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NKE Electrically Insulated Ball Bearings 6328-M-C3-SQ77E

NKE Electrically Insulated Ball Bearings 6328-M-C3-SQ77E

The 6328-M-C3-SQ77E is an electrically insulated ball bearing with a 140mm bore and 300mm outer diameter, designed to handle both radial and axial loads. Its ceramic-coated inner ring provides excellent insulation, preventing electrical damage.

With a dynamic load rating of 265kN and a static load rating of 245kN, it offers reliable performance under heavy loads. The brass cage ensures smooth operation at speeds up to 4800 RPM.

The C3 radial clearance allows for thermal expansion, making it suitable for high-temperature environments. The insulation can withstand voltages from 1000 to 3000V, ideal for electric motors and generators.

Weighing 22kg, this robust bearing is RoHS compliant and built for demanding industrial applications. Its electrical resistance ranges from 50 to 200 MΩ, ensuring safety in electrically charged settings.

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Product Parameters

  • Model 6328-M-C3-SQ77E
  • Product Category Electrically Insulated Ball Bearings
  • Insulating Coating Types Inner ring ceramic coated
  • Coating Suffix SQ77E
  • Manufacturers NKE
  • Bore Diameter 140.0 mm
  • Outside Diameter 300.0 mm
  • Width 62.0 mm
  • Net Weight 22 kg
  • Basic Dynamic Load Rating 265.0 kN
  • Basic Static Load Rating 245.0 kN
  • Reference Speed 4800.0 r/min
  • Breakdown Voltage (DC) 1000 ~3000 V
  • Layer Thickness 100~500 µm
  • Electrical Resistance 50~200 MΩ
  • Cage Material Brass cage
  • Radial Internal Clearance C3
  • ROHS Compliant
  • REACH Compliant
NKE Electrically Insulated Ball Bearings 6328-M-C3-SQ77E dimension drawing
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Features

How Is 6328-M-C3-SQ77E Bearing Engineered for Reliability?

6328-M-C3-SQ77E Bearing features an inner ring ceramic coating, providing excellent electrical insulation.
This design prevents electrical arcing, making it ideal for applications with stray currents.

The brass cage ensures smooth operation and reduces friction, even at high speeds.
With a reference speed of 4800 r/min, it delivers reliable performance in demanding conditions.

6328-M-C3-SQ77E Bearing’s basic dynamic load rating of 265.0 kN ensures durability under heavy loads.
Its C3 radial internal clearance allows for thermal expansion, maintaining stability.

The insulating coating offers a breakdown voltage of 1000~3000 V, enhancing safety.
This makes 6328-M-C3-SQ77E Bearing suitable for use in electric motors and generators.

Application

Industrial Uses of 6328-M-C3-SQ77E Bearing
This bearing is commonly used in electric motors and generators, where its ceramic coating prevents electrical arcing and extends service life. The brass cage ensures smooth operation even under high rotational speeds.

Where Is 6328-M-C3-SQ77E Bearing Used?
You’ll often find it in wind turbines and industrial drives, where electrical insulation is crucial to avoid damage from stray currents. Its C3 clearance allows for thermal expansion in demanding environments.

Built for Heavy-Duty Use: 6328-M-C3-SQ77E Bearing
With a dynamic load rating of 265 kN, it handles heavy loads in mining equipment and large conveyors. The ceramic coating also resists corrosion in harsh conditions.

Automotive vs Aerospace: Applications of 6328-M-C3-SQ77E Bearing
In automotive, it’s used in hybrid vehicle motors, while aerospace applications include auxiliary power units. The high breakdown voltage ensures reliability in both fields.

Perfect Fit for Automation: 6328-M-C3-SQ77E Bearing
Its precise dimensions make it ideal for robotic arms and CNC machinery. The electrical insulation prevents interference with sensitive control systems.

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