Overview
The SKF 22228 CCK/C3W33 is a premium tapered-bore spherical roller bearing engineered for high-capacity load applications. This double-row bearing features self-aligning spherical rollers and an open design with steel cage, making it ideal for machinery operating under misalignment or shaft deflection. SKF’s proven bearing technology delivers extended service life and low maintenance in industrial automation, heavy machinery, and power transmission systems.
Key Features
- Double-row spherical rollers — Enhanced load capacity and stability with self-aligning capability
- Tapered 1:12 bore — Enables direct mounting on tapered spindles and shafts
- Steel cage construction — Robust stamped sheet-steel cage with guide ring for low friction and self-guiding operation
- C3 radial clearance — Greater-than-normal internal clearance accommodates misalignment and thermal expansion
- Lubrication groove and holes — Annular groove in outer ring with three lubrication points for effective grease distribution
- Open design — No seals; optimal for applications requiring direct access to roller surface
Technical Specifications
- Bore diameter (ID): 140 mm (5.51 inches)
- Outer diameter (OD): 250 mm (9.84 inches)
- Width (W): 68 mm (2.68 inches)
- Bore type: Tapered 1:12 ratio
- Dynamic load capacity (C): 743 kN (167,033 lbf)
- Static load capacity (Câ‚€): 900 kN (202,328 lbf)
- Maximum speed: 3,200 rpm
- Internal clearance: C3 (increased)
- Rows: 2 (double-row design)
- Cage material: Sheet steel with window design
- Operating temperature: −20 to +200 °C (−4 to +390 °F)
- Weight: Approximately 14 kg
- Closure type: Open (unsealed)
- Fillet radius: 2.5 mm
- Series: 222 (200 series)
Typical Applications
The SKF 22228 CCK/C3W33 is engineered for heavy-duty environments including:
- Mining and crushing equipment — Robust construction handles extreme radial and axial loads with misalignment
- Continuous casters and rolling mills — High-speed, high-load power transmission
- Industrial gearboxes and speed reducers — Reliable support for shaft rotation under dynamic loads
- Vibratory and compaction machinery — Self-aligning design absorbs shock and misalignment
- Wind turbine main shafts — SKF’s proven design for extreme load and environmental conditions
- Material handling and conveyor systems — Extended bearing life in continuous-duty applications
Compatibility & Replacements
Compatible With
- Standard tapered spindle and shaft housings with 1:12 taper ratio
- Shaft diameters up to approximately 140 mm bore fitting
- Industrial machinery using grease or oil lubrication systems
- Standard bearing housings and pillow blocks rated for 250 mm OD flanges
Replaces / Drop-In Replacement For
- SKF 22228 CC/C3W33 (straight bore equivalent in same series)
- Other OEM spherical roller bearings 140×250×68 with equivalent load ratings
Works With
- Grease lubrication systems (relubrication via external lubrication points)
- Oil bath and circulating oil lubrication methods
- Standard bearing installation and removal tools
- Tapered bore extraction sleeves and shaft adapters
