SKF 6203-2Z/C3
6203-2Z/C3 is a SKF Explorer single row deep groove ball bearing fitted with non-contact steel shields on both sides (2Z) and C3 enlarged radial internal clearance.
Suffix Definition (SKF Standard Marking)
6203: Light series metric deep groove ball bearing
2Z: Non-contact pressed steel shields mounted on both bearing sides
C3: Radial internal clearance larger than standard CN clearance, for applications with tight shaft/housing fit, high temperature expansion or heavy operating loads
2. Core Dimension Parameters (SKF Official Datasheet)
| Parameter Item | Symbol | Value |
|---|---|---|
| Bore (Inner Diameter) | d | 17 mm |
| Outer Diameter | D | 40 mm |
| Bearing Width | B | 12 mm |
| Minimum Chamfer Radius | r₁,₂ min | 0.6 mm |
| Approx. Inner Ring Shoulder Diameter | d₁ | 24.5 mm |
| Approx. Outer Ring Shoulder Diameter | D₂ | 34.98 mm |
| Net Weight | m | 0.068 kg |
Mounting Abutment Dimensions
Min shaft shoulder diameter dₐ min: 21.2 mm
Max shaft shoulder diameter dₐ max: 24.4 mm
Max housing shoulder diameter Dₐ max: 35.8 mm
Max allowable fillet radius rₐ max: 0.6 mm
3. Load & Speed Performance Data (SKF Official Test Data)
| Performance Index | Value |
|---|---|
| Basic Dynamic Load Rating (C) | 9.95 kN |
| Basic Static Load Rating (C₀) | 4.75 kN |
| Fatigue Load Limit (Pᵤ) | 0.2 kN |
| Reference Speed (Grease Lubrication) | 38 000 r/min |
| Limiting Operating Speed | 19 000 r/min |
| Minimum Radial Load Factor kᵣ | 0.025 |
| Calculation Factor f₀ | 13 |
4. Structural & Material Specifications (SKF Official Standard)
Bearing Material: High-carbon chromium bearing steel (through-hardened rings & balls)
Cage: Stamped sheet steel cage, centered on rolling elements
Sealing System: Double-sided non-contact pressed steel shields (2Z), no re-lubrication port
Internal Clearance Class: C3 (greater radial clearance than normal CN)
Tolerance Grade: ISO P0 / ABEC 1 standard precision
Standard Grease Fill: Factory pre-lubricated with SKF multipurpose bearing grease
Operating Temperature Range: -30 ℃ ~ +120 ℃
Surface Coating: No extra surface coating
Compliance: RoHS & REACH compliant
5. Key Advantages (From SKF Official Product Introduction)
Double-sided non-contact steel shields effectively prevent grease leakage and pollutant ingress, extending bearing service life
Low friction torque design reduces heat generation and energy consumption under high-speed operation
C3 enlarged clearance compensates thermal expansion in high-temperature running conditions and accommodates interference fits
Capable of supporting pure radial load, bidirectional light axial load and combined radial-axial loads
Robust universal structure, wide compatibility with general industrial equipment
Pre-greased sealed construction requires no supplementary lubrication during whole service cycle under normal working conditions
6. Typical Applications
Electric motors, garden machinery, power tools, conveyor rollers, textile equipment, agricultural machinery, small gearboxes, fans and blowers, general mechanical transmission assemblies with medium-high speed and dusty working environments.
