Our 6319M/C4VL0241 electrically insulated bearing from TFL is fully interchangeable with premium branded insulation bearings like those from SKF, but offers better price competitiveness, lower MOQ for small lot buyers, faster logistics options, and more flexible customization including pre-lubrication, special coating specifications, and packaging options.
| TFL | SKF | FAG | NKE | NSK | NTN |
|---|---|---|---|---|---|
|
6319M/C4VL0241
|
6319M/C4VL0241
|
6319-M-J20AA-C4
|
6319-M-C4-SQ77
|
6319HDY2C3
|
7MC3-6319L1BC3
|
TFL’s 6319M/C4VL0241 combines reliable insulation performance with industrial-grade mechanical durability, delivering a long operating life in environments subject to high electrical stress, VFD control, and frequent startups. Every unit undergoes 100% megohmmeter testing to guarantee resistance between 1000V and 3000V. By combining the extra internal clearance (C4) needed for thermal expansion with our proprietary coating technology, TFL ensures your motor can withstand both the mechanical stress of high temperatures and the electrical stress from inverter currents.
Outer ring coated with high-resistance insulation to prevent stray current damage.
Brass machined cage for durability under industrial loads.
C4 internal clearance allows for thermal expansion in high-speed applications.
Electrically insulated bearings like the 6319M/C4VL0241 are typically used in settings susceptible to electric currents from inverters or generators. They prevent pitting, lubricant failure, and premature wear by interrupting stray currents.
The 6319M/C4VL0241 is frequently used on both the Drive End (DE) and Non-Drive End (NDE) of electric motors. It supports the load while insulating against shaft voltages that can cause surface erosion via electrical discharge. In ABB’s Baldor-Reliance EC Titanium motors (IE5 efficiency, used for industrial fans), this bearing insulates the NDE against common-mode voltage, reducing noise and extending service life in HVAC systems where temperatures rise during peak loads.
Inside centrifugal pumps, the 6319M/C4VL0241 provides radial stability and insulation to mitigate currents caused by speed control systems, preventing corrosion that leads to imbalance. Its C4 clearance is ideal for pumping warm fluids or operating in hot environmental conditions. In Sulzer OH overhung pumps (used in oil & gas), this bearing insulates the DE in API-compliant setups to fight electrical pitting during high-temperature hydrocarbon transfer, maintaining seal integrity through better thermal management.
For railway traction motors, the 6319M/C4VL0241 provides insulation against high-voltage inverters, preventing failure during dynamic operation. The C4 clearance is critical for handling the heat generated during braking cycles. In Siemens Desiro HC trains (regional service), this bearing is installed on the traction motor DE/NDE to insulate against regenerative currents. This ensures smooth acceleration up to 160 km/h, while the clearance prevents seizing across varying temperatures and reduces maintenance needs on commuter lines.
*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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