Excellent Electrical Insulation – The outer ring features a plasma-sprayed aluminum oxide coating (100–500 μm thick) with dielectric strength up to 3000V, blocking shaft currents to prevent electrical erosion and lubricant degradation.
Full Compatibility and Direct Replacement – Matching dimensions of SKF and FAG equivalents for seamless interchange, delivering equal reliability at a lower cost.
Variety of Types – Both C3/C4 and brass retainers, stamped steel retainers, are available for selection.
Ample Stock – Our self-owned factory ensures a large inventory, capable of fulfilling most orders.
TFL 6314M/C3VL0241 is fully compatible with SKF/FAG/NKE/NTN/NSK equivalents in dimensions, clearance, and insulation performance, allowing direct replacement without equipment modifications. Each bearing undergoes rigorous dielectric testing and dimensional checks, offering equivalent reliability while reducing total ownership costs. Opting for TFL provides ISO-certified quality and flexible supply chain support.
| SKF | FAG | NKE | NSK | NTN |
|---|---|---|---|---|
| 6314M/C3VL0241 | 6314-M-J20AA-C3 | 6314-M-C3-SQ77 | 6314HDY2C3 | 7MC3-6314L1BC3 |
TFL specializes in the development and manufacturing of electrically insulated bearings, using advanced plasma-spraying technology to ensure a uniform aluminum oxide coating for long-term stable insulation. Certified under ISO 9001:2015, we offer flexible delivery with no MOQ and provide end-to-end services from design to technical support. Choosing TFL means accessing cost-effective products that reduce maintenance costs and downtime risks.
High reference speed — up to 9500 r/min.
Breakdown voltage (DC) — 1000–3000 V; electrical resistance 50–200 MΩ.
C3 Clearance – Accommodates thermal expansion to prevent seizing during high-speed motor operation.
TFL insulated bearings are widely used in VFD motors, generators, pumps, fans, and wind turbine systems. The insulation coating blocks shaft current paths to minimize electrical erosion, making them ideal for high-voltage and variable-speed operations. Our bearings ensure stable performance in humid and vibratory conditions, extending overall system life.
TFL 6314M/C3VL0241 is a standard fitment for the non-drive end of traction motors in metro and commuter trains, such as those found on Siemens Velaro or CRRC platforms. In this application, the Machined Brass Cage (M) is non-negotiable due to its ability to withstand the intense mechanical shocks and acceleration forces transmitted from the track, which would rapidly destroy a standard steel cage. The VL0241 insulation protects the bearing from electric erosion caused by the traction inverter’s high switching frequencies. Leveraging China’s robust industrial manufacturing capabilities, TFL provides these specialized brass-cage bearings with a production turnaround time significantly faster than European competitors, offering global railway operators a reliable “Drop-in” replacement solution to keep fleet maintenance schedules on track.
Designed for the heavy-duty electric motors driving main ventilation fans in underground mines, typically manufactured by Howden or TLT-Turbo. These fans operate 24/7 under high radial loads, requiring the robust geometry of the 63-series combined with the stability of a Brass Cage to prevent catastrophic failure. The C3 clearance manages the operating temperature equilibrium. Crucially, the VL0241 insulated outer ring acts as a vital safety component; by blocking stray currents and preventing spark generation within the bearing, it helps mining operators strictly comply with ATEX or MA (Mining Safety) explosion-proof regulations, mitigating the risk of ignition in methane-rich or coal-dust environments.
This bearing is frequently used in the main drive motors of large oil-flooded screw compressors, such as premium models from Sullair or Atlas Copco. The Machined Brass Cage is preferred in these premium units for its superior wear resistance and low friction properties during high-speed operation, ensuring a longer service life than steel cages. As these compressors increasingly utilize VSD (Variable Speed Drive) technology to improve energy efficiency, TFL’s insulated coating effectively neutralizes the shaft voltages generated by the drive, preventing fluting damage and ensuring the compressor delivers reliable air pressure without unexpected downtime.
*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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