High-Voltage Ceramic Insulation – Plasma-sprayed alumina coating (100–500 μm) delivers 1000–3000 V dielectric strength, preventing fluting damage caused by VFD-induced shaft currents.
Solid Brass Cage – The M-design brass cage enhances thermal resistance, shock tolerance, and stability under heavy-duty and continuous operation.
C4 Internal Clearance – Extra clearance ensures reliable performance in high-temperature or high-speed applications where thermal expansion is significant.
Direct Replacement Compatibility – Fully interchangeable with SKF 6311M/C4VL0241, FAG 6311-M-J20AA-C4, and NTN 2TS2-7MC2-6311M8C4, with no MOQ and fast delivery options available.
TFL 6311M/C4VL0241 matches SKF, FAG, and NTN equivalents in dimensions, brass cage structure, C4 internal clearance, and dielectric performance. Each bearing undergoes dielectric withstand testing and dimensional inspection to guarantee full compatibility and dependable performance.
| SKF | FAG | NTN |
|---|---|---|
| 6311M/C4VL0241 | 6311-M-J20AA-C4 | 2TS2-7MC2-6311M8C4 |
TFL utilizes advanced plasma-spraying technology to create a dense alumina insulation layer that maintains stability under high temperature, humidity, and VFD-driven load changes. Certified under ISO 9001, ROHS, and REACH, we support OEM/ODM projects, no MOQ, and fast delivery—offering a cost-effective alternative to SKF and FAG without compromising performance.
Breakdown voltage 1000–3000 V; resistance 50–200 MΩ
M-design brass cage — excellent thermal and mechanical stability
C4 internal clearance for high-temperature applications
TFL 6311M/C4VL0241 is widely used in high-temperature VFD motors, generators, centrifugal pumps, compressors, fans, and wind turbine systems. The ceramic insulation prevents shaft currents, while the C4 clearance accommodates thermal expansion, ensuring reliable operation in demanding industrial environments.
TFL 6311M/C4VL0241 is suitable for ABB M3BP VFD motors. High temperatures and PWM switching often induce shaft currents; the C4 clearance and ceramic insulation greatly improve stability (compatibility example only).
In Grundfos CR pumps, KSB Eta pumps, and Siemens industrial fans, humidity and vibration are typical. TFL’s brass cage and insulated outer ring ensure durability under these conditions (for compatibility illustration only).
TFL 6311M/C4VL0241 is suitable for generator systems in Goldwind GW121/2500, Vestas V90, and Siemens Gamesa 2.3 MW turbines. The C4 clearance and ceramic coating ensure long-term stability under humidity and thermal fluctuation (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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