Single Row Cylindrical Roller Bearings Without Inner Ring

Overview of Single Row Cylindrical Roller Bearings Without Inner Ring

Single row cylindrical roller bearings without an inner ring are a space-saving solution engineered for applications where the shaft is both hardened and ground to act as the rolling raceway. By eliminating the inner ring, these bearings reduce component count and overall weight, while still providing high performance under demanding radial loads.

Design and Construction

These bearings consist of:

• Outer Ring: Solid design, with or without flanges, to guide and retain the rollers.
• Rollers: Cylindrical elements that maintain line contact with the shaft and outer ring, providing superior load distribution.
• Cage: Typically made from steel or polymer, ensuring optimal roller spacing and guidance.

Because the shaft itself functions as the inner raceway, it must meet strict surface finish and hardness requirements to ensure bearing longevity and performance.

Key Benefits

• High radial load capacity due to full or semi-full complement roller design.
• Compact design ideal for space-constrained assemblies.
• Cost-effective by eliminating the need for a separate inner ring.
• Enhanced design flexibility in custom engineering applications.

Application Conditions

These bearings are most suitable for:

• Applications with a hardened and ground shaft surface.
• Gearboxes and machine tools requiring precision and space efficiency.
• Electric motors and compressors where internal shaft design can support rolling elements directly.

Maintenance Considerations

When using these bearings, proper attention must be given to shaft hardness (typically ≥58 HRC) and surface roughness (Ra ≤0.2 μm). Inadequate surface preparation may lead to premature bearing wear or failure.

Interchangeability

Corebearing’s Single Row Cylindrical Roller Bearings Without Inner Ring are dimensionally interchangeable with leading international brands such as SKF, ensuring easy integration into existing designs or equipment.

Conclusion

For engineers seeking high-performance radial bearings with a compact footprint and fewer components, Single Row Cylindrical Roller Bearings Without Inner Ring offer a smart and efficient solution. Their ability to run directly on prepared shafts makes them a reliable choice across various high-precision industrial sectors.