Plasma Spray Technology – Creates a coating with excellent wear and heat resistance.
Electrical Protection – Breakdown voltage up to 3000V. Blocks stray currents to prevent electrical corrosion.
Ample Stock – Our self-owned factory ensures a large inventory, capable of fulfilling most orders.
Service Response – All inquiries are answered within 24 hours.
TFL 6213/C4VL0241 is fully compatible with SKF, FAG, and NKE 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 |
|---|---|---|
| 6213/C4VL0241 | 6213-J20AB-C3 | 6213-M-C3-SQ77 |
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.
Plasma spray alumina coating — uniform, high-bond ceramic layer (100–500 μm).
Sheet metal cage with C4 clearance — for enhanced radial play and reliability.
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 6213/C4VL0241 is ideal for the high-speed motor shafts (approx. 65mm) found in Trane CenTraVac or Carrier 19XR centrifugal chillers. The lightweight 62-series design supports the high RPMs of centrifugal compression, while the C4 clearance handles the rapid temperature spikes during startup.
TFL’s VL0241 insulation protects against VFD-induced currents common in modern efficient chillers, offering a cost-effective alternative to OEM parts for HVAC maintenance teams.
Designed for KSB Etanorm or Grundfos NB/NK series pumps handling high-temperature fluids in district heating systems.The C4 clearance is strictly required here to prevent seizing caused by heat transfer from the hot water (up to 120°C) to the inner ring.
As these pumps are driven by VFDs to save energy, TFL’s insulated outer ring blocks shaft voltages, preventing premature bearing failure and extending the service life of these critical district heating assets.
Applicable to Siemens 1LE1 or WEG W22 motors used in Monforts textile stenter frames where internal temperatures are high. The 6213 size fits medium-power circulation fans. The C4 clearance ensures free rotation in the hot oven environment, while the insulation prevents fluting from the frequency inverters used to control air speed.
TFL offers a direct interchange for SKF 6213/C4VL0241, significantly reducing MRO costs for textile plants running 24/7 operations.
*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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