Electrical Protection: Breakdown voltage up to 3000V. Blocks stray currents to prevent electrical corrosion.
Service Response: All inquiries are answered within 24 hours.
Plasma Spray Technology: Creates a coating with excellent wear and heat resistance.
Variety of Types: Both C3/C4 and brass retainers, stamped steel retainers, are available for selection.
TFL 6326/C3VL0241 is a 100% equivalent and direct replacement for large-size heavy-duty insulated bearings from SKF and FAG in terms of dimensional specifications, heavy-duty raceway standards, C3 clearance, and VL0241 outer-ring physical properties. Customers do not need to perform any secondary machining on existing motor shafts or housings during large motor or industrial pump overhauls.
| SKF | FAG | NKE | NSK | NTN |
|---|---|---|---|---|
| 6326/C3VL0241 | 6326-J20AA-C3 | 6326-M-C3-SQ77 | 6326HDY2C3 | 7MC3-6326C3 |
For ultra-large heavy-duty bearings with a 130mm bore, 280mm OD, and weighing over 15kg, ensuring the insulation uniformity and adhesion of the outer-ring ceramic coating is a core test. Relying on a robust industrial transmission supply chain network and an ISO 9001 certified quality control system, TFL seamlessly integrates imported plasma temperature-controlled spraying processes with precision large-machinery standards. We provide high-reliability anti-erosion products rivaling top global brands, backed by a professional engineering team for comprehensive technical and selection support. With rapid response and No MOQ, TFL is dedicated to helping global industrial clients eliminate lead-time risks on specialized heavy parts, achieving significant cost optimization.
Heavy-Duty 63 Series — Massive 130 x 280 x 58 mm dimensions, built for extreme radial load support (weight approx. 15.2 kg).
Plasma-Sprayed Insulation (VL0241) — Dense alumina outer coating guaranteeing breakdown voltage up to 3000 V DC.
Optimal Insulation Resistance — Maintains 50–200 MΩ, efficiently eliminating VFD-induced raceway fluting.
TFL 6326/C3VL0241 is widely applied in large VFD drive systems operating under standard, smooth heavy-industrial loads. Typical applications encompass large horizontal water transport pumps in municipal or industrial water systems, large centrifugal fans in chemical plants, drive shafts in paper mills, and centrifugal compressors in large commercial HVAC systems. Its standard heavy-duty steel cage structure is ideal for steady-state continuous high-load operation, while the reliable outer-ring insulation perfectly cuts off high-frequency shaft voltages introduced by VFD systems within standard housing seats.
In high-power industrial VFD motors built by Siemens or ABB, high-frequency common-mode voltages easily puncture the lubricating oil film of standard bearings, triggering electrical erosion. TFL 6326/C3VL0241’s steel cage design is lightweight and low-friction, perfectly suited for continuous smooth running at medium-to-high speeds. Its 3000V outer-ring alumina coating provides excellent anti-erosion protection under standard end-shield fits, serving as a highly cost-effective SKF INSOCOAT alternative for large motor overhauls.
In large VFD centrifugal pumps by Sulzer and KSB widely used in water management and power plant boiler feed systems, the rotor requires long-term, uninterrupted, stable support. Utilizing the TFL 6326/C3VL0241 as the non-drive end (NDE) bearing, the C3 clearance safely absorbs the thermal expansion of the 130mm shafting during full-speed runs. Its insulation layer completely eliminates galvanic corrosion, extending the life of expensive specialty greases and drastically prolonging the pump sets' maintenance intervals.
At the main drive ends of large-volume centrifugal compressors by Atlas Copco or Carrier used in cold storage or air separation units, high-power VFDs easily trigger intense parasitic shaft voltages. TFL 6324/C3VL0241 (or 6326/C3VL0241 series) provides stable radial support and 50–200 MΩ insulation resistance, efficiently isolating high-frequency interference currents. This ensures the raceways are safe from arc-spalling threats, improving the overall uptime of the production line.
*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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