Electrical Protection: Breakdown voltage up to 3000V. Blocks stray currents to prevent electrical corrosion.
Service Response: All inquiries are answered within 24 hours.
Interchangeable: Compatible with SKF/FAG models for a perfect replacement.
Competitive Pricing: Efficient sourcing channels allow us to offer more competitive pricing than the market average.
TFL 6330/C3VL2071 is fully interchangeable with equivalent inner-ring insulated bearings from SKF and FAG in physical geometry, rotational precision, and dielectric properties. Its “VL2071” (SKF) or “J20C” (FAG) suffix identifies the industry-standard inner-ring coating solution, enabling seamless integration into existing generator and large-scale VFD drive shaft systems. Rigorous high-voltage resistance inspection prior to delivery ensures consistent reliability in heavy-industrial MRO and wind power maintenance.
| SKF | FAG | NKE |
|---|---|---|
| 6330/C3VL2071 | 6330-J20C-C3 | 6330-M-C3-SQ77E |
TFL is an integrated supplier focused on the field of industrial electrically insulated bearings. Leveraging a robust supply chain network and a strict ISO 9001 quality monitoring system, we are committed to providing global clients with large rolling bearings of equivalent electromagnetic protection quality. Through flexible zero-MOQ support, competitive logistics lead times, and expert application selection consulting, TFL comprehensively helps enterprises reduce unplanned downtime and significantly lower procurement costs.
Inner Ring Ceramic Coated (VL2071) — Alumina insulation is applied to the inner ring, well-suited for high-frequency shaft currents.
Excellent Dielectric Strength — Guaranteed insulation protection up to 3000 V DC.
Heavy 63 Series Construction — Oversized 150mm bore with high radial load capacity.
The TFL 6330/C3VL2071 large-size insulated bearing is specifically supplied for heavy-duty industrial VFD drive equipment requiring extreme load capacity and insulation reliability. Typical target fields include megawatt-class wind turbine generators, high-voltage explosion-proof motors, heavy-duty pulp refiners, and electric rotating assemblies in rail traction systems with rotating outer rings or high-frequency inverter drives.
TFL 6330/C3VL2071 can be applied in Vestas or Siemens Gamesa 2.0MW to 3.5MW wind turbine generator systems. Since high-power generators under high-speed, variable loads produce continuous VFD surges, this model uses its 3000V inner-ring insulation layer to isolate the generator bearing housing. Having a smaller surface area than outer-ring coatings, it demonstrates superior shielding efficiency against high-frequency induced voltages.
In high-power VFD motors utilizing high-frequency PWM control, such as the Siemens 1LG4 or ABB M3BP series, the TFL 6330/C3VL2071 is highly recommended to defend against induced high-frequency voltages. The bearing's C3 clearance structure perfectly balances heat dissipation during heavy-load operation, preventing premature carbonization and deterioration of grease from electrical erosion, making it a recommended spare part for key main drive motors in paper, pharmaceutical, and chemical fertilizer industries.
For large-scale refiners, heavy crushers, or massive fluid transport compressors from brands like CITIC Heavy Industries, transmission shafts are prone to gathering leakage currents from static and VFD interference under severe conditions. Leveraging the ultra-high load capacity of the heavy 63 series, along with the high-strength inner-ring ceramic barrier, the TFL 6330/C3VL2071 ensures trouble-free transmission systems and isolates electrical noise in control boards caused by bearing discharges.
*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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