Product Overview
This page provides a detailed engineering and procurement reference for the 22252 CA/W33, intended for buyers verifying exact bearing specifications and functional interchangeability before ordering.
As a cornerstone of heavy industrial machinery, the 22252 CA/W33 Spherical Roller Bearing is specifically developed by ZQM Bearings to sustain continuous operation in high-stress environments. Primarily used in primary crushers, vibrating screens, and large-scale conveyor systems, this model is the engineering choice for procurement professionals seeking a reliable replacement that meets rigorous ISO standards for load distribution and fatigue resistance. Its dual-row symmetrical roller design allows for substantial radial capacity while simultaneously managing heavy axial forces in either direction, making it an essential component for critical equipment where downtime is not an option. The precision-machined brass cage ensures that even under severe misalignment or thermal load, the internal clearance remains optimized for operational continuity.
Design & Engineering Advantages
The 22252 CA/W33 is synthesized from premium vacuum-degassed GCr15SiMn bearing steel. This material selection is a critical engineering decision targeting the mitigation of fatigue spalling by controlling the oxygen content to sub-5 ppm levels, effectively reducing non-metallic inclusions. In high-load industrial bearings, steel purity directly correlates to the fatigue limit, and our controlled manufacturing processes ensure that the 22252 CA/W33 maintains superior Hertzian contact stress distribution across the raceways and rollers.
The internal geometry is optimized with a large (D – d) cross-sectional height, which provides the necessary radial depth to absorb heavy impact loads without structural deformation. The 130 mm width (B) further enhances the load footprint, contributing to higher static and dynamic ratings of 3400 kN and 2180 kN respectively. Specifically, the ‘CA’ variant incorporates a solid brass cage and reinforced symmetrical rollers. This structure provides exceptional shock and vibration stability, as the machined brass cage offers superior dimensional stability and heat resistance compared to pressed steel variants. Furthermore, the W33 relubrication feature, with its central lubrication groove and holes, ensures a continuous supply of lubricant to the contact zones, maintaining a stable boundary lubrication layer even at the limiting speed of 850 r/min in oil.
Key Features
- Vacuum-degassed GCr15SiMn steel for maximum fatigue life and purity.
- Machined solid brass cage (CA) for extreme vibration and shock environments.
- Integrated W33 lubrication groove and holes for relubrication continuity.
- Advanced internal geometry to compensate for shaft misalignment up to 2 degrees.
- High-load capacity design for heavy mining and steel production machinery.
Boundary Dimensions
| Designation | 22252 CA/W33 |
| Bore diameter (d) | 260 mm |
| Outside diameter (D) | 480 mm |
| Width (B) | 130 mm |
Procurement Selection
From a TCO (Total Cost of Ownership) perspective, the procurement of the 22252 CA/W33 represents a strategic decision to prioritize operational uptime in high-vibration industrial sectors. Engineering teams should prioritize this brass-cage model for applications where cage fracture due to impact or thermal load is a primary failure risk. The functional interchangeability of the 22252 CA/W33 with international brands ensures that procurement verification is straightforward, matching the Cr=2180 kN dynamic rating required for heavy-duty replacements. By utilizing the 22252 CA/W33, buyers benefit from a design that balances internal clearance optimization with high static load resilience, effectively reducing the frequency of unplanned maintenance intervals in critical infrastructure projects.
Cross-reference & Replacement
| ZQM Model | Reference Brand | Reference Model | Equivalence Basis |
|---|---|---|---|
| 22252 CA/W33 | SKF | 22252 CC/W33 | Dimensional conformity |
| 22252 CA/W33 | FAG | 22252-E1-XL-M | Installation interchangeability |
| 22252 CA/W33 | NSK | 22252CAMKE4 | Internal geometry compatibility |
ZQM Bearings ensures that our 22252 CA/W33 is fully interchangeable with global ISO standards for replacement evaluation. Always verify the shaft abutment (da min=282 mm) and housing abutment (Da max=458 mm) dimensions during engineering選型 to ensure structural integrity and load path continuity.
Typical Industrial Applications
- Primary Jaw and Cone Crushers
- Mining Vibrating Screens and Sizers
- Steel Rolling Mill Drives and Table Rollers
- Large Conveyor Head and Tail Pulleys
- Vertical Raw Mills in Cement Production
Service Life & Reliability
The reliability of the 22252 CA/W33 is grounded in advanced L10 Life Calculation Logic, where the synergy between material purity and roller geometry is maximized. By maintaining sub-5 ppm oxygen levels in the steel, ZQM effectively pushes the fatigue spalling threshold higher, resisting subsurface crack initiation. Heat treatment stability is paramount; our rings are stabilized to prevent dimensional drift under thermal loads, maintaining the friction torque within designed limits. This engineering approach ensures that the bearing maintains its calculated static capacity of 3400 kN throughout its service life, even in environments with boundary lubrication challenges and boundary stress peaks.
Installation & Lubrication Notes
Success in heavy-duty applications depends heavily on precise misalignment compensation. The 22252 CA/W33 can accommodate up to 2 degrees of shaft deflection; exceeding this limit will trigger edge loading and early raceway failure. Relubrication via the W33 feature is mandatory for continuous operation, particularly when approaching the oil speed limit of 850 r/min. Incorrect installation, such as improper heating or excessive shaft interference, will lead to clearance loss and thermal seizure. ZQM engineers recommend auditing the installation environment for vibration stress to protect the solid brass cage integrity.
Frequently Asked Questions
How does material purity influence the fatigue resistance of 22252 CA/W33?
Material purity is the primary determinant of the fatigue life cycle in high-load industrial bearings like the 22252 CA/W33. By using vacuum-degassed steel, ZQM minimizes non-metallic inclusions that act as stress concentration points under the contact subsurface. If inclusions are present, the constant Hertzian contact stress triggers subsurface cracks, leading to premature fatigue spalling. High purity ensures that the 22252 CA/W33 maintains its dimensional stability and achieves its full theoretical L10 life under heavy radial and axial forces.
Why choose a machined brass cage (CA) for the 22252 model in mining?
In mining environments involving heavy vibration and shock loads, a solid brass cage provides superior structural rigidity and heat dissipation compared to pressed steel cages. The CA design in the 22252 CA/W33 reduces friction torque and prevents cage pocket fracture under extreme impact. This ensures that the internal clearance optimization remains stable even when the equipment is subjected to continuous vibration stress, making it the preferred choice for primary crushers and vibrating screens.
What is the importance of the W33 relubrication feature in large bearings?
The W33 feature, consisting of a central lubrication groove and three holes, is vital for relubrication continuity in large spherical roller bearings. It allows fresh lubricant to be introduced directly into the center of the 22252 CA/W33, ensuring the rollers are always protected by a boundary lubrication layer. This is critical for managing the friction torque and heat generated at speeds up to 850 r/min, flushing out contaminants and maintaining operational reliability in harsh industrial zones.
How does the 22252 CA/W33 compensate for shaft misalignment?
The 22252 CA/W33 features a spherical outer raceway and two rows of symmetrical rollers, which allow the inner ring and rollers to rotate freely relative to the outer ring. This self-aligning design can compensate for misalignment or shaft deflection of up to 2 degrees without increasing internal stress. This ensures that the load path remains centered and prevents edge loading, which is the leading cause of premature spalling in rigid industrial bearing designs.
What are the critical abutment dimensions for the 22252 CA/W33 installation?
Proper support is essential for the 22252 CA/W33 to manage its 3400 kN static load capacity. The shaft abutment (da min) must be 282 mm, and the housing abutment (Da max) should not exceed 458 mm. If these dimensions are not met, the bearing’s load path becomes unstable, potentially causing ring fracture or localized stress peaks. The fillet radius (ra max=4 mm) must also be precisely machined to ensure the bearing sits flush against the shoulder, maintaining its axial positioning.
Related Bearing Models
- 22248 CA/W33
- 22256 CA/W33
- 22252 CC/W33
- 22252 CA
- 22352 CA/W33
Technical Support & Global Inquiry
ZQM Bearings supports long-term supply programs for international OEMs and distributors, emphasizing batch-to-batch dimensional consistency and controlled manufacturing processes. Our engineering team ensures that every 22252 CA/W33 meets stringent quality control standards before shipment. Standardized export packaging and anti-rust surface treatment are provided for overseas shipment to maintain the dimensional integrity of your order. ZQM engineers provide 24/7 technical selection support to ensure your 22252 CA/W33 fits your project-specific requirements perfectly. Request a customized quote for bulk orders or project-specific bearing requirements to support your high-performance infrastructure.
