Alumina Coating: Breakdown voltage up to 3000V and resistance up to 200 MΩ.
Competitive Pricing: Efficient sourcing channels allow us to offer more competitive pricing than the market average.
Ample Stock: A stable supply chain and sufficient inventory enable us to fulfill most orders.
Reliable Quality: Compliant with ISO 9001 and REACH standards. The production process is fully traceable.
TFL 6030/C3VL2071 is a 100% equivalent and direct replacement for light-series, large-bore insulated bearings from SKF and FAG in terms of dimensions (150x225x35mm), standard steel cage structure, C3 clearance, and VL2071 parameters. During precision motor or high-frequency centrifugal compressor overhauls, customers do not need to perform any secondary machining of the housing bore or rotor shaft to achieve seamless plug-and-play installation. All delivered products pass rigorous dielectric strength and dimensional precision checks.
| SKF | FAG |
|---|---|
| 6030/C3VL2071 | 6030-J20C-C3 |
Supplying technically challenging inner-ring insulated bearings with a 150mm bore (controlling bore-coating adhesion and tolerances is far more complex than on the outer ring) is a test of premium supply chains and quality management. Relying on a robust premium industrial transmission supply chain network and an ISO 9001 certified quality control system, TFL seamlessly integrates imported temperature-controlled plasma spraying processes with precision large, thin-walled bearing standards. We provide high-reliability anti-erosion products rivaling top global brands, backed by a professional engineering team for technical selection and diagnostic support. With rapid-response stock availability and No MOQ, TFL is dedicated to helping global clients eliminate lead-time risks on large specialized parts, achieving significant cost optimization.
Inner-Ring Insulation (VL2071) — High-bond alumina coating on the bore and side faces to isolate high-voltage stray currents directly at the source.
Compact Light Series (60 Series) — Dimensions 150 x 225 x 35 mm, ideal for weight-restricted and space-constrained applications.
High Dielectric Strength — Guaranteed DC breakdown voltage up to 3000 V with resistance > 50 MΩ.
TFL 6030/C3VL2071 is exclusively developed for systems requiring a large 150mm shaft diameter, low system inertia, and strict weight control, but having extremely limited radial installation space and facing VFD high-frequency shaft currents. Typical applications cover traction motors in rail transit, compact high-pressure industrial centrifugal compressors, large commercial HVAC VFD fans, and high-speed guide roll drives in textile and paper machinery. Due to its unique VL2071 inner-ring ceramic insulation, it constructs the premier, robust barrier blocking high-voltage leakage when outer-ring assembly is restricted by housing grounding, water-cooling, or split designs.
In AC traction motors for urban transit and high-speed trains, to ensure strict electromagnetic compatibility (EMC) shielding and grounding between the stator and end-shields, the bearing’s outer ring must maintain direct bare-metal contact with the housing bore, making outer-ring coatings prohibited. Concurrently, the compact bogie space demands an extremely thin bearing cross-section to reduce unsprung weight. The compact 60 series structure of TFL 6030/C3VL2071 perfectly reduces rotor inertia. Its VL2071 bore ceramic coating directly intercepts high-frequency common-mode leakage currents at the 150mm rotor shaft, acting as a highly recommended anti-erosion solution for traction motor overhauls.
In large VFD-driven centrifugal fans and compressors used in commercial buildings or chemical plants, to maintain an extremely compact housing design, the housing bore tolerances and heat-dissipation fits are incredibly tight, prohibiting any outer cylindrical coatings. Here, TFL 6030/C3VL2071’s inner-ring insulation design thoroughly blocks parasitic shaft currents introduced by high-frequency PWM harmonics without altering housing heat transfer or precision tolerances. Its standard pressed steel cage ensures minimal running resistance, guaranteeing long-term steady-state energy efficiency under high-speed operations.
High-speed drive rolls in modern large paper machines (e.g., Valmet systems) are highly sensitive to roller rotational inertia and temperature rises, mostly utilizing lightweight, thin-walled 60 series bearings. Because electrostatic charges and common-mode leakage currents easily cause electrochemical spalling on raceways, electrical isolation is mandatory. TFL 6030/C3VL2071 provides high-strength support for a large 150mm shaft, while its inner-bore ceramic anti-corrosion layer protects raceways from high-frequency discharges. The standard low-friction steel cage avoids frictional self-heating, ensuring safety and stability for high-speed continuous assembly line 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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