Spherical Roller Bearing
ISO 9001 Certified
TS 16949
Genuine SKF
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Spherical Roller Bearing
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.7
Day Prototype
vs. 8-12 wks standard
50+
Countries Served
Global logistics network
12h
Quote Response
Expert engineers on call
Typical Applications
Wind Power
Mining
Steel & Metallurgy
Automotive / EV
Rail Transit
Precision Machinery
Genuine SKF Bearings
NDA Protected
Free Sample for Orders > $50K
Global Shipping
Product Details
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.
Product Summary
- Product Name
- 21304-21308 Spherical Roller Bearings – High Capacity, Low Friction, W33
- Category
- Spherical Roller Bearing
- Brand
- SKF
- Certification
- ISO 9001 · TS 16949
- Lead Time
- 7 Working Days
Get a Custom Quote
Our engineers will respond within 12 hours with a tailored solution.
Request QuoteGeneral Specifications
| Bearing Type | Spherical Roller Bearing |
| Brand | SKF |
| Quality Standard | ISO 9001 / TS 16949 |
| Precision Grade | P0 / P5 / P6 (custom) |
| Material | Chrome Steel / Stainless |
| Cage Material | Steel / Brass / Polyamide |
| Lubrication | Grease / Oil (specify) |
| Operating Temp. | -40°C to +200°C |
| Min. Order Qty | 1 pc (samples available) |
| Prototype Lead Time | 7 Working Days |
Performance Parameters
| Load Capacity | Contact for C0/Cr values |
| Speed Rating | Contact for ndm limit |
| Vibration Level | Z1 / Z2 / Z3 (custom) |
| Noise Level | V1 / V2 / V3 (custom) |
| Fatigue Life | L10h per ISO 281 |
| Sealing Options | Open / Z / 2Z / RS / 2RS |
Custom Specifications Available
Our engineering team can modify bearing dimensions, materials, seals, and clearances to meet your specific operating requirements. Submit your drawing or spec sheet for a tailored proposal.
Wind Power
Main shaft bearings, gearbox bearings, and generator bearings for onshore and offshore wind turbines.
Mining & Quarrying
Heavy-duty bearings for crushers, conveyors, and rotary equipment in extreme dust and shock-load environments.
Steel & Metallurgy
High-temperature bearings for rolling mills, continuous casting, and furnace applications.
Automotive / EV
Wheel hub bearings, transmission bearings, and e-motor bearings for passenger and commercial vehicles.
Rail Transit
Axle box bearings, traction motor bearings, and gearbox bearings meeting EN/UIC railway standards.
Precision Machinery
High-precision spindle bearings, angular contact bearings, and super-precision bearings for CNC and robotics.
Application Design
EngineeringOur engineers analyze your operating conditions -- load, speed, temperature, environment -- and select or design the optimal bearing solution to maximize service life and reduce total cost of ownership.
Custom Modification
7-Day TurnaroundNeed non-standard dimensions, special materials, or modified clearances? We can modify standard SKF bearings or manufacture fully custom solutions with a 7-day prototype turnaround.
Failure Analysis
DiagnosticsWhen bearings fail prematurely, our team conducts root-cause analysis using advanced diagnostic tools to identify the failure mode and recommend corrective action.
Predictive Maintenance
Up to 40% Less DowntimeWe deploy vibration monitoring, thermal imaging, and oil analysis programs that detect bearing deterioration early -- reducing unplanned downtime by up to 40%.
On-site Installation
Global CoverageProper installation is critical to bearing performance. Our certified technicians provide on-site installation support, alignment verification, and operator training worldwide.
Lifecycle Support
Enterprise SLAFrom initial selection through end-of-life, our dedicated account managers provide scheduled maintenance plans, re-lubrication programs, and replacement forecasting for enterprise clients.
Why SKF China
The engineering partner advantage
7 Days
Prototype Lead Time
vs. 8-12 weeks via standard channels
15+
Certified Engineers
SKF-certified, on-call for your project
50+
Countries Delivered
Reliable global logistics network
Request a Quote
Get a custom quote for
21304-21308 Spherical Roller Bearings – High Capacity, Low Friction, W33
NDA protected · Free samples for orders > $50K · Reply within 12 hours
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