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6320/C3VL2071 Electrically Insulated Ball Bearings

6320/C3VL2071 Electrically Insulated Ball Bearings

The picture shows an electrical insulated bearing 6320/C3VL2071. Its inner ring has an insulating coating and the cage is made of steel.
Inner ring insulated deep groove ball bearing with a pressed steel cage.
Inner ring insulated deep groove ball bearing with a pressed steel cage.
Steel cage bearing with inner ring insulation designed for variable frequency drive motors.
Inner ring coated bearing with stamped steel cage preventing electrical erosion.
Side view of an inner insulated bearing with a steel cage for electric motors.

Ready to Ship: 6320/C3VL2071 Deep Groove Ball Bearings with Low MOQ

  • Electrical Isolation: The inner ring (VL2071) is coated with an aluminum-oxide insulating layer to block stray currents.
  • High Voltage Withstanding: Insulation can sustain approximately 1,000–3,000 V DC.
  • Direct Interchangeability: Fully dimensionally compatible with standard 6320 bearings for straightforward retrofits.
  • Cost-Effective & Fast Delivery: Lower cost than major OEM brands, plus quicker lead times from local TFL inventory.
$ 2925 /Each
  • Customized Logo: Min. Order 1 Piece
  • Customized Packaging: Min. Order 1 Piece
  • Inventory: In stock
  • Country of Origin: China
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Bulk orders will be discounted, please contact our sales for a bulk quote. We will ship your order via FedEx within 3-5 working days after you complete the payment and the related information will be sent to your email.
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    Description Interchangeable Features Application Q&A Related products

Product Parameters

  • Model 6320/C3VL2071
  • Equivalent Interchange 6320/C3VL2071 (SKF), 6320-J20C-C3 (FAG), 6320-M-C3-SQ77E (NKE)
  • Product Category Electrically Insulated Ball Bearings
  • Coating Suffix VL2071
  • Insulating Coating Types Inner ring insulation coating
  • Manufacturers TFL
  • Bore Diameter 100.0 mm
  • Outside Diameter 215.0 mm
  • Width 47.0 mm
  • Net Weight 6.98kg
  • Basic Dynamic Load Rating 182.0 kN
  • Basic Static Load Rating 140.0 kN
  • Reference Speed 6700.0 r/min
  • Breakdown Voltage (DC) 1000 ~3000 V
  • Layer Thickness 100~500 µm
  • Electrical Resistance 50~200 MΩ
  • Cage Material Sheet metal
  • Radial Internal Clearance C3
  • ROHS Compliant
  • REACH Compliant
6320/C3VL2071 Electrically Insulated Ball Bearings Drawing.dwg
Download DWG Download PDF

6320/C3VL2071 Equivalent Interchange Brands

TFL’s 6320/C3VL2071 electrically insulated deep groove ball bearings serve as high-quality, cost-effective alternatives to equivalents from SKF (e.g., 6320/C3VL2071), NTN, FAG, NKE, and NSK. Not only do they match or exceed performance in insulation and durability, but they also offer lower pricing, reduced minimum order quantities for greater flexibility, faster global shipping, and customizable features to meet specific project needs – all while maintaining strict quality standards for reliable operation.
TFL SKF FAG NKE
6320/C3VL2071
6320/C3VL2071
6320-J20C-C3
6320-M-C3-SQ77E

Why Choose TFL 6320/C3VL2071 Electrically Insulated Bearings?

TFL delivers exceptional value with the 6320/C3VL2071, combining advanced insulation technology for superior electrical protection, high compatibility across brands, and significant cost savings compared to OEM options. Our electrically insulated bearings are strictly tested for breakdown voltage and dimensional accuracy. Compared to other insulation methods (e.g., shaft insulation sleeves or grounding brushes), insulated bearings are maintenance-free, take up little space, and simplify system design.
The picture shows an electrical insulated bearing 6320/C3VL2071. Its inner ring has an insulating coating and the cage is made of steel.

Features of 6320/C3VL2071

  • Inner-ring insulation (VL2071) offers lower capacitance and higher impedance, well-suited for high-frequency PWM drives and generators.
  • Single-Row Deep Groove Design: Ensures high radial load handling with low maintenance, suitable for both directions of axial forces.
  • Heavy Duty Load Capacity: With a dynamic load rating matching standard 6320 deep groove ball bearings, it handles heavy radial loads and moderate axial loads efficiently.
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Common Applications of Electrically Insulated Bearings

VL2071 features an aluminium oxide insulating coating on the inner ring. When the outer ring has a loose fit with the bearing housing (to accommodate thermal expansion) while the inner ring has an interference fit with the shaft, inner ring insulation is specifically selected to ensure the insulating coating does not fail due to fretting wear.
electrically insulated bearing with inner ring coating for motors

Industrial Motors

The 6320 model bearing is commonly used in the Drive End (DE) and Non-Drive End (NDE) of electric motors to support the rotating shaft and withstand radial loads, while providing low noise and high-speed performance. The 6320/C3VL2071 is used in the NDE of variable frequency drive (VFD) motors to prevent high-frequency shaft currents generated by the inverter from damaging the bearing. In WEG’s W50 series high-voltage/high-power industrial motors, the 6320 insulated bearing is often specified for the motor’s NDE to interrupt the shaft current circuit.
Inner ring coated bearing preventing electrical erosion for wind turbines

Wind Energy

The 6320 model bearing is commonly used in the generator and main shaft sections of wind turbines, providing high load capacity and low vibration performance. Since wind turbine generators are typically located at high altitudes where maintenance is extremely expensive, and because the generator itself not only produces induced voltage but is also controlled by converters, bearings with either inner or outer ring insulation must be used to ensure a 20-year design life. In the generators of the Vestas V90-2.0MW or similar megawatt-class wind turbines, the 6320/C3VL2071 (or its interchangeable equivalent) is frequently used as the non-locating bearing for the generator rotor.

Electrically insulated bearing featuring inner ring ceramic coating used in industrial screw air compressors

Screw Compressors

Large industrial screw air compressors are heavy users of insulated bearings. In compressor units such as the CSDX 165 or CSDX 215 (power approx. 90kW-132kW), the 6320/C3VL2071 is found at the NDE (tail end) of the core Siemens or WEG customized variable frequency main motor. Kaeser’s Sigma Frequency Control (SFC) technology generates high-frequency common-mode voltage. Located at the rear of the motor, the 6320 VL2071 interrupts the current path flowing toward the compressor airend, thereby protecting the extremely expensive screw airend bearings from erosion caused by electric discharge.

*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.

Q&A

Are TFL 6320 insulated bearings fully compatible with standard 6320 bearings?

Yes, they share the same dimensions (100 × 215 × 47 mm), so they can directly replace standard 6320 deep groove ball bearings.

What’s the difference between VL0241 and VL2071 suffixes?

VL0241 indicates outer-ring insulation, while VL2071 means the inner ring is insulated. Inner-ring insulation (VL2071) is preferable for applications with rotating outer ring or high-frequency currents.
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We’re more than a supplier; we’re a manufacturing partner with 20+ years of R&D experience. Speak with our engineers, and you’ll find our expertise can solve your electrical erosion issues and significantly reduce long-term maintenance costs.
 
Email: info@sdtflbearings.com
Address: Room 501, Building 1, No. 4567, Tangye Middle Road, Jinan, China

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We're more than a supplier; we're a manufacturing partner with 20+ years of R&D experience. Speak with our engineers, and you'll find our expertise can solve your electrical erosion issues and significantly reduce long-term maintenance costs.

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