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NKE Electrically Insulated Ball Bearings 6315-M-C3-SQ77

NKE Electrically Insulated Ball Bearings 6315-M-C3-SQ77

The 6315-M-C3-SQ77 is an electrically insulated ball bearing with a 75mm bore and 160mm outer diameter, designed to prevent electrical currents from damaging machinery. It handles dynamic loads up to 119 kN and operates smoothly at speeds up to 9000 RPM.

Its outer ring features a special insulation coating (SQ77) with a breakdown voltage of 1000-3000V, protecting against electrical arcing. The brass cage ensures durability and reliable performance under high loads.

With a C3 radial clearance, it accommodates thermal expansion in demanding conditions. Ideal for electric motors, generators, or any application where electrical insulation is crucial.

Weighing 3.12kg, it’s robust yet manageable for industrial use. Compliant with RoHS standards for environmental safety.

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Product Parameters

  • Model 6315-M-C3-SQ77
  • Product Category Electrically Insulated Ball Bearings
  • Insulating Coating Types Insulation coating on outer ring
  • Coating Suffix SQ77
  • Manufacturers NKE
  • Bore Diameter 75.0 mm
  • Outside Diameter 160.0 mm
  • Width 37.0 mm
  • Net Weight 3.12 kg
  • Basic Dynamic Load Rating 119.0 kN
  • Basic Static Load Rating 76.5 kN
  • Reference Speed 9000.0 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 6315-M-C3-SQ77 dimension drawing
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Features

What Makes 6315-M-C3-SQ77 Bearing Suitable for High-Temperature Applications?

6315-M-C3-SQ77 Bearing features an insulation coating on the outer ring, preventing electrical damage in high-temperature environments.
The brass cage enhances durability and ensures smooth operation under thermal stress.
With a breakdown voltage of 1000~3000 V, it safely handles electrical currents without compromising performance.
Its C3 radial internal clearance accommodates thermal expansion, maintaining reliability in demanding conditions.

Application

Industrial Uses of 6315-M-C3-SQ77 Bearing
This bearing is commonly used in electric motors and generators, where its electrically insulated coating prevents current passage and reduces damage from arcing. The brass cage ensures smooth operation even at high speeds.

Where Is 6315-M-C3-SQ77 Bearing Used?
You’ll find it in wind turbines and industrial drives, where electrical insulation is crucial for preventing bearing currents. Its C3 clearance allows for thermal expansion in demanding environments.

Built for Heavy-Duty Use: 6315-M-C3-SQ77 Bearing
In conveyor systems and pumps, this bearing handles heavy loads while maintaining electrical isolation. The SQ77 coating provides reliable insulation under varying voltage conditions.

Automotive vs Aerospace: Applications of 6315-M-C3-SQ77 Bearing
In automotive alternators, it prevents electrical damage, while in aerospace applications, its lightweight design and insulation are key. The high dynamic load rating ensures longevity in both sectors.

Perfect Fit for Automation: 6315-M-C3-SQ77 Bearing
Robotic arms and CNC machines benefit from its insulation, reducing downtime caused by electrical wear. The 9000 r/min speed rating makes it suitable for precision tasks.

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