233 Series Spherical Roller Bearings

The 233 Series Spherical Roller Bearings are extra-wide, heavy-duty double-row spherical roller bearings designed for extreme load conditions. Featuring the broadest internal roller arrangement among standard medium- to large-bore spherical roller bearing series, the 233 series delivers exceptional load-carrying capacity and superior impact resistance.

With an extended roller length and enlarged contact surface, this series significantly improves both dynamic and static load ratings, making it ideal for severe working environments involving heavy shock loads and low-to-medium rotational speeds. The robust structure ensures stable performance even under continuous heavy-duty operation.

The spherical self-aligning design compensates for shaft deflection and installation misalignment, ensuring reliable operation in large-scale rotating equipment with long service cycles.

BY Bearings offers the 233 series in multiple cage configurations, including CC stamped steel cages, E optimized internal geometry designs, and CA/MB machined solid brass cages, ensuring stable lubrication retention and adaptability to harsh operating environments.

Bearing Designation Example

23356 CA/W33

• 233 – Series code

• 2: Double-row spherical roller bearing

• 33: Extra-wide heavy-duty large-bore series

• 56 – Bore code

• Corresponds to a bore diameter of 280 mm

• CA – Reinforced machined solid brass cage

• W33 – Outer ring circumferential lubrication groove for centralized lubrication systems

• C4 – Extra-large internal clearance for high-temperature and heavy-load applications

Features and Benefits

• Ultra-High Load-Carrying Capacity

  The extra-wide roller design provides significantly higher radial and axial load capacity compared with 230, 231, and 232 series bearings, making it suitable for extreme-duty applications.

• Exceptional Shock and Vibration Resistance

  The reinforced internal structure is optimized to withstand severe impact loads and continuous vibration, ensuring stable performance in harsh industrial environments.

• Extra-Wide Roller Geometry

  The extended roller contact surface increases load distribution efficiency, reducing localized stress and improving overall bearing durability.

• Reliable Self-Aligning Performance

  The spherical raceway allows compensation for shaft misalignment and deflection, maintaining stable operation in large rotating equipment with structural deformation.

• Continuous Lubrication Compatibility

  The W33 lubrication groove supports centralized automatic lubrication systems, ensuring consistent lubrication during long-term continuous operation.

• Multiple Cage Options

  Available with CC, E, CA, and MB cage types to accommodate different speed ranges, load conditions, and lubrication requirements.

Typical Applications

The 233 Series Spherical Roller Bearings are widely used in ultra-heavy industrial equipment, including:

• Large vertical roller mills

• Heavy-duty mining ball mills

• Metallurgical plate rolling mills

• Large calcining rotary kilns

• Ultra-heavy ore crushers

• Industrial heavy-duty vibrating machinery

• Bulk material processing systems

• Large mixing and agitation equipment

Technical Advantages

• Extra-wide double-row roller structure for maximum load capacity

• Superior radial and axial load performance under extreme conditions

• High resistance to impact, vibration, and shock loads

• Stable self-aligning capability for large-scale misalignment compensation

• W33 lubrication groove for continuous lubrication systems

• C4 clearance option for high-temperature operation

• Multiple cage configurations (CC, E, CA, MB)

• Designed for ultra-heavy, low-speed industrial applications

The 233 Series Spherical Roller Bearings are engineered for extreme heavy-load applications requiring maximum strength, high reliability, and long service life under the most demanding industrial conditions.