Product Overview: The NA 4903 Needle Roller Bearing
The NA 4903 is a high-precision machined ring needle roller bearing with an inner ring, featuring compact dimensions of 17x30x13mm. As part of our extensive NA Series of Needle Roller Bearings, this component is engineered to handle high radial loads within a minimal space envelope. Its design, which includes both a machined outer ring and a separate inner ring, makes it exceptionally versatile for applications where the shaft cannot be hardened and ground to serve as a raceway. This bearing is an excellent solution for compact and rigid arrangements in a wide variety of industrial machinery.
Our commitment to quality ensures that the NA 4903 meets stringent industry standards, providing reliable performance and a long service life. Its cage-guided rollers minimize friction and heat generation, allowing for higher operational speeds compared to full complement designs. For robust performance in demanding conditions, explore our complete range of machined ring bearings.
Key Features of the NA 4903 Bearing
- High Radial Load Capacity: The needle rollers provide a large contact area, enabling the bearing to support heavy radial loads.
- Compact and Rigid Design: Features a low cross-sectional height, making it ideal for space-constrained applications requiring high rigidity.
- Includes Inner Ring: Allows for use on standard shafts that are not hardened, increasing its application versatility.
- Machined Outer Ring: The solid, channel-shaped outer ring provides robustness and is suitable for high-speed rotation.
- Cage for Roller Guidance: The cage accurately guides the needle rollers, ensuring smooth operation, reducing friction, and preventing roller skewing.
- Precision Engineered: Manufactured to precise tolerances for optimal performance and interchangeability.
Common Applications
- Industrial Gearboxes: Provides robust support for gears and shafts in compact transmission systems.
- Automotive Systems: Used in transmissions, engines, and steering components where space and load capacity are critical.
- Power Tools: Essential for the reliable operation of drills, saws, and other high-speed handheld equipment.
- Pumps and Compressors: Supports rotating shafts, ensuring efficiency and durability under continuous operation.
- Two-Stroke Engines: Commonly used for connecting rods and crankshafts due to its high performance in oscillating conditions.
- Printing and Textile Machinery: Ensures precise and smooth movement of rollers and other critical components.
Benefits of Using the NA 4903 Bearing
- Space-Saving: Its minimal radial footprint allows for more compact and lightweight machine designs.
- Enhanced Durability: The high-quality steel and robust construction ensure a long operational life, even under heavy loads.
- Improved Machine Performance: Low friction and high rigidity contribute to greater efficiency and precision in machinery.
- Versatile Installation: The presence of an inner ring simplifies design and assembly, as it eliminates the need for specialized shaft preparation.
- Reduced Maintenance: Reliable performance and long service life lead to less downtime and lower maintenance costs.
- High-Speed Capability: The cage-guided design is suitable for applications involving high rotational speeds.
