The company’s AEGIS SGR™ conductive MicroFiber™ shaft grounding ring 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. The all-in-one package is ordered by motor frame size and is said to simplify installation of the grounding ring for electrical, mechanical and maintenance contractors. The product is also said to 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 1/2 inch 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 inch to 1.5 inch in length. The shaft grounding ring is said to prevent bearing damage by dissipating shaft currents to ground. Conductive microfibers inside the unit provide the path of least resistance, allowing the shaft currents to discharge safely to the motor frame. The shaft grounding rings are said to be maintenance-free to extend motor life. Unlike conventional shaft grounding brushes, the conductive microfibers on the company’s unit are said to 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 units are available in standard sizes to fit NEMA motors with frames from 140T to 440T and IEC motors with frames from IEC80 to IEC315.
Electro Static Technology