21304-21308 Spherical Roller Bearings – High Capacity, Low Friction, W33
Basic Info
| Inner Diameter | 100 mm |
| Outer Diameter | 215 mm |
| Width | 47 mm |
Introduction
Double-row spherical roller bearing with high precision (P0–P2), radial load capacity, and self-aligning capability. Made of premium bearing steel, suitable for OEM/ODM applications. Features standard clearance (C0/C3/C4), unseparated design, and robust carton-pallet packaging. Widely used in heavy-duty industrial machinery.
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Warranty 1 year
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Description
Why Choose Our 21308 CC CA W33 Spherical Roller Bearings?
| Description | Key Value |
|---|---|
| Super High Load Capacity | Optimized roller geometry & high-grade bearing steel handle extreme radial & moderate axial loads |
| High Rigidity & Low Friction | CC cage + CA internal design ensures precise alignment and minimal heat generation |
| Robust Alignment Tolerance | Spherical outer ring enables ±1.5° misalignment compensation — ideal for heavy-duty machinery |
| W33 Lubrication Feature | Outer ring with lubrication grooves & holes ensures consistent grease distribution and extended service life |
| Precision Options | Available in P0, P6, P5, P4, P2 grades — meets strict OEM/ODM tolerance requirements |
| Clearance Flexibility | C0 (standard), C3 (increased), C4 (extra-wide) options for thermal expansion or preload needs |
| Proven Applications | Mining equipment, wind turbines, gearboxes, crushers, paper mills, and steel rolling mills |
| Quality Assurance | ISO 9001-certified production; 100% dimensional & noise testing; compliant with SKF/NTN/NSK standards |
| Competitive Edge | Chinese OEM excellence at 30–40% lower cost vs. premium brands — zero compromise on material (GCr15) or fatigue life |
| FAQ: Is this compatible with SKF mounting systems? | Yes — identical dimensions (100×215×47 mm), load ratings, and interchange codes per ISO 281 |
Ready to optimize uptime and reduce maintenance costs? Contact us now for a technical datasheet, sample quote, or custom ODM support.
