Date: 2013-08-01

Shaft Grounding Ring Includes Mounting Adaptor

Shaft Grounding Ring Includes Mounting Adaptor


MECHANIC FALLS, ME - Electro Static Technology's AEGIS SGR(TM) Conductive MicroFiber(TM) Shaft Grounding Ring now includes a mounting adaptor to facilitate installation of the device on AC motors with shaft shoulders, slingers, bearing caps, or end-bell protrusions. Designed for use on any NEMA or IEC motor frame, the adaptor consists of a mounting plate to support the SGR and standoffs to provide clearance for bearing housings or slingers. Simple installation instructions are available online at www.est-aegis.com.

The new all-in-one package is ordered by motor frame size and dramatically simplifies installation of the AEGIS SGR Shaft Grounding Ring for electrical, mechanical, and maintenance contractors. It will also streamline installation of the SGR on new motors by OEMs. Secured with three mounting screws, the sturdy aluminum mounting adapter holds the SGR in place beyond the protrusion, and the entire assembly covers less than ½" of the motor shaft. Slots in the plate accommodate different motor designs and configurations, and the kit can be ordered with standoff posts from 0.125" to 1.5" in length.

When a variable frequency drive (VFD) is used to control the speed of an AC motor, current induced on the motor shaft by the drive discharges through bearings, causing fusion craters on bearing race walls. Over time, this can lead to noise, vibration, bearing failure, and catastrophic motor failure. The AEGIS SGR prevents bearing damage by dissipating shaft currents to ground. Conductive microfibers inside the SGR provide the path of least resistance, allowing these shaft currents to discharge safely to the motor frame. Maintenance-free, the SGR extends motor life. Unlike conventional shaft grounding brushes, the SGR's conductive microfibers work with virtually no friction or wear; are unaffected by dirt, grease, or other contaminants; and last for the life of the motor, regardless of RPM.

The patent-pending AEGIS SGR is available in standard sizes to fit NEMA motors with frames from 140T to 440T and IEC motors with frames from IEC80 to IEC315.

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