Alumina Coating: Breakdown voltage up to 3000V and resistance up to 200 MΩ.
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.
Flexible MOQ: Low Minimum Order Quantity (MOQ). Supports both small-batch and large-volume orders.
TFL 6224/C4VL0241 perfectly achieves direct replacement for equivalent insulated bearings from international brands like SKF and FAG in terms of dimensions (120x215x40mm), standard steel cage design, and C4 extra-large clearance standard. All delivered products pass 100% dielectric and dimensional precision testing, ensuring “plug-and-play” installation and reliable lifespan in high-heat VFD systems across paper and metallurgy industries.
| SKF | FAG | NKE | NSK | NTN |
|---|---|---|---|---|
|
6224/C4VL0241
|
6224-J20AB-C4
|
6224-M-C3-SQ77
|
6224HDY2C3
|
7MC3-6224C3
|
Focusing on the demand for high-end insulated bearings combining a 120mm large bore with C4 extra-large clearance, TFL relies on a robust industrial transmission supply chain network and an ISO 9001 certified quality control system to seamlessly integrate advanced temperature-controlled plasma spraying processes with precision large bearings. We not only provide high-reliability anti-erosion products that rival or exceed top global brands, but also equip you with a professional engineering team for selection and diagnostic support. With flexible No MOQ services and rapid-response capabilities, TFL is dedicated to helping global clients eliminate lead-time anxieties during urgent maintenance, achieving significant cost savings.
Large-Bore Medium Series — Dimensions 120 x 215 x 40 mm, robustly supporting heavy radial loads.
C4 Extra-Large Clearance — Absolutely critical for extreme temperature gradients and massive heat transfer.
Outer-Ring Ceramic Insulation — Provides reliable breakdown voltage up to 3000 V DC.
TFL 6224/C4VL0241 is explicitly designed for industrial equipment facing “extreme heat coupled with strong VFD interference” yet maintaining relatively smooth mechanical vibration. Typical applications encompass ultra-high-temperature dryer drive motors in large paper machinery, main drives for metallurgical annealing lines, high-temperature exhaust fans in chemical plants, and high-temp circulation pumps in district heating networks. The combination of C4 clearance and a standard steel cage ensures highly energy-efficient and safe operation under severe thermodynamic conditions.
In the dryer sections of large paper machines by Valmet and Voith, drive motors operate year-round in extremely high-temperature steam environments. Bearings with standard C3 clearance are highly prone to seizure as thermal expansion depletes internal space. TFL 6224/C4VL0241’s C4 extra-large clearance perfectly absorbs intense thermal stress, while its 3000V outer-ring insulation completely resolves inverter-induced electrical erosion, serving as a standard solution for the long-term, smooth operation of equipment in high-heat zones of paper mills.
In high-temperature exhaust centrifugal fans by Howden or TLT-Turbo used in metallurgy and large chemical plants, massive amounts of heat transfer directly from the impeller to the non-drive end bearing position. Paired with TFL 6224/C4VL0241, its C4 clearance prevents bearing seizure caused by rapid temperature changes, the steel cage provides minimal resistance at steady high speeds, and the VL0241 insulation coating blocks high-frequency currents, drastically improving the fan's uptime.
High-power VFD motors by ABB or Siemens used on steel continuous annealing and heat treatment lines are subjected to long-term high-temperature radiation. Relying on its robust 120mm radial support, coupled with the anti-seizure C4 clearance design and insulated outer ring, TFL 6224/C4VL0241 completely eliminates “micro-arcing” erosion of the bearing raceways by parasitic currents, ensuring uninterrupted production for critical metallurgical equipment under thermodynamically extreme 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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