Product Overview
The 22256 CC/W33 is a large-size spherical roller bearing for installations requiring a 280 mm shaft diameter. Its two rows of rollers and spherical outer-ring raceway allow it to carry radial and combined loads while accommodating some shaft deflection or misalignment. Suitability depends on the actual load, speed, lubrication and bearing arrangement.
Design & Engineering Advantages
ZQM Bearings focuses on material quality, careful processing and dimensional consistency. Bearing-steel selection, heat treatment, raceway finishing and inspection are important to dependable bearing quality. For orders with specific material, inspection or documentation requirements, include these in your enquiry so they can be confirmed for the supplied product.
This page covers the steel-cage CC configuration. W33 identifies the outer-ring lubrication groove and holes used to distribute lubricant. These features do not replace a lubrication plan based on operating conditions.
Key Features
- Double-row spherical roller design.
- Steel-cage configuration identified by the complete designation.
- W33 outer-ring groove and lubrication holes.
- Self-aligning capability within the limits of the selected design.
22256 Bearing Dimensions
| Designation | 22256 CC/W33 |
| Bore diameter (d) | 280 mm |
| Outside diameter (D) | 500 mm |
| Width (B) | 130 mm |
The principal dimensions are 280 × 500 × 130 mm, in the order bore, outside diameter and width. Check the complete suffix as well as these dimensions: a tapered-bore version or a different cage configuration requires separate verification.
Procurement Selection
Before ordering, confirm the bore configuration, internal clearance, cage, accuracy requirements and installation arrangement. Load ratings, speed limits, mass and abutment dimensions must be checked against confirmed documentation for the ZQM product supplied. Published reference values and another brand’s catalogue cannot establish the performance of an unverified configuration.
Cross-reference & Replacement
| ZQM Model | Reference Brand | Reference Model | Equivalence Basis |
|---|---|---|---|
| 22256 CC/W33 | SKF | 22256 CC/W33 | Dimensional conformity |
| 22256 CC/W33 | FAG | 22256-E1-XL | Installation interchangeability |
| 22256 CC/W33 | NSK | 22256EAE4 | Internal geometry compatibility |
The cross-reference table is a starting point for checking a replacement. It does not certify identical internal geometry, load capacity or service life. Compare the full designation and drawings, including shaft and housing fits, abutments, corner radii, clearance and axial location, before approving interchangeability.
Typical Industrial Applications
Spherical roller bearings are used in demanding industrial arrangements such as conveyor pulleys, crushers, rolling-mill equipment and cement-processing machinery. Selection for a particular installation, especially vibrating equipment, requires verification of the load spectrum, speed, clearance and cage requirements; the basic number alone is insufficient.
Service Life & Reliability
Material quality and manufacturing consistency matter, together with load, lubrication, contamination control and installation. Basic rating life is a statistical estimate, not a guarantee for every bearing. Use validated load ratings and operating data for life calculations, and check static-load safety separately.
Installation & Lubrication Notes
Check shaft and housing dimensions, abutments, residual clearance and alignment before installation. Do not pass mounting force through the rolling elements. Permissible misalignment depends on the bearing design and operating conditions; there is no universal 2-degree limit for every spherical roller bearing.
Select the lubricant, quantity and relubrication interval for the operating load, speed, temperature and contamination level. Catalogue speed values are not relubrication intervals or an automatic safe operating limit for the equipment.
Frequently Asked Questions
What are the 22256 bearing dimensions?
The principal dimensions of the 22256 CC/W33 are 280 mm bore, 500 mm outside diameter and 130 mm width. Confirm the complete designation and drawing before ordering.
What does CC/W33 mean?
In the configuration offered here, CC identifies the steel-cage design and W33 identifies the outer-ring lubrication groove and holes. These suffixes do not specify the required internal clearance or accuracy class.
Can it replace another brand’s 22256 bearing?
Possibly, after checking the complete specification. Matching boundary dimensions does not prove identical cage construction, clearance, load rating or installation details. Send the existing bearing markings and drawing for review.
How should internal clearance be selected?
Consider the fits, temperature difference between the rings and operating conditions. A larger bearing does not automatically require C3 clearance. Confirm the required clearance class rather than inferring it from CC/W33.
What should I include in a quotation request?
Provide the complete designation, quantity, required clearance, delivery destination and any drawing, material or inspection requirements. Include photographs of the existing markings when the specification is uncertain.
Related Bearing Models
Browse the spherical roller bearing range to compare listed models and sizes. Related models are selection references, not automatic substitutes.
Technical Support & Global Inquiry
For 22256 CC/W33 bearing supply, discuss your specifications, quantity and quality-documentation requirements with ZQM Bearings. Request a quotation to confirm the configuration, packaging and commercial terms for your order.
