Bearing RNA 4903 SKF



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Product detailed description
Bearing RNA 4903 SKF: Precision and Durability for Your Applications
The RNA 4903 SKF is a high-quality needle roller bearing designed to provide exceptional performance in demanding mechanical environments. Manufactured by SKF, a global leader in bearing technology, this bearing ensures reliable operation, reduced friction, and extended service life for a wide range of industrial applications.
Constructed with precision-engineered needle rollers and a robust outer ring, the RNA 4903 SKF is ideal for applications requiring compact design and high load-carrying capacity. Its needle roller design allows for a slim cross-section while maintaining strength and durability, making it suitable for automotive, agricultural machinery, and various industrial equipment.
Key Features and Benefits
- High Load Capacity: The needle roller configuration distributes loads evenly, enabling the bearing to handle heavy radial forces efficiently.
- Compact Design: Its slim profile saves space without compromising performance, making it perfect for tight installation spaces.
- Durability: Manufactured with SKF’s high-quality materials and advanced production techniques, ensuring long service life and resistance to wear.
- Low Friction: Optimized roller geometry reduces friction and heat generation, contributing to energy savings and smoother operation.
- Versatility: Suitable for various applications including gearboxes, transmissions, and machine tool spindles.
Technical Specifications
The RNA 4903 SKF is a needle roller bearing without an inner ring, designed primarily for use directly on hardened shafts. As per SKF’s standard bearing nomenclature, RNA 4903 typically has the following dimensions:
- Inner Diameter (d): 17 mm
- Outer Diameter (D): 30 mm
- Width (B): 19 mm
Please note that these dimensions are standard for the RNA 4903 bearing type, ensuring compatibility with a wide range of machinery components.
Why Choose RNA 4903 SKF?
SKF’s commitment to quality and innovation makes the RNA 4903 SKF a trusted choice for engineers and maintenance professionals worldwide. Whether upgrading existing equipment or designing new systems, this bearing offers reliability and performance that meets rigorous industry standards.
Invest in the RNA 4903 SKF to enhance your machinery’s efficiency, reduce downtime, and achieve optimal operational results.

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SKF: Leading Manufacturer of Bearings and Transmission Technology
Company Overview
SKF is a globally recognized manufacturer specializing in high-quality bearings and transmission technology. Founded in 1907 in Gothenburg, Sweden, SKF has established itself as a pioneer in the development of innovative solutions for rotating equipment and industrial applications. With over a century of expertise, SKF continuously drives advancements in reliability, efficiency, and sustainability in its product offerings.
History and Heritage
SKF was founded by Sven Wingquist, who invented the self-aligning ball bearing, revolutionizing the bearing industry. The company quickly expanded from its Swedish roots to become a global leader in bearing technology and related services. SKF’s long-standing tradition of innovation is reflected in its commitment to research and development, ensuring cutting-edge products that meet evolving industrial needs.
Product Range
SKF offers an extensive selection of products designed to optimize machine performance and lifespan. Their product portfolio includes:
- Ball Bearings: Standard, high-precision, and special designs for various applications.
- Roller Bearings: Cylindrical, spherical, and tapered roller bearings engineered for heavy-load conditions.
- Bearing Units and Housings: Solutions designed for easy installation and enhanced reliability.
- Seals and Lubrication Systems: Critical components that protect and extend the operational life of bearings.
- Transmission Components: Including belts, couplings, clutches, and gearboxes.
- Condition Monitoring and Maintenance Services: Tools and technologies such as SKF @ptitude and SKF Enlight for predictive maintenance.
Main Focus and Technological Innovations
SKF’s main focus is delivering high-performance, durable, and energy-efficient solutions that reduce downtime and operational costs for customers worldwide. The company integrates digital technology with traditional mechanical engineering to support Industry 4.0 initiatives. SKF’s innovations include smart bearings equipped with sensors for real-time condition monitoring, advanced lubrication technologies, and bespoke solutions tailored to specific industry challenges.
Application Areas
SKF’s products and services are critical components across a broad spectrum of industries, including:
- Automotive and Transportation
- Aerospace and Defense
- Industrial Manufacturing and Machinery
- Energy Production (Wind, Hydro, and Thermal)
- Mining and Construction Equipment
- Food and Beverage Processing
- Railway and Marine Applications
Company Headquarters
The global headquarters of SKF is located in Gothenburg, Sweden. From this central location, SKF operates through a vast network of manufacturing facilities, sales offices, and technical centers worldwide, serving customers in more than 130 countries.
Conclusion
With its rich heritage, comprehensive product range, and commitment to innovation, SKF remains a trusted partner for industries seeking reliable and advanced bearing and transmission technology solutions to improve performance and sustainability.