Product Overview: The RN 312 Inner Ring
The RN 312 is a high-precision inner ring specifically designed for use with cylindrical roller bearings. With a bore diameter of 60mm, an outer diameter of 78mm, and a thickness of 31mm, this component is essential for applications where the shaft itself cannot be hardened and ground to act as a raceway. The RN 312 provides a durable, precision-ground surface for the rollers to run on, ensuring optimal performance and longevity of the bearing assembly. It is typically paired with a corresponding roller and cage assembly with an outer ring, such as an NU 312 bearing, which lacks an inner ring.
As a key part of our Cylindrical Roller Bearings component range, the RN 312 is manufactured from high-quality bearing steel to withstand heavy radial loads and high-speed operation. Its simple, flangeless design allows for axial displacement of the shaft relative to the housing. Explore our full collection of Inner Rings to find the right component for your machinery.
Features of the RN 312 Inner Ring
- Precision-Ground Raceway: Offers a smooth, hardened surface for rollers, reducing friction and ensuring smooth rotation.
- High-Quality Material: Manufactured from premium bearing steel for exceptional durability and resistance to wear and fatigue.
- Separable Component: Allows for easier mounting and dismounting of the bearing assembly, simplifying installation and maintenance.
- Axial Displacement: The flangeless design accommodates axial movement between the shaft and housing, which is critical in certain applications.
- Standardized Dimensions: Produced to industry-standard specifications for interchangeability and compatibility with corresponding bearing assemblies.
- Cost-Effective Solution: Provides an economical alternative to hardening and grinding the entire shaft.
Common Applications
- Industrial Gearboxes: Used on shafts within gear systems to support roller assemblies and handle heavy loads.
- Machine Tool Spindles: Provides the necessary precision and rigidity for high-speed cutting and grinding operations.
- Pumps and Compressors: Ensures reliable support for rotating shafts in various industrial fluid and gas handling equipment.
- Automotive Transmissions: Applied in transmission systems where shafts require a hardened raceway for needle or cylindrical roller bearings.
- Electric Motors: Used in larger motors where providing a hardened shaft is impractical or not cost-effective.
- Construction Machinery: Supports heavy-duty components in equipment like cranes, excavators, and loaders.
- Rolling Mills: Essential in steel and metal processing where shafts are subjected to extreme loads and temperatures.
Benefits of Using the RN 312 Inner Ring
- Enhanced Bearing Life: Provides an optimal raceway surface, maximizing the service life of the entire bearing assembly.
- Protects Shaft Integrity: Prevents wear and damage to the shaft, reducing the need for costly shaft repairs or replacements.
- Simplified Assembly: The ability to mount the inner ring separately from the outer ring and roller assembly streamlines the installation process.
- Improved Machine Reliability: Ensures consistent and reliable bearing performance, leading to less downtime and increased productivity.
- Versatile Application: Enables the use of high-capacity cylindrical roller bearings on standard, unhardened shafts.
- Reduced Maintenance Costs: By protecting the shaft and extending bearing life, it lowers the overall cost of maintenance and ownership.
