Products
Spherical Roller Bearings
Product Overview
Spherical Roller Bearings are heavy-duty rolling bearings designed with barrel-shaped rollers arranged between an outer ring with a spherical raceway and an inner ring with two raceways, typically in a double-row configuration. The spherical outer raceway gives this bearing type its self-aligning capability, allowing it to accommodate shaft misalignment and housing deflection while supporting heavy radial loads and axial loads in both directions.
Spherical Roller Bearings are available in a wide range of standard series, including 213, 222, 223, 230, 231, 232, 239, 240, and 241 series, covering different requirements for load capacity, speed, and mounting space. Common options include cylindrical bore, tapered bore (K type) for use with adapter or withdrawal sleeves, and sealed designs for selected applications.
Depending on operating conditions, these bearings can be supplied with steel, machined brass, or selected polyamide cage designs. They are commonly lubricated with grease or oil and are widely used in heavy-duty applications such as mining equipment, steel mills, cement machinery, paper machines, wind power, and industrial gearboxes.
Technical Specifications
| Series | 213, 222, 223, 230, 231, 232, 240, 241 Series |
| Bore Diameter Range | 20mm – 1250mm |
| Outer Diameter Range | 47mm – 1710mm |
| Width Range | 14mm – 412mm |
| Cage Material Options | Steel stamped, machined brass, polyamide PA66 |
| Bore Options | Cylindrical bore, tapered bore (suffix “K”) for adapter sleeve mounting |
| Precision Grades | P0 standard, P6 high precision |
| Radial Clearance | C0 reduced, CN normal, C3, C4 increased |
| Material Standard | Gcr15 / 52100 chrome steel, case-hardened alloy steel |
| Temperature Range | -30°C to +150°C standard, up to +200°C high temperature |
| Lubrication | Grease standard, oil optional, circulating oil for heavy-load/high-temperature |
| Standards Met | ISO 9001, ISO 15, DIN 635, ANSI/ABMA |
Key Features
- Self-aligning capability – accommodates angular misalignment between shaft and housing (typically 1-2.5 degrees depending on series), reducing sensitivity to installation and deflection errors
- High combined load capacity – double-row roller arrangement supports substantial radial loads together with moderate bidirectional axial loads
- Excellent shock and vibration resistance – line contact between rollers and raceways distributes load over a large contact area, suitable for heavy machinery subject to dynamic loading
- Tapered bore options – facilitates mounting on adapter sleeves for simplified installation on long shafts without precision-ground seats
- Compatible with grease and oil lubrication, including high-temperature and high-load circulating oil systems
- Compliant with international standards, including ISO 15, DIN 635, and ANSI/ABMA
Applications
Spherical Roller Bearings are widely used in heavy industrial machinery, including paper mills, rolling mills, and mining equipment, where shaft misalignment and heavy combined loading are common operating conditions.
In wind turbine main shafts and gearboxes, the series provides the high load capacity and misalignment tolerance required for large rotating structures subject to variable wind loading.
In construction and material handling equipment, such as crushers, conveyors, and vibrating screens, Spherical Roller Bearings deliver reliable performance under heavy shock loading and continuous vibration.
The series is also widely applied in marine propulsion systems, pumps, fans, and gear reducers, wherever a combination of heavy load capacity, self-aligning function, and long service life under demanding conditions is required.
Technical Resources
Whether you are an engineer, procurement manager, or equipment maintenance professional, here you will find in-depth content covering bearing operating principles, technical parameter interpretation, industry application analysis, and selection logic — helping you build a comprehensive understanding of bearing products and make more informed decisions in real-world applications.
FAQs
What loads can deep groove ball bearings handle?
Deep groove ball bearings are primarily designed for radial loads, but they can also handle moderate axial (thrust) loads in both directions. They are not suitable for heavy axial loads or combined shock loads. In those cases, angular contact or tapered roller bearings are preferred.
How do I select the right bearing size for my application?
Selection should be based on bore diameter (shaft size), required load capacity (dynamic rating C and static rating C0), operating speed compared with the bearing limiting speed, available space (outer diameter and width), and required precision grade from P0 to P2. Always apply a safety factor and verify that the calculated L10 service life meets your requirements.
What is the difference between open, shielded (ZZ), and sealed (2RS) bearings?
Open: No built-in protection, requires external sealing, and is suitable for clean environments or oil bath lubrication.
ZZ metal shields: Protect against dust and debris with low friction, making them suitable for high-speed applications, but they are not waterproof.
2RS rubber seals: Provide strong protection against dust and moisture. They are pre-greased and ideal for contaminated environments, but generate slightly more friction.
How often should I lubricate or replace the grease?
For general industrial use, grease should be replenished or replaced every 3,000 to 10,000 operating hours depending on speed, temperature, and environmental conditions. Bearings running above 70 C or in contaminated environments require shorter intervals. Sealed 2RS bearings are pre-greased for life and do not require re-lubrication.
What are the common causes of premature bearing failure?
The most frequent causes include inadequate or improper lubrication, contamination by dirt, dust, or moisture, incorrect installation, misalignment, excessive force during fitting, overloading beyond the rated capacity, improper shaft or housing fits, and fatigue at the end of normal service life.
How is the rated service life (L10) of a bearing calculated?
The basic L10 life is calculated as L10 = (C / P)^3 x 10^6 revolutions, where C is the dynamic load rating in kN and P is the equivalent dynamic bearing load in kN. It represents the number of revolutions that 90% of identical bearings will complete without fatigue failure. In practice, ISO 281 modified life calculations also apply correction factors for lubrication, contamination, material, and reliability.
Get a Fast Response from Our Team
Share your bearing requirements or project details — our team will review your inquiry and respond with the right product recommendations and pricing.
ETERNUM MOTION TECHNOLOGY