In this case we have a gearbox with broken teeth. The gearbox bearings were showing a bit of vibration at running speed with harmonics. The vibration levels were unusually high...
The number one cause of failure in any mechanical application is contamination. Every industrial plant has a sizable investment in both its equipment and the lubricant that is purchased to protect that equipment...
Vibration monitoring on gearboxes is not obvious. Brand new gearboxes do have vibrations. Therefor putting alarm detection based on overall vibration levels often leads to false alarms or missed fault detection...
As the old saying goes, “Figures don’t lie, but liars do figure.” This is not to suggest that gear lubricant sales representatives are liars, but rather that too often neither the sales rep nor the purchaser completely understands what the numbers on a technical sheet or price list really mean...
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