Superior Dielectric Protection – The outer ring uses a plasma-sprayed alumina ceramic coating (100–500 μm) providing 1000–3000 V dielectric strength, preventing electrical erosion and lubricant degradation.
High-Speed Stability with Low Vibration – Precision-ground raceways and optimized cage design ensure smooth operation under high-speed and VFD-driven conditions.
Direct Replacement Compatibility – Fully interchangeable with SKF 6311/C3VL0241, FAG 6311-J20AA-C3, and NTN 2TS2-7MC2-6311M8#01 with identical dimensions and insulation level.
Fast Delivery & Technical Support – TFL offers ready stock, no MOQ, and direct engineering support for urgent replacements and long-term maintenance planning.
TFL 6311/C3VL0241 is fully compatible with SKF, FAG, and NTN equivalents in dimensions, tolerances, and insulation performance. Each bearing is tested for dielectric strength and dimensional accuracy, ensuring equal reliability while delivering better cost efficiency.
| SKF | FAG | NTN |
|---|---|---|
| 6311/C3VL0241 | 6311-J20AA-C3 | 2TS2-7MC2-6311M8#01 |
TFL uses advanced plasma-spraying technology to create a dense and uniform alumina insulation layer on the outer ring, ensuring long-term dielectric stability even in humid or high-frequency operating environments. Certified under ISO 9001, ROHS, and REACH, we provide OEM/ODM customization, no MOQ, and fast delivery—offering a cost-effective alternative to leading global brands.
Plasma-sprayed alumina coating (100–500 μm) – Provides a strong, uniform insulation barrier.
Breakdown voltage 1000–3000 V; insulation resistance 50–200 MΩ
Outer-ring insulation VL0241 standard — identical dimensions to conventional 6311 bearings
TFL 6311/C3VL0241 is widely used in VFD motors, generators, industrial pumps, centrifugal fans, cooling tower motors, and wind turbine systems. The insulation layer prevents shaft currents and reduces erosion risks, making it ideal for high-voltage, variable-speed, and high-humidity environments.
TFL 6311/C3VL0241 is suitable for Siemens 1LE0001 and ABB M3BP series VFD motors. Shaft currents in these systems often cause fluting damage. TFL’s alumina coating withstands 1000–3000 V while maintaining full interchangeability, making it a recommended alternative to SKF INSOCOAT and FAG J20AA bearings (application compatibility example, not an installation claim).
TFL 6311/C3VL0241 is recommended for Grundfos CR multistage pumps, KSB Eta centrifugal pumps, and Siemens industrial fans. Variable-frequency operation combined with humidity can introduce electrical disturbances; TFL’s outer-ring insulation ensures long-term dielectric stability (compatibility example only).
In wind turbine applications, TFL 6311/C3VL0241 can be applied in Goldwind GW121/2500, Vestas V90, and Siemens Gamesa 2.3 MW generator or auxiliary systems. These units face humidity and variable loads; TFL’s ceramic coating withstands up to 3000 V and offers corrosion resistance, making it a recommended solution (compatibility example only).
*The brands and series mentioned are provided for industry illustration only. Final bearing selection should be confirmed through verification of dimensions, clearance class, insulation type, and operating conditions. For selection assistance or technical consultation, please contact the TFL engineering team for support.
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