An Original Equipment Manufacturer (OEM) reported having issues with the Lovejoy SX6 Disc Coupling, specifically citing that a coupling vibration existed and it appeared to be leading to premature bearing failure on a 250Hp AC Motor driving a Blower.
|Lovejoy SX6 Disc Coupling|
The prevailing North American industry bore standard (ANSI/AGMA 9002-B04), used by Lovejoy, is to supply hubs with a chamfer key slot in order to reduce the stress on the hubs. Unfortunately, the square key used by was distorting the hub enough to make the coupling unbalanced. Once an ANSI/AGMA 9002-B04 compliant shaped key was used, the problem went away.
The Lovejoy OEM disc coupling user now requires all keys provided by motor manufacturers to be made with a chamfer per ANSI/AGMA 9002-B04.
About the Author: Jim Mabrey has many decades experience in the mechanical power transmission industry and has been a longtime supporter and champion of Lovejoy coupling solutions. To find a Lovejoy representative in your neck of the woods, please visit Lovejoy's Sales Representative Search Tool.