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NKE Electrically Insulated Ball Bearings 6220-M-C3-SQ77

NKE Electrically Insulated Ball Bearings 6220-M-C3-SQ77

The NKE 6220-M-C3-SQ77 is an electrically insulated ball bearing with a 100mm bore and 180mm outer diameter, designed to prevent electrical currents from damaging machinery. It features a robust brass cage and a special outer ring coating for insulation.

With a dynamic load rating of 127kN and a static load rating of 93kN, this bearing handles heavy loads while maintaining smooth operation. It can reach speeds up to 7500 RPM, making it suitable for high-performance applications.

The insulating coating provides a breakdown voltage of 1000-3000V and electrical resistance of 50-200 MΩ, protecting against electrical arcing. Its C3 radial clearance ensures reliable performance under varying thermal conditions.

Ideal for electric motors, generators, and wind turbines, this RoHS-compliant bearing is a smart choice for applications where electrical insulation is crucial. Weighing 3.22kg, it balances durability with practical handling.

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Product Parameters

  • Model 6220-M-C3-SQ77
  • Product Category Electrically Insulated Ball Bearings
  • Insulating Coating Types Insulation coating on outer ring
  • Coating Suffix SQ77
  • Manufacturers NKE
  • Bore Diameter 100.0 mm
  • Outside Diameter 180.0 mm
  • Width 34.0 mm
  • Net Weight 3.22 kg
  • Basic Dynamic Load Rating 127.0 kN
  • Basic Static Load Rating 93.0 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 Brass cage
  • Radial Internal Clearance C3
  • ROHS Compliant
  • REACH Compliant
NKE Electrically Insulated Ball Bearings 6220-M-C3-SQ77 dimension drawing
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Features

How Is 6220-M-C3-SQ77 Bearing Engineered for Reliability?

6220-M-C3-SQ77 Bearing features an insulating coating on the outer ring, preventing electrical damage in high-voltage environments.
Its breakdown voltage ranges from 1000 to 3000 V, ensuring safe operation in electrically charged applications.

The brass cage maintains ball alignment, reducing friction and wear for smoother performance.
With a dynamic load rating of 127.0 kN, it handles heavy loads efficiently.

6220-M-C3-SQ77 Bearing’s C3 radial clearance allows for thermal expansion, enhancing durability.
The coating thickness of 100~500 µm provides consistent insulation and long-term reliability.

Operating at up to 7500 r/min, it balances speed and stability in demanding conditions.
Its electrical resistance of 50~200 MΩ ensures minimal current leakage.

Application

Ideal for Precision: 6220-M-C3-SQ77 Bearing
The 6220-M-C3-SQ77 Bearing is commonly used in industrial equipment like electric motors and generators, where electrical insulation is crucial. Its brass cage and C3 clearance ensure smooth operation even under varying loads.

In automotive applications, 6220-M-C3-SQ77 Bearing helps reduce electrical arcing in hybrid and electric vehicle components. The insulation coating prevents current passage, extending the bearing’s lifespan.

For medical devices, 6220-M-C3-SQ77 Bearing offers reliable performance in sensitive equipment like MRI machines. The high breakdown voltage ensures safety in electrically demanding environments.

Automation systems benefit from 6220-M-C3-SQ77 Bearing’s ability to handle high speeds without electrical interference. Its design is well-suited for robotic arms and precision machinery.

In household appliances, 6220-M-C3-SQ77 Bearing provides quiet and efficient operation in items like washing machines. The insulation coating adds an extra layer of protection against electrical damage.

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