KGI 62206 2RS C3 Deep Groove Ball Bearing
The KGI 62206 2RS C3 is a strategic model in the KGI Wide Series deep groove ball bearing family. With a 30mm bore and a 62mm outside diameter, it features an exceptional 20mm width. This design provides 4mm of additional axial space compared to the standard 6206 series (which has a 16mm width).
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Product Detail
Wide Series Deep Groove Ball Bearing KGI 62206 2RS C3 20mm Extended Width | C3 Thermal Clearance | 2RS Rubber Seals | 30mm Shaft Diameter
Engineered with an extra-large grease reservoir and high axial rigidity for industrial alternators, agricultural machinery, heavy-duty rollers, and idler pulleys.
Technical Overview: KGI 62206 2RS C3
The KGI 62206 2RS C3 is a strategic model in the KGI Wide Series deep groove ball bearing family. With a 30mm bore and a 62mm outside diameter, it features an exceptional 20mm width. This design provides 4mm of additional axial space compared to the standard 6206 series (which has a 16mm width).
This additional width offers two engineering advantages: first, it significantly increases the internal volume for high-grade industrial lithium grease, making it virtually maintenance-free for extended service intervals. Second, the combination of C3 radial clearance and 2RS contact rubber seals makes this bearing highly resistant to thermal expansion and environmental contamination.
Anatomy & Part Number Decoding: KGI 62206-2RS-C3
Prefix 622: Indicates the "Wide Series" deep groove ball bearing category, per DIN 625-1 / ISO 15 standards.
Number 06 (Shaft Size): Standard bore coefficient; multiplying 06 by 5 results in an exact 30mm bore diameter.
Suffix 2RS: Equipped with two reinforced NBR rubber contact seals, preventing lubricant leakage and the ingress of dust, grit, and moisture.
Suffix C3: Radial internal clearance greater than normal; compensates for thermal expansion and press-fit stresses during continuous high-speed operation.
Dimensions & Engineering Specifications
| Bore (d) | O.D (D) | Width (B) | Clearance | Seal Type | Material | Brand |
|---|---|---|---|---|---|---|
| 30 mm | 62 mm | 20 mm (Wide) | C3 (Thermal) | 2RS (Rubber) | 100Cr6 Chrome Steel | KGI |
Key Competitive Advantages
Extended Grease Reservoir
The 20mm width allows for significantly more lubricant storage, preventing bearing dry-out under heavy loads and continuous rotation.
Anti-Seizure C3 Clearance
Provides extra internal space, effectively absorbing thermal expansion from the shaft and housing to prevent binding.
2RS Contact Sealing
NBR rubber seals ensure full protection against abrasive dust, moisture, and debris, maintaining lubricant purity.
Increased Axial Stability
The wider profile provides a more stable seating on the shaft, reducing deflection under belt or chain tension.
100Cr6 Chrome Alloy Steel
High-precision heat treatment (60-64 HRC) ensures superior wear resistance and fatigue life.
Maintenance-Free Design
Factory-pre-lubricated with premium grease, ready for immediate installation on production lines.
Typical Applications
- Industrial Alternators & Dynamos: Handling continuous rotation with high thermal loads.
- Agricultural Machinery: Combine harvesters, tractors, and feeders exposed to dust and soil.
- Pulleys, Idlers & Belt Tensioners: Resisting asymmetrical belt tension due to 20mm wide base.
- Conveyor Rollers: Reliable protection against contaminants in continuous material handling.
- Electric Motors: Supporting radial loads while maintaining shaft alignment.
Engineering Comparison: 62206 vs. 6206
Engineers and maintenance teams often clarify the difference between these standard and wide series bearings:
- Width Difference: While both share the same bore (30mm) and OD (62mm), the 62206 is 20mm wide, compared to the standard 6206 which is 16mm wide.
- Lubrication Capacity: The 62206 offers roughly 25-30% more space for grease, significantly extending service intervals.
- Installation Note: The housing or shaft must accommodate the 4mm extra width of the 62206 to allow for a proper fit.
Installation & Maintenance Best Practices
1. Correct Press-Fitting
Use mechanical sleeves that apply force ONLY to the inner race. Never press against the outer race or the rubber seals, as this will damage the seal and distort the bearing geometry.
2. Do Not Wash Out Grease
The bearing is pre-packed with high-quality factory grease. Cleaning with solvents (gasoline/thinner) will remove this specialized lubricant and reduce bearing life.
3. Verify Housing Clearance
Always confirm that the 20mm width can be accommodated without causing axial preloading against the bearing face.
Frequently Asked Questions (FAQ)
1. What are the exact dimensions of the KGI 62206?
Bore (Inner): 30mm | O.D (Outer): 62mm | Width: 20mm.
2. Why use C3 Clearance?
C3 clearance allows for thermal expansion without creating internal stress on the balls. This promotes smoother operation and extends life in high-speed or warm environments.
3. Can 62206 replace 6206?
Only if the housing and shaft have an extra 4mm of axial space available to accommodate the wider 20mm profile.
4. Difference between 2RS and ZZ seals?
2RS uses contact rubber seals, providing superior protection against dust and moisture. ZZ uses non-contact metal shields, better suited for clean environments and extremely high speeds.
Conclusion
The KGI 62206 2RS C3 Wide Series bearing is the superior choice for equipment requiring rigid axial support, extended lubrication life, and thermal resistance. Its combination of a 20mm width, premium chrome steel, and reliable sealing makes it a durable, cost-effective solution for industrial demands.
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