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Machine Design

Shaft Grounding Ring

Aegis SGR Conductive MicroFiber Shaft Grounding Ring protects bearings from electrical damage. The 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 speed. A mounting kit simplifies installation on any NEMA or IEC motor and provides clearance for motors with shaft shoulders, slingers, bearing caps, or end-bell protrusions. Secured with three mounting screws and standoff posts, the entire assembly covers less than 0.5 in. of the shaft. The device also prevents bearing damage by channeling shaft currents to ground. Microfibers provide the path of least resistance, allowing shaft currents to discharge safely to the motor frame.

Electro Static Technology, Winterbrook Rd., Mechanic Falls, ME 04256, (207) 998-5140,

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