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.
Standard Dimensions – Built to international standards for direct replacement of same-model bearings.
Competitive Pricing – Factory-direct sales allow us to offer prices below the market average.
Reliable Quality – Compliant with ISO 9001 and REACH standards. The production process is fully traceable.
TFL 6214/C4VL0241 is fully compatible with SKF/FAG/NKE/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 | NTN |
|---|---|---|---|
| 6214/C4VL0241 | 6214-J20AA-C4 | 6214-M-C4-SQ77 | 7MC3-6214C3 |
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 10000 r/min.
C4 Clearance – Absorbs shaft deflection caused by heavy vibrations in harsh machinery.
Outer-ring insulation (VL0241) — same dimensions as standard bearing, direct replacement.
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 6214/C4VL0241 is an ideal fit for the high-speed drive shafts of large centrifugal chillers. In these applications, the “62” light series design minimizes rolling friction at high RPMs, while the C4 clearance allows for the thermal expansion of the inner ring during the rapid temperature spikes of startup sequences. By capitalizing on the agility of China’s industrial supply chain, TFL can offer these specialized high-speed insulated bearings with significantly shorter lead times than European competitors, ensuring that critical HVAC maintenance projects during peak seasons are not delayed by parts shortages.
Designed for electric motors driving hot water circulation pumps in district heating networks, such as Grundfos NK or KSB Etanorm models operating at fluid temperatures exceeding 100°C. The heat from the pumped medium transfers through the shaft to the bearing inner ring, making the C4 clearance mandatory to prevent radial seizing caused by thermal expansion. Furthermore, as global energy efficiency regulations (such as the EU Ecodesign Directive) increasingly mandate the use of Variable Frequency Drives (VFDs) for these pumps, TFL’s insulated outer ring becomes a crucial compliance enabler, protecting the motor from VFD-induced stray currents and ensuring sustainable, uninterrupted service.
This model is frequently applied in the main drive motors of oil-injected rotary screw compressors, commonly used in Atlas Copco GA Series equipment. These compressors operate continuously at high speeds to maintain factory air pressure, generating substantial heat that requires the C4 internal clearance to maintain proper lubrication film thickness. TFL’s VL0241 coating effectively isolates the bearing from the high-frequency shaft voltages generated by the compressor’s energy-saving VSD (Variable Speed Drive) inverters, preventing the fluting damage that typically leads to expensive air-end failures.
*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.
Discover more related products for your needs. Check out our hot-selling bearing models that serve as trusted alternatives to major brands like SKF and FAG—offering the same performance with greater value.
"*" indicates required fields
"*" indicates required fields
"*" indicates required fields
