Spherical Roller Bearings with CC-Type Cages: Structure, Features, and Performance Advantages
Published on:
2026-01-30 17:15
As the demand for higher load capacities, rotational speeds, and extended service life continues to grow across various industries—such as gearboxes, blowers, paper machinery, metallurgy, shipbuilding, mining, and power generation—the limitations of traditional spherical roller bearings with CA-type cages have become increasingly apparent. Specifically, the structural constraint of the inner ring rib in CA-type bearings restricts the ability to use longer or more rollers within the available space.
To overcome these limitations and enhance bearing performance, the CC-type spherical roller bearing design has been introduced, utilizing advanced foreign technologies. The CC-type features a ribless inner ring and two pressed steel cages per bearing, with a floating center ring replacing the standard middle rib. This design significantly enhances the bearing's load-bearing capacity, speed capability, and overall service life.
Structural Features of CC-Type Cages
1. Pressed Steel Cage Design
The cage is manufactured using precision-pressed steel, which substantially reduces cage weight and rotational inertia. This minimizes interference with roller movement and contributes to higher limiting speeds.
2. Cage Window with Anti-Fallout Locking Points
Rollers are retained using strategically placed locking points in the cage windows. These points are formed with inclined ramps to ensure roller retention and improve cage rigidity. The surface of the cage is treated with phosphating or carbonitriding to further enhance strength and wear resistance.
3. Increased Number and Size of Rollers
The CC-type design allows for the accommodation of more, longer, and larger-diameter rollers, thereby significantly increasing the bearing's dynamic and static load ratings and effectively extending its operational lifespan.
4. High Precision and Improved Flexibility
A single press ramp process at each locking point ensures high manufacturing precision. Bearings equipped with two cages exhibit superior rotation smoothness compared to CA-type equivalents.
Advantages of CC-Type Spherical Roller Bearings
1. Ribless Inner Ring Design
By eliminating the inner ring rib, each row of rollers can be equipped with a pressed steel cage. Locking points in the cage windows secure the rollers, preventing them from falling out during handling and operation.
2. Self-Guiding Roller System
The floating center ring, made from oil-impregnated powder metallurgy, facilitates self-guidance between the rollers and the inner ring raceway. This design improves lubrication and reduces friction.
3. Slope-Enhanced Locking Points
The cage locking points are formed with slopes and are positioned higher relative to the roller center, resulting in a controlled radial clearance that ensures smoother operation and reduced roller wear.
4. Higher Precision and Load Capacity
Due to the ribless inner ring, CC-type bearings are easier to manufacture and assemble to P5 precision class or higher. Each bearing can accommodate 1–2 additional rollers, increasing the rated load by approximately 10% compared to CA-type bearings.
Why Choose CC-Type Spherical Roller Bearings?
The CC-type spherical roller bearing offers a superior solution for high-demand applications where performance, durability, and precision are critical. Its innovative design allows for higher load ratings, smoother operation, and longer service life—making it the ideal choice for industrial applications requiring reliable and efficient rotational performance.
Ready to Upgrade to CC-Type Bearings?
Experience the next generation of spherical roller bearing performance. Contact us today to learn more about our CC-type bearing solutions, request a quote, or speak with a technical expert.
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