SKF 6208/C3
6208/C3 belongs to SKF Explorer single row open-type deep groove ball bearing with C3 enlarged radial internal clearance.
SKF 6208/C3 Single Row Deep Groove Ball Bearing
Official Product Introduction
6208/C3 belongs to SKF Explorer single row open-type deep groove ball bearing with C3 enlarged radial internal clearance. Deep groove ball bearings are the most versatile rolling bearing type, featuring ultra-low friction, optimized low noise and vibration design to support high rotational speeds. This bearing can withstand pure radial loads and bidirectional light-to-medium axial loads simultaneously. Its non-separable structure enables easy installation and disassembly, with far less maintenance demand compared to other bearing types.
Suffix Explanation (SKF Standard Coding Rule)
6208: Metric light series single row deep groove ball bearing, open construction without shields/seals
C3: Radial internal clearance larger than standard CN normal clearance, designed for high operating temperature, heavy interference fit or high load working conditions
1. Core Dimension Parameters (SKF Official Datasheet)
| Parameter Item | Symbol | Official Value |
|---|---|---|
| Inner bore diameter | d | 40 mm |
| Outer diameter | D | 80 mm |
| Bearing width | B | 18 mm |
| Minimum fillet radius | r min | 1.1 mm |
| Net mass | m | 0.37 kg |
Mounting Shoulder Limit Dimensions
Min shaft shoulder diameter dₐ min: 48 mm
Max shaft shoulder diameter dₐ max: 52 mm
Max housing shoulder diameter Dₐ max: 72 mm
Maximum allowable shaft/housing fillet radius rₐ max: 1 mm
2. Load & Speed Performance Data (SKF Certified Test Values)
| Performance Index | Official Parameter |
|---|---|
| Basic dynamic load rating (C) | 32.5 kN |
| Basic static load rating (C₀) | 19 kN |
| Fatigue load limit (Pᵤ) | 0.80 kN |
| Reference speed (grease lubrication) | 18 000 r/min |
| Limiting operating speed | 11 000 r/min |
| Minimum radial load factor kᵣ | 0.025 |
| Calculation coefficient f₀ | 13.2 |
3. Structural & Material Technical Specifications
Product Grade: SKF Explorer high-performance standard bearing
Row Quantity: Single row, no filling slots
Bore Style: Smooth cylindrical straight bore
Cage: Stamped sheet steel cage, ball-centered design
Sealing Form: Open type, without metal shields or rubber contact seals
Radial Clearance Class: C3 (greater clearance than CN standard group)
Precision Tolerance Grade: ISO P0 / ABEC 1 general industrial precision
Raw Material: Through-hardened high-carbon chromium bearing steel for rings and rolling elements
Surface Coating: No extra anti-corrosion coating
Relubrication Port: Without relubrication groove or hole
Outer Ring Locating Groove: None
Compliance: RoHS & REACH environmental compliant
Operating Temperature Range: -30 ℃ ~ +120 ℃
4. Core Advantages (SKF Official Product Features)
C3 oversized clearance compensates thermal expansion under continuous high-temperature operation and accommodates tight interference fits between shaft and housing
Open design supports circulating oil lubrication, suitable for heavy-load, high-speed equipment with centralized oil supply systems
Low-friction raceway geometry cuts operating heat loss and reduces energy consumption during long-time rotation
Balanced load capacity for combined radial and two-way axial loads, wide universal adaptability
Robust one-piece inner/outer ring structure, stable running with low vibration and noise
Simple disassembly and installation, compatible with standard bearing housings and shaft configurations
5. Typical Industrial Applications
Electric motor rotors, industrial fans, water pumps, gear reducers, conveyor equipment, textile machinery, agricultural machines, machine tool auxiliary shafts, construction power tools, general transmission assemblies with oil lubrication and high-temperature running environment.
