213 Series Spherical Roller Bearings

The 213 Series Spherical Roller Bearings are standard medium-size, narrow-section double-row spherical roller bearings designed for general-purpose heavy-duty applications. Featuring a compact cross-sectional structure with a balanced width profile, this series offers an ideal compromise between load-carrying capacity and installation space requirements.

Positioned between lightweight narrow-section bearings and heavy extra-wide series, the 213 series serves as a versatile and widely applicable solution for medium-duty industrial equipment. Its optimized structural design ensures reliable performance under both radial loads and moderate bidirectional axial loads.

The self-aligning spherical raceway enables automatic compensation for shaft misalignment and deflection, maintaining stable rotation accuracy and reducing premature wear during continuous operation.

BY Bearings provides the 213 series with multiple cage configurations, including CC stamped steel cages, E reinforced designs, and CA/MB machined solid brass cages, allowing adaptation to different operating speeds, lubrication conditions, and load requirements.

Bearing Designation Example

21314 CAK/W33

• 213 – Series code

• 2: Double-row spherical roller bearing

• 13: Medium narrow-section standard series

• 14 – Bore code

• Corresponds to a bore diameter of 70 mm

• CA – Machined solid brass cage

• CC – Stamped steel cage (optional variant)

• E – Reinforced roller design for higher load capacity

• K – Tapered bore (1:12 taper) for adapter sleeve mounting

• W33 – Outer ring lubrication groove and oil holes for relubrication

• C3/C4 – Increased internal clearance options for demanding operating conditions

Features and Benefits

• Balanced Load and Compact Structure

  The 213 series offers a medium-width design that balances load capacity and space efficiency, making it suitable for a wide range of general industrial machinery.

• Reliable Self-Aligning Capability

  The spherical raceway design allows automatic compensation for shaft deflection and misalignment, typically up to approximately 0.5°, ensuring stable and smooth operation.

• High Load-Carrying Performance

  Double-row barrel-shaped rollers provide excellent radial load capacity and strong resistance to shock and impact loads, even in harsh working environments.

• Flexible Mounting Options

  Available in both cylindrical bore and tapered bore configurations, the 213 series adapts to various installation and maintenance requirements.

• Efficient Lubrication Design

  W33 lubrication groove and oil hole configurations enable continuous relubrication without equipment shutdown, improving operational efficiency.

• Multiple Cage Configurations

  Options including CC, E, CA, and MB cages allow optimization for different speeds, temperatures, and lubrication conditions.

Typical Applications

The 213 Series Spherical Roller Bearings are widely used in general medium-duty industrial equipment, including:

• Small mining crushers

• Vibrating screen equipment

• Conveyor pulley systems

• Medium and small gear reducers

• Fan main shafts

• Agricultural harvesting machinery

• Woodworking machine tools

• General industrial transmission systems

Technical Advantages

• Double-row spherical roller structure

• Compact medium-width cross-section design

• Strong radial load and moderate axial load capacity

• Self-aligning capability for misalignment compensation

• Available tapered (K) and cylindrical bore options

• W33 lubrication groove for continuous relubrication

• Multiple cage and clearance configurations (CC, E, CA, MB, C3/C4)

• Suitable for medium-duty continuous industrial operation

The 213 Series Spherical Roller Bearings are a reliable and versatile solution for general industrial applications requiring stable performance, compact installation, and long service life under medium-load operating conditions.