Electrical Protection: Breakdown voltage up to 3000V. Blocks stray currents to prevent electrical corrosion.
Interchangeable: Compatible with SKF/FAG models for a perfect replacement.
Reliable Quality: Compliant with ISO 9001 and REACH standards. The production process is fully traceable.
Service Response: All inquiries are answered within 24 hours.
TFL 6226/C3VL2071 perfectly achieves direct replacement for equivalent inner-ring insulated bearings from international brands like SKF and FAG in terms of dimensions (130x230x40mm), standard steel cage, C3 clearance, and VL2071 parameters. All delivered products pass strict dielectric and dimensional precision testing, ensuring safe and reliable “plug-and-play” installation in complex, high-heat VFD systems.
| SKF | FAG |
|---|---|
|
6226/C3VL2071
|
6226-J20C-C3
|
Meeting the dual requirements of a “130mm large bore and bore ceramic coating” for specialty insulated bearings poses an extremely high threshold for supply chain process integration and quality control. Relying on a robust premium power transmission network and a strict ISO 9001 certified quality control system, TFL seamlessly applies advanced temperature-controlled plasma spraying processes to large machinery standards. We provide high-reliability anti-erosion products rivaling top global brands, backed by a professional engineering team for technical selection support. With rapid-response stock availability and No MOQ services, TFL is dedicated to helping global industrial clients eliminate lead-time risks on specialized parts, achieving significant cost savings.
Inner-Ring Insulation (VL2071) — High-bond alumina coating on the bore and side faces to intercept shaft currents directly at the source.
Standard Pressed Steel Cage — Low friction and high efficiency, ideal for smooth, continuous high-speed operations.
High Dielectric Strength — Guaranteed breakdown voltage up to 3000 V DC; resistance > 50 MΩ.
TFL 6226/C3VL2071 inner-ring insulated bearings are exclusively designed for large VFD drive equipment operating under standard, smooth industrial loads with “restricted housing assemblies.” Typical applications encompass rail transit and large AC traction motors requiring absolute stator grounding, metallurgy centrifugal exhaust fans needing ultra-tight water-cooled assemblies, and large air separation compressors using split housings in chemical plants. When traditional outer-ring insulation cannot satisfy mechanical shielding or thermal conductivity demands, this large-bore model acts as the ultimate defense protecting the rotor system from electrical erosion.
In large traction motors and industrial generators built by Bombardier or ABB, to meet strict electromagnetic compatibility (EMC) and grounding protection codes, the motor end-shield must maintain direct metallic conductive contact with the bearing’s outer ring. This absolutely prohibits the use of outer-ring insulation coatings. TFL 6226/C3VL2071 employs inner-bore insulation, not only utilizing its 130mm large-bore medium cross-section to firmly support the massive rotor weight but also cutting off high-frequency leakage currents directly at the shaft journal, making it a highly cost-effective and reliable solution for motor overhauls.
In large centrifugal exhaust fans used in steel or cement plants (e.g., Howden systems), extreme exhaust heat conducts along the rotor main shaft. For forced cooling, housings are equipped with water-cooling jackets requiring an extreme interference fit with the bearing's outer ring for heat transfer. Under such assembly, a fragile outer-ring coating would be easily scraped off or act as a thermal barrier. TFL 6226/C3VL2071 perfectly bypasses housing assembly limits using its inner-ring VL2071 coating. Its standard steel cage adapts to steady high-speed operations, and the C3 clearance resolves differential thermal expansion caused by internal heat and external cooling, thoroughly curing inverter-induced electrical erosion.
In large petrochemical units, VFD-driven centrifugal compressors by Atlas Copco or MAN Energy Solutions often utilize a “top-bottom split” housing design to facilitate lifting the massive rotor. This structure demands absolute outer-ring conformance to the bore to ensure extremely high concentricity, usually forbidding any outer ceramic coatings. TFL 6226/C3VL2071 perfectly resolves this contradiction with its inner-ring insulation. Without altering the original precision housing assembly processes, it isolates high-frequency VFD currents right at the rotor shaft, ensuring continuous safe production for high-value equipment.
*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
