Large Bore Spherical Roller Bearings for Heavy-Duty Industrial Equipment

Large Bore Spherical Roller Bearings (≥500 mm Bore)

The Large Bore Spherical Roller Bearings are ultra-heavy-duty double-row spherical roller bearings designed for extreme industrial applications with bore diameters of 500 mm and above. Covering major high-load series such as 239, 230, 231, 232, 240, and 241, these bearings are engineered for the most demanding operating conditions in large-scale rotating machinery.

Built for maximum load capacity, structural rigidity, and operational reliability, these bearings combine thick forged rings, optimized roller geometry, and advanced self-aligning capability. They deliver stable performance under extreme radial loads, heavy shock loads, and continuous low-speed operation.

The self-aligning spherical raceway design compensates for significant shaft deflection and installation misalignment, ensuring smooth and reliable operation in oversized industrial equipment.

BY Bearings supplies these large bore series with high-strength machined solid brass cages, including CA, MB, and CAF configurations, ensuring stable lubrication retention and long service life under severe working conditions.

Bearing Series Coverage

This category includes the following large bore spherical roller bearing series:

• 239 Series

• 230 Series

• 231 Series

• 232 Series

• 240 Series

• 241 Series

Each series is optimized for specific load and dimensional requirements, ranging from balanced general heavy-duty performance to extreme ultra-heavy load applications.

Features and Benefits

• Extreme Load-Carrying Capacity

  Designed with reinforced forged rings and extra-long thickened rollers, these bearings provide exceptionally high dynamic and static load ratings suitable for ultra-heavy industrial equipment.

• Superior Structural Rigidity

  High-strength bearing steel construction ensures dimensional stability and prevents deformation under extreme multi-ton load conditions.

• Excellent Self-Aligning Capability

  The spherical raceway allows large angular misalignment compensation, accommodating shaft deflection and installation inaccuracies in oversized rotating systems.

• Optimized for Ultra-Large Machinery

  Engineered specifically for long shafts, large drums, and massive rotary equipment operating under continuous heavy load and low-speed conditions.

• Advanced Lubrication System Compatibility

  W33 lubrication grooves and multiple grease ports support centralized automatic lubrication systems for long-duration operation without shutdown.

• Easy Installation and Maintenance

  K30 tapered bore design enables mounting and dismounting using heavy-duty adapter sleeves, reducing maintenance complexity for oversized machinery.

• High-Temperature Operation Capability

  Optional C4 clearance and specialized heat treatment allow reliable operation in high-temperature environments such as kilns and furnaces.

Typical Applications

Large Bore Spherical Roller Bearings are widely used in ultra-heavy industrial and large-scale equipment, including:

• Super-large cement rotary kilns

• Heavy-duty mining SAG/AG mills

• Metallurgical rolling mills and slab equipment

• Large vertical slag grinding mills

• Rotary kiln and calcining furnace systems

• Port stacker-reclaimer rotary mechanisms

• Marine propulsion and main shaft systems

• Wind power gearbox main shafts

• Heavy industrial transmission systems

Technical Advantages

• Bore sizes ≥ 500 mm for ultra-large machinery

• Double-row spherical roller design with reinforced structure

• Extremely high radial and axial load capacity

• Large self-aligning angle for severe misalignment compensation

• Forged high-strength inner and outer rings

• Extra-long thickened roller geometry for maximum durability

• W33 lubrication system for centralized grease supply

• CA / MB / CAF heavy-duty brass cage options

• K30 tapered bore for efficient installation and removal

• Suitable for continuous ultra-heavy, low-speed operation

The Large Bore Spherical Roller Bearing series represents the ultimate heavy-duty solution for extreme industrial environments requiring maximum load capacity, structural integrity, and long-term operational reliability in the largest rotating machinery systems.