Product Overview: The RN 309 Cylindrical Roller Bearing
The RN 309 is a specialized single-row cylindrical roller bearing designed without an outer ring, featuring key dimensions of 45mm bore diameter, 60mm diameter over rollers, and 25mm width. This unique configuration is engineered for applications where the machine housing bore can be precision-machined to serve as the outer raceway. Part of our comprehensive Cylindrical Roller Bearings collection, the RN 309 allows for exceptionally compact, rigid, and lightweight bearing arrangements. The separable design, consisting of an inner ring with a roller and cage assembly, simplifies both mounting and dismounting processes, making it ideal for integrated machinery designs.
By eliminating the outer ring, this bearing provides a space-saving solution without compromising on performance. It is manufactured to stringent industry standards to ensure high operational accuracy and reliability, capable of accommodating heavy radial loads and high rotational speeds. This makes it a preferred component in demanding industrial environments where space and weight are critical factors.
Key Features of the RN 309 Bearing
- No Outer Ring Design: Enables a compact and rigid bearing arrangement by using the housing bore as the raceway.
- High Radial Load Capacity: The line contact between the cylindrical rollers and raceways provides excellent radial load support.
- Separable Components: The inner ring and roller assembly can be mounted independently of the housing, simplifying installation and maintenance.
- Precision Engineering: Manufactured for high running accuracy, making it suitable for precision applications.
- Hardened and Ground Raceway: The inner ring raceway is precision-machined to ensure smooth operation and long service life.
- Robust Cage Assembly: The cage effectively guides the rollers, reducing friction and heat generation during operation.
Common Applications
- Industrial Gearboxes: Used in planetary gear arrangements where the gear's inner bore can act as the raceway.
- Machine Tool Spindles: Provides rigid and precise support in compact spindle designs.
- Automotive Transmissions: Ideal for specific gear applications requiring high load capacity in a limited space.
- Connecting Rods: Suitable for the big ends of connecting rods in various engines and compressors.
- Printing Machinery: Used in rollers and cylinders where a compact design is essential for performance.
- Pumps and Compressors: Offers a robust and space-saving solution for rotating components.
Benefits of Using the RN 309 Bearing
- Space-Saving Design: The absence of an outer ring significantly reduces the radial space required for the bearing.
- Increased Rigidity: Integrating the raceway into the housing enhances the overall stiffness of the assembly.
- Reduced Weight: Eliminating a component leads to a lighter overall machine design, crucial for mobile or high-speed equipment.
- Cost-Effective Solution: Can reduce the total number of components and simplify the design, potentially lowering manufacturing costs.
- Simplified Assembly: The separable nature allows for easier and more efficient mounting and dismounting procedures.
- Improved Heat Dissipation: Direct contact between the rollers and the housing can improve the transfer of heat away from the bearing.
