FREE copy of the Uptime Elements Implementation Guide once you subscribe to Reliability Weekly

Most route-based vibration analysis is performed at the bearing cap locations. For trending, this is the most logical place to detect rotor and bearing faults. Keep in mind that the location that the vibration data is collected may not be the location of "highest" vibration. It also may not indicate the source of the problem.

As an example, many large feed water pumps have oil lubrication lines that can be excited into resonance during operation. When measured at the bearing locations, the vibration may increase to alarm levels. However, at the line itself, the vibration may be orders of magnitude higher. It's very frustrating to be trying to solve a problem when you don't have a good overall sense of the potential problem source.

Alternately, the measurement location(s) specified for trending may be the worst choice for indicating overall response levels. An example of this was a vertical pump system in a nuclear power plant that had a quarterly measurement location specified on the motor end bell that was resonant. The end bell was responding at much higher levels than a more stable housing location just inches away.

In each of these cases, a little investigation beyond the typical trending locations would have indicated the problem source. When in doubt, use your sense of touch and "walk" the machine, its mounts and foundations for changes in vibration level. Then take a few off-route measurements to get a better perspective. It might be time well spent.

Tip by Dan Ambre, P.E. [Modalguy]
Full Spectrum Diagnostics, PLLC

Upcoming Events

August 8 - August 10, 2023

Maximo World 2023

View all Events
80% of newsletter subscribers report finding something used to improve their jobs on a regular basis.
Subscribers get exclusive content. Just released...MRO Best Practices Special Report - a $399 value!
Internet of Things Vendors Disrupting the Asset Condition Management Domain at IMC-2022

Internet of Things Vendors Disrupting the Asset Condition Management Domain at IMC-2022 The 36th International Maintenance Conference collocated with the RELIABILITY 4.0 Digital Transformation Conference [East]

Asset Management Technology

The aim of the Asset Management technology domain is to assure that IT/OT systems are focused on creating the value from the assets and that the business can deliver to achieve organizational objectives as informed by risk.


TRIRIGAWORLD AWARDS honors excellence in space optimization and facility management, A event to further advance asset management

IMC-2022 Who's Who: The World's Best Run Companies

The International Maintenance Conference (IMC) provides a fresh, positive community-based curated experience to gain knowledge and a positive perspective for advancing reliability and asset management through people, their managers, the strategy, the processes, the data and the technology. The world’s best-run companies are connecting the workforce, management, assets and data to automate asset knowledge that can be leveraged for huge beneficial decisions.

Uptime Elements Root Cause Analysis

Root Cause Analysis is a problem solving method. Professionals who are competent in Root Cause Analysis for problem solving are in high demand.

Reliability Risk Meter

The asset is not concerned with the management decision. The asset responds to physics

Why Reliability Leadership?

If you do not manage reliability culture, it manages you, and you may not even be aware of the extent to which this is happening!

Asset Condition Management versus Asset Health Index

Confusion abounds in language. Have you thought through the constraints of using the language of Asset Health?

Seven Chakras of Asset Management by Terrence O'Hanlon

The seven major asset management chakras run cross-functionally from the specification and design of assets through the asset lifecycle to the decommissioning and disposal of the asset connected through technology

Reliability Leader Fluid Cleanliness Pledge

Fluid Cleanliness is a Reliability Achievement Strategy as well as an asset life extension strategy