INSOCOAT bearings

  • Electric motors, generators and related equipment are at risk when current passes through the INSOCOAT bearings. This can damage the contact surfaces of rolling elements and raceways in bearings (galvanic corrosion) and rapidly degrade the grease.
  • Another risk for motors and generators comes from the high frequency currents caused by the inherent stray capacitance. The risk of damage is increased in applications where inverters are used.
  • INSOCOAT bearings are designed to prevent current from passing through the bearing. They are coated with an insulating aluminum oxide layer on the outer surface of either the inner or outer ring, using a sophisticated plasma spraying process to achieve excellent surface finish quality.
  • This solution is very cost effective compared to other insulation methods.
INSOCOAT bearings

Product types

  • The standard assortment of INSOCOAT bearings listed here constitutes the most commonly used sizes and variants of:
  • Single row deep groove ball bearings
  • Single row cylindrical roller bearings
  • For bearing types and sizes not listed in the product tables (Deep groove ball bearings, Cylindrical roller bearings), contact SKF.
  • For applications where smaller bearings than those listed are needed, SKF recommends using SKF Hybrid bearings.
  • In addition to the standard assortment, SKF can supply special INSOCOAT bearings and bearing units with complex ring geometries, such as:
  • Four-point contact ball bearings
  • Flanged tapered roller bearings
  • Tapered roller bearing units (TBU)
  • Traction motor bearing units

Features and Benefits

  • Protection against galvanic corrosion
    With insulation characteristics integrated into the bearing, INSOCOAT bearings can improve reliability and increase machine uptime by virtually eliminating galvanic corrosion problems.
  • High resistance
    The aluminum oxide coating has a minimum resistance of 200 MΩ and can withstand voltages of up to 3 000 V DC.
  • Consistent electrical performance, etc.
    Ionic spray coatings are usually hygroscopic and therefore prone to penetration due to condensation. To prevent this effect, INSOCOAT bearings are treated with a unique sealant.


  • The following are examples of applications where INSOCOAT bearings may be used.
  • Railroads
  • Electric motors and generators
  • Wind energy
  • Construction
  • Industrial pumps
Applications of W 618/0.6 Bearings
Applications of Bearings
Wind Turbines
Applications of Bearings
Steel Industry
Applications of Bearings
Applications of Bearings
Food Processing Machinery
Applications of Bearings
Applications of Bearings
Mining & Construction
Applications of Bearings
Electric motors and generators


Loads are defined by their direction. Loads perpendicular to the shaft are called radial loads and loads parallel to the shaft are called axial (thrust) loads.

Successful mounting is critical to the life cycle of your bearing. Proper bearing dismounting can safeguard other machine components and maintenance workers.

  1. The bearing is at the heart of all rotating equipment, and the condition of the bearing often reflects how well a machine is running.
  2. Learn more about bearing damage and bearing failure – and how to prevent it.

Sure, free samples are available for stock products if you can pay for the shipping cost.

We have regular stock for standard bearings that can be shipped right after your payment. It will take 15-60 days for new production order,which depends on your order quantity.

  1. All our bearings are 100% inspected strictly before packing.
  2. If any defective products received, please provide photos and video to show us the problem and help us improve the quality.
  3. New products will be sent to you as replacement if the probelm is product quality.
Chat with us
Chat with us
Questions, doubts, issues? We're here to help you!
None of our operators are available at the moment. Please, try again later.
Our operators are busy. Please try again later
Have you got question? Write to us!
This chat session has ended