Plasma Spray Technology: Creates a coating with excellent wear and heat resistance.
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.
Standard Dimensions: Built to international standards for direct replacement of same-model bearings.
TFL 6324M/C3VL2071 perfectly achieves direct replacement for equivalent inner-ring insulated heavy-duty bearings from international brands like SKF and FAG in terms of dimensions (120x260x55mm), brass cage design, 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, and high-vibration VFD systems.
| SKF | FAG |
|---|---|
| 6324M/C3VL2071 | 6324-M-J20C-C3 |
Manufacturing a specialty insulated bearing that simultaneously requires a “120mm ultra-heavy cross-section, brass cage, C3 clearance, and bore ceramic coating” poses extremely stringent demands on supply chain process integration and quality control. Relying on a robust premium industrial transmission supply chain network and a strict ISO 9001 certified quality control system, TFL seamlessly applies internationally advanced temperature-controlled bore spraying processes to heavy machinery 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 delivery and No MOQ services, TFL is dedicated to helping global industrial clients eliminate lead-time risks on specialized heavy parts, achieving significant cost optimization.
Inner-Ring Insulation (VL2071) — High-bond alumina coating on the bore and side faces to intercept shaft currents directly.
Heavy-Duty 63 Series Design — Massive 120 x 260 x 55 mm dimensions, engineered for extreme radial loads.
High Dielectric Strength — Guaranteed breakdown voltage up to 3000 V DC; electrical resistance > 50 MΩ.
TFL 6324M/C3VL2071 inner-ring insulated heavy-duty bearings are exclusively designed for industrial behemoths facing “strict prohibitions on outer-housing coating interference” alongside ultra-heavy loads, strong mechanical vibrations, and VFD leakage currents. Typical applications encompass AC traction motors in heavy-haul locomotives requiring absolute stator grounding, metallurgy heavy fans needing ultra-tight water-cooled assemblies, and large mining hoists or centrifugal compressors using split housings. When traditional outer-ring insulation cannot meet mechanical shielding or assembly demands, this heavy-duty model with a brass cage serves as the ultimate defense for the rotor system.
In AC traction systems for heavy-haul freight locomotives by Alstom or Bombardier, to meet exceedingly strict electromagnetic compatibility (EMC) codes, the motor end-shield must maintain direct metallic conductive contact (grounding) with the bearing’s outer ring. This absolutely prohibits the use of outer coatings. TFL 6324M/C3VL2071 employs an inner-bore insulation design, utilizing its giant 63 series cross-section and brass cage to firmly resist severe track impacts while cutting off high-frequency common-mode leakage currents directly at the shaft journal, making it a highly recommended anti-erosion solution for locomotive overhauls.
In large heavy-duty centrifugal fans used in steel mills (e.g., Howden systems), extreme exhaust heat conducts along the rotor shaft. For forced cooling, housings are equipped with tight 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 scraped off or act as a thermal barrier. TFL 6324M/C3VL2071 bypasses outer-ring mechanical limits using its inner-ring VL2071 coating. Its robust brass cage resists unbalanced airflow vibrations, while its C3 clearance resolves dangerous differential thermal expansion, thoroughly curing inverter-induced electrical erosion damage.
At the drive ends of large mine hoists or giant Atlas Copco centrifugal compressors, the housing often utilizes a “top-bottom split” design to facilitate lifting the heavy rotor. This structure demands absolute outer-ring conformance to the bore to ensure micron-level concentricity. TFL 6324M/C3VL2071 blocks high-frequency shaft voltages generated by VFD systems directly at the bore without altering the equipment’s original precision housing assembly. Its brass cage and ultra-high compressive strength 63 series structure ensure continuous safe operation for heavy-duty equipment under severe vibration 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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