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Electrically Insulated Single Row Cylindrical Roller Bearings NU 311 ECM/C3VL0241

Electrically Insulated Single Row Cylindrical Roller Bearings NU 311 ECM/C3VL0241

The NU 311 ECM/C3VL0241 is an electrically insulated cylindrical roller bearing, sized at 55mm bore, 120mm outer diameter, and 29mm width. It weighs 1.73kg and is built with a robust insulation coating on the outer ring.
This bearing supports dynamic loads up to 68.2 kN and static loads of 86.5 kN, operating smoothly at speeds up to 6000 rpm. Its C3 radial internal clearance allows for thermal expansion in various conditions.
The insulation coating provides electrical resistance of at least 50 MΩ, protecting against currents up to 3000 VDC. A machined brass cage offers durability and reliable performance in demanding settings.
Suitable for electric motors, generators, and industrial machinery where electrical insulation is needed. Compliant with RoHS and REACH standards for safe and eco-friendly use.

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Product Parameters

  • Model NU 311 ECM/C3VL0241
  • Product Category Electrically Insulated Single Row Cylindrical Roller Bearings
  • Insulating Coating Types Insulation coating on outer ring
  • Coating Suffix VL0241
  • Manufacturers TFL
  • Bore Diameter 55 mm
  • Outside Diameter 120 mm
  • Width 29 mm
  • Net Weight 1.73 kg
  • Basic Dynamic Load Rating 68.2 kN
  • Basic Static Load Rating 86.5 kN
  • Reference Speed 6000.0r/min
  • Breakdown Voltage (DC) 1000 VDC to 3000 VDC
  • Layer Thic kNess 500 µm
  • Electrical Resistance Min. 50MΩ
  • Cage Material Machined brass
  • Radial Internal Clearance C3
  • ROHS Compliant
  • REACH Compliant
Electrically Insulated Single Row Cylindrical Roller Bearings NU 311 ECM/C3VL0241 dimension drawing
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Features

How Is NU 311 ECM/C3VL0241 Bearing Engineered for Reliability?

NU 311 ECM/C3VL0241 Bearing features an insulating coating on its outer ring, protecting against electrical damage.
This coating offers a breakdown voltage from 1000 to 3000 VDC, making it suitable for electric motor applications.
Its machined brass cage ensures stable roller guidance, which helps maintain performance under high dynamic loads.
With a basic dynamic load rating of 68.2 kN, it provides dependable operation in demanding industrial environments.

Application

Where Is NU 311 ECM/C3VL0241 Bearing Used?
NU 311 ECM/C3VL0241 Bearing is commonly fitted in industrial motors and generators, where its electrical insulation prevents current damage from stray voltages.
This makes it a reliable option for machinery in manufacturing plants that experience frequent power fluctuations.

In automotive electric drives, NU 311 ECM/C3VL0241 Bearing supports components like alternators and traction motors, handling radial loads while blocking electrical arcing.
The brass cage also contributes to smoother operation in high-temperature environments.

For automation equipment, NU 311 ECM/C3VL0241 Bearing’s C3 clearance allows for thermal expansion in robotic arms, maintaining precision during continuous cycles.
Its coating withstands up to 3000 VDC, which is useful in automated systems with variable frequency drives.

Q&A

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