July 28, 2008 -
Developed for field installation without disassembly of coupled equipment, AEGIS SGR Split-Ring Bearing Protection Kits(TM) are designed to provide clearance for shaft shoulders, slingers, and end-bell protrusions while protecting bearings from electrical damage caused by circulating or shaft currents. Standard-size kits fit NEMA-frame motors with shaft diameters from 0.625 to 3.375 in. as well as IEC frame motors with shaft diameters from 19 to 95 mm. Custom-size kits are also available.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
New Bearing Protection Ring Kits Speed Field Installations and Retrofits
MECHANIC FALLS, ME - To simplify predictive/preventive motor maintenance programs, Electro Static Technology has introduced two new AEGIS SGR Split-Ring Bearing Protection Kits(TM) - one for NEMA motors and one for IEC motors. Developed for easy field installation without disassembly of coupled equipment, these new Split-Ring kits are designed to provide clearance for shaft shoulders, slingers, and other end-bell protrusions while protecting bearings from electrical damage caused by circulating or shaft currents.
Kits include the new split-ring version of the SGR Bearing Protection Ring(TM). The ring prevents bearing damage by safely channeling shaft currents to ground. Its conductive microfibers provide the path of least resistance to the motor frame. Kits also include a sturdy aluminum mounting plate and all mounting hardware. When used by HVAC service contractors, motor repair shops, and plant maintenance departments, the SGR Bearing Protection Ring dramatically extends motor life and prevents bearing noise, downtime, and costly motor repairs/replacements.
Used increasingly to save energy, variable frequency drives (VFDs) induce currents on motor shafts which discharge through bearings, causing fusion craters on bearing race walls. Over time, this can lead to noise, vibration, bearing failure, and catastrophic motor failure.
Unlike conventional shaft grounding brushes, the SGR ring is maintenance-free and lasts for the life of the motor, regardless of RPM. It works with virtually no friction or wear and is unaffected by dirt, grease, or other contaminants.
Because the ring comes in halves and the mounting plate is U-shaped to fit around the motor shaft, both can be installed without disconnecting the motor from coupled equipment. Secured to the motor with three screws, the mounting plate has slots to accommodate different motor designs and covers less than ½" of the motor shaft.
Split-Ring Kits are ordered by motor frame size. Standard-size kits fit NEMA-frame motors with shaft diameters from 0.625" to 3.375" and IEC-frame motors with shaft diameters from 19mm to 95mm. Custom-size kits are also available.
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