Product Overview: The NA 4904 Needle Roller Bearing
The NA 4904 is a high-performance machined ring needle roller bearing, an essential component from our NA Series. With key dimensions of 20x37x17mm (Bore x Outer Diameter x Thickness), this bearing is specifically engineered for applications requiring high radial load capacity within a very compact space. It features a precision-machined outer ring and a full complement of needle rollers, guided by a cage for optimal performance at high speeds. Crucially, the NA 4904 comes complete with a hardened and ground inner ring, making it suitable for direct mounting on shafts that have not been hardened, providing a cost-effective and versatile solution for demanding industrial environments. Explore our full range of Needle Roller Bearings to find the perfect fit for your machinery.
Key Features of the NA 4904 Bearing
- High Radial Load Capacity: Its design with multiple needle rollers allows it to support heavy radial loads despite its small cross-section.
- Compact and Lightweight: Ideal for applications where space and weight are critical design factors.
- Includes Inner Ring: Comes with a precision inner ring, allowing its use on standard shafts without the need for special heat treatment or grinding.
- Cage-Guided Rollers: The cage ensures uniform roller spacing, reduces friction, and retains lubricant, enabling higher speed capabilities.
- Machined Outer Ring: Provides superior rigidity and strength compared to drawn cup designs, ensuring dimensional stability under heavy loads.
- Durable Construction: Manufactured from high-quality bearing steel for excellent fatigue resistance and extended operational life.
Common Applications of NA 4904 Bearings
- Automotive Transmissions: Used in gear sets and shafts where space is limited but load requirements are high.
- Industrial Gearboxes: Provides robust support for gears and shafts in various industrial reduction units.
- Power Tools: Commonly found in high-speed drills, saws, and grinders to support rotating components.
- Two-Stroke Engines: Utilized for connecting rods and piston pins due to their high load capacity and compact size.
- Pumps and Compressors: Ensures reliable operation of rotating assemblies in fluid and air handling equipment.
- Textile and Printing Machinery: Supports rollers and shafts requiring precise and stable rotation.
- Agricultural Equipment: Suitable for use in harvesters, balers, and other machinery operating under demanding conditions.
Benefits of Using the NA 4904 Bearing
- Enhanced Design Flexibility: The compact size allows for smaller and more lightweight machine designs.
- Reduced Costs: The included inner ring eliminates the need for expensive shaft hardening and finishing processes.
- Improved Machine Performance: Low friction and high rigidity contribute to smoother operation and greater precision.
- Increased Reliability: The robust construction minimizes the risk of premature failure, reducing downtime and maintenance.
- High-Speed Operation: The caged roller design is well-suited for applications involving high rotational speeds.
- Versatile Mounting: Can be easily integrated into a wide variety of industrial and automotive applications.
