Superior Electrical Isolation – Outer ring treated with plasma-sprayed aluminum oxide ceramic layer (100–500 μm thick), with breakdown voltage up to 3000V to sever shaft currents and prevent corrosion or lubricant failure.
Exquisite Craftsmanship and High-Speed Adaptability – Reference speed reaching 9000 r/min via precision grinding for minimal vibration and noise, perfectly suited for fast variable-frequency scenarios.
Perfect Matching and Convenient Replacement – Identical specs to SKF/FAG/NKE/NSK/NTN models for effortless switching, optimizing procurement budgets while maintaining equal dependability.
TFL 6315M/C4VL0241 aligns precisely with SKF/FAG/NSK/NTN/NKE equivalents in specs, clearance, and insulation metrics, enabling installation without alterations. Every unit passes high-pressure endurance and dimensional precision checks, streamlining overall expenses while matching efficacy. Selecting TFL grants ISO-standard quality assurance and highly adaptive supply chain collaboration.
| SKF | FAG | NKE | NSK | NTN |
|---|---|---|---|---|
| 6315M/C4VL0241 | 6315-M-J20AA-C4 | 6315-M-C4-SQ77 | 6315HDY2C3 | 7MC3-6315L1BC3 |
TFL is committed to innovative production of electrically insulated bearings, utilizing cutting-edge plasma-spraying to firmly bond the aluminum oxide ceramic layer for durable isolation efficacy. Holding ISO 9001:2015 certification, we allow elastic no-minimum-order supplies and cover full-process services from conceptual design to ongoing technical aid. Adopting TFL schemes not only yields affordable efficient products but also clearly reduces upkeep expenditures and operational interruption hazards.
Breakdown voltage (DC) — 1000–3000 V; electrical resistance 50–200 MΩ.
Machined Brass Cage – Offers superior durability and shock resistance for heavy-duty applications.
C4 Clearance – Absorbs shaft deflection caused by heavy vibrations in harsh machinery.
TFL insulated bearings frequently serve in VFD motors, generator units, pumping devices, fan equipment, and wind power fields. The ceramic layer reliably isolates shaft current paths to reduce electrical corrosion damage, particularly aligning with high-pressure and speed-fluctuating operational environments. These bearings assist machinery in maintaining efficient operation amid wet or shaky conditions, clearly strengthening overall system persistence.
TFL 6315M/C4VL0241 is engineered for the traction motors of high-speed trains and heavy-haul locomotives, such as those on CRRC Fuxing or Siemens Velaro platforms. In these extreme applications, the C4 clearance is mandatory to accommodate the rapid thermal expansion of the rotor during aggressive acceleration and sustained high-speed running, while the Machined Brass Cage (M) provides the necessary structural integrity to survive the high G-forces from the track. Capitalizing on China’s comprehensive industrial supply chain, TFL offers a distinct advantage in production agility for these specialized brass-cage bearings; we can deliver “Drop-in” replacements with lead times drastically shorter than European manufacturers, ensuring that railway operators can maintain fleet availability without waiting months for spare parts.
Designed for the large electric motors driving vibrating screens and crushers in mining operations, typically found in Metso or Sandvik equipment lines. These motors are subjected to extreme vibration and heat generation; standard steel cages often suffer fatigue failure, making the robust Machined Brass Cage mandatory for reliability. The C4 clearance prevents the bearing from seizing under the high operating temperatures common in mining pits. Furthermore, the VL0241 insulation serves as a vital safety feature for compliance with strict mining regulations (such as ATEX or MA standards); by preventing electrical arcing caused by VFD-induced shaft voltages, it eliminates a potential ignition source in environments filled with combustible coal dust or explosive gases.
Applicable to the heavy-duty inverter motors driving the run-out tables in hot rolling mills. In this environment, the motors are exposed to intense radiant heat from the passing red-hot steel slabs, which necessitates the C4 clearance to ensure sufficient internal space for thermal expansion without locking up. The 63-series design handles the heavy shock loads of the steel slabs, while the insulated outer ring protects the bearing from electrical fluting caused by the precise speed control of the Variable Frequency Drives. TFL provides a robust, dimensionally interchangeable solution that allows steel plants to extend maintenance intervals and reduce the total cost of ownership in these grueling conditions.
*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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