubs under radial loads from vehicle weight and road irregularities. Its ability to handle moderate axial displacement allows for slight movements during cornering or terrain changes without compromising stability.

Engine Accessories: Used in engine cooling fans, alternators, or air conditioning compressors, the NF304 withstands radial forces from rotating components while operating in temperature ranges compatible with standard lubricants (typically -20°C to 120°C), ensuring reliability in harsh under-the-hood environments.

3. Energy & Renewable Systems

Wind Turbine Subsystems: In small-scale wind turbines or generator auxiliary systems, the bearing supports low-speed shafts or gearbox intermediate stages, transferring radial loads from blade aerodynamics to the main structure. Its robust load capacity and resistance to occasional shock loads (e.g., during gusts) enhance system durability.

Hydraulic Systems: In hydraulic pumps and motors for construction equipment or industrial presses, the NF304 maintains shaft alignment under fluctuating radial pressures, enabling precise control of fluid power transmission.

4. Key Application Advantages

High Radial Load Capacity: The single-row roller design maximizes contact area with raceways, outperforming ball bearings in heavy-duty radial load scenarios while maintaining compact dimensions.

Axial Displacement Tolerance: Unlike rigid bearings, the NF304 allows limited axial movement (due to non-locating design), making it suitable for applications where thermal expansion or shaft elongation may occur.

Cost-Effective Performance: Balancing load capacity, speed, and durability, the bearing offers an economical solution for mid-range applications that do not require extreme high-speed or heavy-thrust capabilities.

Easy Maintenance: With standard lubrication requirements (grease or oil), the NF304 simplifies maintenance protocols, ideal for systems with periodic servicing schedules.

5. Operational Conditions & Installation Tips

Lubrication: Use high-quality grease (e.g., lithium-based) for normal conditions or oil lubrication for high-temperature/high-speed setups, ensuring re-lubrication intervals align with manufacturer guidelines to maintain the 10,000 RPM speed rating.

Environmental Resistance: While suitable for dusty or moist environments when sealed properly, consider adding protective shields or seals (if not pre-installed) in harsh conditions to prevent contamination and extend service life.

Installation: Ensure precise shaft and housing alignment during installation to avoid excessive stress; use appropriate tools (e.g., bearing pullers, press fits) to maintain dimensional accuracy and prevent damage to raceways or rollers.

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