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FAG Current-Insulated Single Row Cylindrical Roller Bearing NJ318-E-XL-M1-F1-J20AA-C4

FAG Current-Insulated Single Row Cylindrical Roller Bearing NJ318-E-XL-M1-F1-J20AA-C4

The FAG NJ318-E-XL-M1-F1-J20AA-C4 is a current-insulated cylindrical roller bearing with a 90mm bore and 190mm outer diameter, designed for heavy-duty applications. Its outer ring features a ceramic coating (J20AA) to prevent electrical arcing, with a breakdown voltage of up to 1000V.

This bearing handles dynamic loads up to 370 kN and static loads up to 350 kN, making it suitable for high-stress environments. The brass cage ensures smooth operation at speeds up to 3650 RPM, even in damp conditions where electrical resistance drops to 10MΩ.

With a C4 radial clearance, it accommodates thermal expansion in demanding settings. The 200-micron insulating layer and RoHS/REACH compliance make it safe for industrial use.

Ideal for electric motors or generators where current leakage must be avoided, this 6.3kg unit balances durability and electrical protection.

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Product Parameters

  • Model NJ318-E-XL-M1-F1-J20AA-C4
  • Product Category Current-Insulated Cylindrical Roller Bearing Single Row
  • Insulating Coating Types Outer ring ceramic coated
  • Coating Suffix J20AA
  • Manufacturers FAG
  • Bore Diameter 90.0 mm
  • Outside Diameter 190.0 mm
  • Width 43.0 mm
  • Net Weight 6.3 kg
  • Basic Dynamic Load Rating 370 kN
  • Basic Static Load Rating 350 kN
  • Reference Speed 3650r/min
  • Breakdown Voltage (DC) ≤1000v
  • Layer Thic kNess 200 um
  • Electrical Resistance 50MΩ (Dry); 10MΩ (Damp)
  • Cage Material M - Brass Cage
  • Radial Internal Clearance C4
  • ROHS Compliant
  • REACH Compliant
FAG Current-Insulated Single Row Cylindrical Roller Bearing NJ318-E-XL-M1-F1-J20AA-C4 dimension drawing
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Features

How Does NJ318-E-XL-M1-F1-J20AA-C4 Bearing Resist Electrical Current?

NJ318-E-XL-M1-F1-J20AA-C4 Bearing features an outer ring ceramic coating, providing effective insulation against electrical currents.
The coating offers a breakdown voltage of up to 1000V, ensuring reliable performance in electrically charged environments.

With a brass cage, NJ318-E-XL-M1-F1-J20AA-C4 Bearing maintains stability and reduces friction during operation.
Its C4 radial internal clearance allows for thermal expansion, making it suitable for high-speed applications.

The bearing’s dynamic load rating of 370 kN ensures durability under heavy loads.
Its ceramic coating also resists damp conditions, maintaining an electrical resistance of 10MΩ.

NJ318-E-XL-M1-F1-J20AA-C4 Bearing is designed for long service life with minimal maintenance.
The combination of ceramic insulation and brass cage makes it a reliable choice for industrial applications.

Application

Essential Roles of NJ318-E-XL-M1-F1-J20AA-C4 Bearing
NJ318-E-XL-M1-F1-J20AA-C4 Bearing is widely used in electric motors and generators, thanks to its current-insulating outer ring coating. This feature prevents electrical arcing, making it ideal for applications where stray currents are a concern.

In wind turbines, NJ318-E-XL-M1-F1-J20AA-C4 Bearing handles high radial loads while maintaining electrical insulation. Its brass cage ensures smooth operation even in demanding conditions.

For industrial pumps, NJ318-E-XL-M1-F1-J20AA-C4 Bearing offers reliable performance with its C4 radial clearance. The ceramic coating adds durability, especially in wet or humid environments.

In railway applications, NJ318-E-XL-M1-F1-J20AA-C4 Bearing’s high dynamic load rating makes it suitable for traction motors. The insulating properties help protect against electrical damage from rail currents.

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