FAG 21311 55x120x29 mm Spherical Roller Bearing

Heavy-Duty Spherical Bearing for Industrial Applications

Self-Aligning, High Load Capacity and Long-Life Design

The FAG 21311 is a robust, double-row spherical roller bearing sized 55 mm (bore) x 120 mm (outer diameter) x 29 mm (width). Engineered for demanding industrial environments, it offers excellent radial and axial load support along with a self-aligning outer ring, ensuring stable operation under shaft misalignment, vibration or load fluctuations.

Key Benefits & Applications

• High load capacity — handles heavy radial and axial loads effectively, ideal for heavy machinery, gearboxes, conveyors, crushers and industrial equipment.

• Self-aligning design — spherical outer raceway compensates for shaft deflection or housing misalignment, protecting the bearing from uneven wear.

• Durable under vibration and shock loads — solid roller configuration and high-quality materials ensure reliable performance under dynamic conditions.

• Extended service life and reduced maintenance — precision internal geometry and robust construction lead to long operational intervals.

• Wide industrial use — perfect for conveyors, mills, crushers, processing lines, power transmissions and heavy-duty rotating assemblies.

Detailed Product Description

The FAG 21311 55x120x29 mm spherical roller bearing is designed to excel in heavy-duty industrial settings where load strength, reliability and longevity are critical. Its double-row spherical-roller configuration distributes loads across rollers, enabling stable operation under both radial and axial stress while tolerating high dynamic or shock loading.

The self-aligning spherical outer ring makes the bearing forgiving to installation deviations, shaft misalignment or housing distortions — ensuring consistent operation and reducing premature wear. This feature is particularly valuable for large shafts or long drive systems operating under variable loads or structural stresses.

Built with hardened steel and precision machined components, FAG 21311 resists wear, vibration and mechanical stress, making it well suited for conveyors, crushers, mills, heavy drives, processing equipment and rotating assemblies in mining, construction, manufacturing or materials handling. Its robust design ensures reliability in challenging environments, with minimal maintenance needs.

FAQ

Can FAG 21311 handle both radial and axial loads?
Yes — its spherical roller construction allows it to carry significant radial loads and axial loads in both directions.

Does the bearing compensate for shaft misalignment?
Yes — the self-aligning spherical outer ring adjusts for shaft deflection or mounting irregularities, promoting stable and long-lasting operation.

What types of machinery use this bearing?
Heavy industrial machines, conveyors, crushers, mills, gearboxes, rotating shafts, industrial processing lines, and heavy-duty assemblies where high load capacity and durability are essential.

Is it suitable for environments with vibration or shock loading?
Yes — the robust roller design and high-quality materials provide excellent resistance to dynamic loads, vibration and mechanical stress.

Does it require frequent maintenance?
No — its durable construction and optimized design extend service life and reduce the frequency of maintenance.