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The 6218-M-C3-SQ77 is an electrically insulated ball bearing with a 90mm bore and 160mm outer diameter, designed to prevent electrical currents from passing through. It features a durable brass cage and can handle dynamic loads up to 101 kN.
Its outer ring has a special insulating coating (SQ77) with a breakdown voltage of 1000-3000V, making it ideal for electric motors or generators. The bearing operates smoothly at speeds up to 8500 RPM.
With a C3 radial clearance, it accommodates thermal expansion in demanding conditions. The coating thickness ranges from 100 to 500 µm, ensuring reliable insulation.
This model is RoHS compliant and weighs 2.2kg, suitable for industrial applications where electrical insulation is crucial, such as wind turbines or railway systems.
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How Is 6218-M-C3-SQ77 Bearing Engineered for Reliability?
6218-M-C3-SQ77 Bearing features an insulating coating on the outer ring, preventing electrical damage in high-voltage environments.
The brass cage ensures smooth operation and reduces friction, even at high speeds up to 8,500 r/min.
With a basic dynamic load rating of 101.0 kN, it handles heavy loads reliably.
The C3 radial internal clearance allows for thermal expansion, maintaining performance in varying conditions.
Industrial Uses of 6218-M-C3-SQ77 Bearing
6218-M-C3-SQ77 Bearing is commonly used in electric motors and generators, where its electrically insulated coating prevents current leakage and reduces bearing damage. The brass cage ensures smooth operation even under high-speed conditions.
In wind turbine applications, 6218-M-C3-SQ77 Bearing handles variable loads while maintaining electrical isolation, crucial for preventing arcing in sensitive components. Its C3 clearance allows for thermal expansion during prolonged use.
For industrial automation systems, 6218-M-C3-SQ77 Bearing’s high breakdown voltage makes it suitable for frequency-controlled drives. The coating’s consistent resistance ensures reliable performance in electrically noisy environments.
Where Is 6218-M-C3-SQ77 Bearing Used?
6218-M-C3-SQ77 Bearing finds its place in railway traction motors, where electrical insulation is vital for safety and longevity. The bearing’s robust design copes well with vibrations and shocks common in rail transport.
In medical imaging devices like MRI machines, 6218-M-C3-SQ77 Bearing’s non-conductive properties prevent interference with sensitive electronics. The precise dimensions ensure quiet operation essential for patient comfort.
Built for Heavy-Duty Use: 6218-M-C3-SQ77 Bearing
6218-M-C3-SQ77 Bearing works well in steel mill equipment, where high temperatures and electrical currents are present. The insulation coating withstands harsh conditions while maintaining performance.
For food processing machinery, 6218-M-C3-SQ77 Bearing’s brass cage resists corrosion from cleaning agents. The electrical isolation also prevents stray currents that could affect sensitive control systems.
Automotive vs Aerospace: Applications of 6218-M-C3-SQ77 Bearing
In electric vehicles, 6218-M-C3-SQ77 Bearing prevents current leakage in traction motors, extending component life. The C3 clearance accommodates thermal expansion during rapid acceleration.
For aircraft auxiliary power units, 6218-M-C3-SQ77 Bearing’s lightweight design and electrical insulation meet stringent aviation requirements. The high-speed capability ensures reliable performance at various altitudes.
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