Product Overview: The 21321 Spherical Roller Bearing
The 21321 Spherical Roller Bearing is a high-capacity component engineered to excel in the most demanding industrial environments. With principal dimensions of 105mm Bore Diameter, 225mm Outer Diameter, and 73mm Thickness, this bearing is part of our robust 21300 Series. As a premier example of Spherical Roller Bearings, its design features two rows of symmetrical barrel-shaped rollers that rotate within a common spherical outer raceway. This geometry allows the bearing to tolerate significant angular misalignment between the shaft and housing, making it indispensable for applications where shaft deflection or mounting errors are a concern.
Built to handle a combination of heavy radial and axial loads in both directions, the 21321 is a cornerstone of reliability in heavy machinery. Its internal design minimizes friction and heat generation, ensuring a long and efficient service life even under severe operational stress. We are committed to supplying top-tier mechanical parts, and our 21321 bearing is manufactured to stringent industry standards for consistent performance.
Key Features of the 21321 Bearing
- Superior Load Capacity: Designed with two rows of rollers to support very high radial and substantial axial loads.
- Self-Aligning Capability: The spherical outer raceway compensates for dynamic and static misalignment, reducing stress on the shaft and extending machine life.
- Robust Construction: Manufactured from high-purity, hardened bearing steel for exceptional durability and resistance to wear and fatigue.
- Optimized Internal Design: Engineered for low friction, which allows for cooler operation and higher rotational speeds compared to other roller bearing types.
- Dimensional Stability: Precision-engineered to maintain its shape and performance under heavy loads and high temperatures.
- Accommodates Tapered Shafts: Often available with a tapered bore (K designation) for secure mounting with adapter or withdrawal sleeves.
Common Applications of 21321 Bearings
- Mining and Construction: Ideal for crushers, vibrating screens, conveyor systems, and heavy-duty gearboxes.
- Pulp and Paper Industry: Used in calendars, press sections, and other machinery where heavy loads and misalignment are common.
- Steel Manufacturing: Essential for continuous casting machines, rolling mills, and material handling equipment.
- Wind Turbines: Provides reliable support for main shafts and gearboxes, withstanding fluctuating loads and environmental stresses.
- Industrial Fans and Blowers: Ensures smooth operation in large-scale ventilation systems where shaft deflection can occur.
- Marine and Offshore: Employed in propulsion systems, winches, and cranes that operate in harsh conditions.
- Power Generation: Supports rotating components in turbines, generators, and large industrial pumps.
Benefits of Using the 21321 Bearing
- Enhanced Machine Reliability: Its ability to handle misalignment and heavy loads prevents premature failures and costly downtime.
- Extended Service Life: The durable materials and low-friction design contribute to a longer operational lifespan for both the bearing and the equipment.
- Reduced Maintenance Costs: High reliability means less frequent inspection and replacement, lowering overall maintenance expenditure.
- Versatile Performance: Suitable for a wide array of heavy-duty applications across multiple industries.
- Improved Operational Efficiency: Minimizes energy loss through friction, contributing to more efficient and sustainable machinery operation.
