Only AEGIS Warranties Motor Bearings Against Fluting

Variable frequency drives cause electrical damage to motor bearings.  This damage can lead to bearing fluting and premature bearing failure, raising maintenance costs and possibly causing unplanned downtime.  Today, several products are available that claim to reduce or prevent this electrical bearing damage.  But only one bearing protection device comes with a warranty against bearing fluting damage: the AEGIS® Shaft Grounding Ring.

The AEGIS 2-Year Extended Warranty applies to all ac induction motors with AEGIS rings installed according to best practices.  It applies whether the motor is new or used, or the ring was installed in the factory or the field.  The manufacturer, Electro Static Technology, guarantees that the motor bearings will not fail from electrical fluting damage.

motorsFor motors with retrofit AEGIS rings, the warranty is good for two years.  And for new motors with AEGIS rings factory-installed, the warranty is good for the two years after the motor manufacturer's warranty has expired.  Motor manufacturers' warranties on bearings vary, but whenever their warranty expires, the AEGIS warranty kicks in.

To be eligible, the user only needs to have a properly installed AEGIS ring and to register the motor.  If the motor develops bearing fluting during the term of the warranty, Electro Static Technology will:

  • Pay the Vaughen's National Average Price for "Furnish/Install 2 Standard Ball Bearings"
  • Supply a new shaft grounding ring (SGR or PRO, as appropriate)
  • Provide conductive colloidal silver shaft coating (AEGIS P/N CS015)

Best practices for bearing protection can be found here or in the AEGIS Bearing Protection Handbook (sign-in required).

So when the time comes to choose bearing protection for your next motor, ask yourself:  Of all of the products to choose from, which ones back up their promises with a warranty?  Only the makers of AEGIS Shaft Grounding Rings are that confident.  And with AEGIS, you can be, too.


AEGIS Rings also come with a 2-year extended warranty against bearing fluting damage. No other form of protection against VFD-caused bearing damage offers a warranty like this.

2-Year Extended Warranty

To learn more about AEGIS shaft grounding and best practices for electrical bearing protection, sign up for a training. We offer monthly live training webinars, and - pandemic restrictions permitting - we can also visit your facility to review your exact application.

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