Electrical Protection – Breakdown voltage up to 3000V. Blocks stray currents to prevent electrical corrosion.
Standard Dimensions – Built to international standards for direct replacement of same-model bearings.
Precision Design and High-Speed Capability – With a reference speed of 10000 r/min and precision grinding, it ensures low vibration and noise, ideal for high-speed VFD applications.
Service Response – All inquiries are answered within 24 hours.
TFL 6313M/C4VL0241 is fully compatible with SKF/FAG/NKE/NSK/NTN 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 |
|---|---|---|---|---|
| 6313M/C4VL0241 | 6313M-J20AA-C4 | 6313-M-C4-SQ77 | 6313HDY2C3 | 7MC3-6313L1BC3 |
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.
Outer-ring insulation (VL0241) — same dimensions as standard bearing, direct replacement.
Plasma spray alumina coating — uniform, high-bond ceramic layer (100–500 μm).
Brass cage with C4 clearance — for enhanced radial play and reliability.
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 6313M/C4VL0241 is a critical component for traction motors in high-speed rail and heavy-haul locomotives operating in extreme climates. The C4 clearance is specifically engineered to compensate for the rapid thermal expansion of the rotor during high-speed acceleration, while the Machined Brass Cage (M) withstands the intense G-forces and vibrations typical of rail tracks. By leveraging China’s robust industrial supply chain, TFL can offer global operators a distinct advantage in production speed for these specialized brass-cage bearings, providing a reliable, quick-turnaround alternative to European brands that often suffer from extended lead times.
This bearing is designed for electric motors driving heavy-duty vibrating screens and crushers in mining operations, such as those from Metso or Sandvik. These motors experience severe vibration and heat, where the sturdy Brass Cage prevents structural fatigue failures common in steel cages, and the C4 clearance ensures free rotation under high operating temperatures. Furthermore, the VL0241 insulation acts as a critical safety feature in these hazardous environments, helping mining companies strictly adhere to explosion-proof regulations like ATEX or Mining Safety standards by preventing dangerous sparks caused by inverter-induced shaft voltages.
TFL 6313M/C4VL0241 is also applicable to inverter-driven motors on hot rolling mill run-out tables manufactured by brands like WEG or ABB. In this application, the ambient temperature is extremely high due to radiated heat from red-hot steel, making the C4 clearance mandatory to ensure the bearing inner ring has enough room to expand without locking up. Simultaneously, the insulated outer ring protects the bearing from electrical fluting caused by the frequent reversing and speed control of the VFDs, ensuring continuous operation in one of the harshest industrial environments without premature failure.
*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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