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6318/C3VL0241 Electrically Insulated Ball Bearings

6318/C3VL0241 Electrically Insulated Ball Bearings

The picture shows an electrical insulated bearing 6318/C3VL0241. Its outer ring has an insulating coating and the cage is made of steel.
The picture shows an electrical insulated bearing. Its outer ring has an insulating coating and the cage is made of steel.
The picture shows an electrical insulated bearing. Its outer ring has an insulating coating and the cage is made of steel.
The picture shows an electrical insulated bearing. Its outer ring has an insulating coating and the cage is made of steel.
The picture shows an electrical insulated bearing. Its outer ring has an insulating coating and the cage is made of steel.
The picture shows an electrical insulated bearing. Its outer ring has an insulating coating and the cage is made of steel.

6318/C3VL0241 Electrically Insulated Deep Groove Ball Bearing for Global OEM and MRO Users

  • Advanced Electrical Insulation: Protects against damaging electrical currents, preventing premature bearing failure.

  • Broad Application Versatility: Ideal for a wide range of industrial equipment, including motors, generators, and wind turbines.

  • C3 Clearance: Provides internal clearance suitable for applications with thermal expansion or slight misalignments.

  • Compatibility: Designed as a direct replacement for major brands, ensuring seamless integration into existing systems.
$ 300 /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 6318/C3VL0241
  • Equivalent Interchange 6318/C3VL0241 (SKF); 6318-J20AA-C3 (FAG); 6318-M-C3-SQ77 (NKE); 6318HDY2C3 (NSK); 7MC3-6318C3 (NTN)
  • Product Category Electrically Insulated Ball Bearings
  • Coating Suffix VL0241
  • Insulating Coating Types Insulation coating on outer ring
  • Manufacturers TFL
  • Bore Diameter 90.0 mm
  • Outside Diameter 190.0 mm
  • Width 43.0 mm
  • Net Weight 4.9 kg
  • Basic Dynamic Load Rating 151.0 kN
  • Basic Static Load Rating 108.0 kN
  • Reference Speed 7500.0 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
6318/C3VL0241 Electrically Insulated Ball Bearings Drawing.dwg
Download DWG Download PDF

6318/C3VL0241 Equivalent Interchange Brands

Looking for a reliable alternative to premium brands like SKF or NSK for your 6318/C3VL0241 insulated bearing needs? TFL provides a perfect balance of quality and value. Our bearings meet or exceed the performance specifications of the original parts but come with significant advantages for your business. You can expect more competitive pricing, greater flexibility with lower MOQ, and faster logistics support.

TFL SKF FAG NKE NSK NTN
6318/C3VL0241
6318/C3VL0241
6318-J20AA-C3
6318-M-C3-SQ77
6318HDY2C3
7MC3-6318C3

Why Choose TFL 6318/C3VL0241 Electrically Insulated Bearings?

Stray currents in electric motors and other powered equipment can cause premature bearing failure through a process called electrical discharge machining (EDM). TFL’s 6318/C3VL0241 bearings are specifically engineered to prevent this. The durable alumina coating on the outer ring acts as a barrier, insulating the bearing and protecting it from current-induced damage.

The picture shows an electrical insulated bearing 6318/C3VL0241. Its outer ring has an insulating coating and the cage is made of steel.

Features of 6318/C3VL0241

  • Ceramic-coated outer ring with high insulation resistance
  • Optimized C3 clearance for high-speed electric motors
  • Matches ISO dimensions strictly, 90x190x43 mm
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Common Applications of Electrically Insulated Bearings

Electrically insulated bearings are commonly used in applications where variable frequency drives (VFDs) or high-voltage systems may induce stray electrical currents, leading to premature bearing failure through electrical erosion or pitting. The insulation coating acts as a barrier that prevents current from passing through the bearing, thereby extending service life, reducing downtime, and improving overall system reliability in motors, pumps, generators, and other rotating equipment.
electrically insulated bearing used in Siemens 1LE1 severe duty motor non-drive end

Electric Motors

The 6318/C3VL0241 is critical for preventing premature failure in VFD-driven motors, where high-frequency currents are common. For example, in Siemens SIMOTICS SD motors, particularly the 1PS0 series (frame size 450), this bearing is frequently installed at the non-drive end (NDE). The insulated outer ring interrupts the bearing current path, preventing the formation of fluting patterns that can cause noise and bearing seizure.
the image shows a petrochemical process pump and a deep groove ball bearing for pumps

Industrial Centrifugal Pumps

Large water treatment facilities often use variable-speed drives to control pump flow, which can generate shaft voltage. In Grundfos NKG series ISO end-suction pumps coupled with heavy-duty motors (typically 200 kW and above), the 6318/C3VL0241 serves as a critical barrier between the motor shaft and the bearing housing. Without this insulation, current would discharge through the rolling elements, leading to grease degradation and raceway damage.

Durable insulated bearings for wind turbine auxiliary motors

Wind Turbine Generators

Auxiliary motors and cooling fans in wind turbines rely on robust medium-sized bearings such as the 6318. In platforms like the Vestas V90 or similar turbine designs, generator cooling fans or blowers are commonly VFD-controlled to adjust cooling based on load conditions. The 6318/C3VL0241 is used to support the fan motor shaft. Using a high-reliability insulated bearing ensures that cooling system maintenance intervals align with those of the main turbine components.

*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

What is the difference between the VL0241 and VL2071 suffixes?

The difference lies in the location of the insulation coating. VL0241 indicates that the electrical insulation layer is applied to the outer ring, which is the most common configuration. VL2071 indicates that the coating is applied to the inner ring. We offer both types, including variants such as 6318/C3VL2071, depending on your housing design and shaft grounding requirements.

How should electrically insulated bearings be installed and maintained?

Handle the bearing carefully to avoid damaging the ceramic coating. Ensure that the shaft and housing are clean and free of burrs. Use standard installation tools, but apply mounting force only to the ring being press-fitted—preferably the non-insulated ring. Most importantly, the insulated ring must not be grounded. Avoid creating any electrical bridging paths between the insulated ring and its mating surface, such as conductive grease films. For maintenance, periodic monitoring of vibration and temperature is recommended.
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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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