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

According to most bearing manufacturers, over lubrication is a major cause of bearing failure. Over lubrication causes excessive loading which overheats the bearing, melting the lubrication, which in turn causes it to be thrown from the bearing - creating a lack of lubrication condition. This often results in bearing failure. If there is no release for the excessive grease, the pressure will cause a bearing failure. There have even been instances of electric motor a cavity being so full of grease; a short was created causing the entire motor to fail.

Most over lubrication is caused by lack of training, lack of awareness and lack of a written procedure. Some grease guns are calibrated for measured grease delivery and other feature digital gauges to track delivery.

Recently, acoustic or ultrasonic lubrication methods have become popular and offer an opportunity to prevent over lubrication. In some cases, proactive condition based lubrication is replacing the old time based lubrication procedures.

These devices "listen" to the sound of the bearing. Put simply, a properly lubricated bearing provides a smooth rushing sound heard the amplified audio signal in noise blocking headsets. Some units also feature digital meters to measure or trend sound level readings.

When a bearing lacks lubrication, a much rougher sound is detected and a technician can actually monitor the audiometer reduction and the sound level smoothing out as the grease comes into contract with the bearing.

There are two primary technologies available to accomplish the task of condition based lubrication monitoring. The first is a sonic or audible sound device. This device features a simple yet rugged stinger type metal contact probe connected to a grease gun mounted amplifier and control unit. Noise isolating headphones are supplied to block out ambient plant noise. This is the most popular unit as it is low cost, designed for ease of use (the only adjustment is volume) and can stand up to the most demanding environments.

The other unit's feature high frequency ultrasonic sensors, which also have numerous other plant applications, to detect, amplify and then translate or heterodyne the sound level into audible sounds, also heard through noise attenuating headsets. These devices are usually more sophisticated and include digital meters, data logging and software. They are multi-application instruments and are also used for leak detection, steam trap and valve testing as well bearing monitoring.

Both of these technologies have tremendous application, however, be cautioned as to the new sound monitoring procedure. I have read some manufacturers recommendations that would actually lead to over lubrication, even as you monitor the application of grease! Be sure and request a written procedure that the device manufacturer stands behind. It is a good idea to check with your bearing supplier as well as warranty issues may come into play and you want to ensure you remain covered.

Units are available in prices ranging from under $2,000 to well over $10,000. Training is usually offered by the vendor although a few independent training offerings are also available.

For more information, feel free to contact Terrence by email at tohanlon@reliabilityweb.com or visit us at IMC-2004 Dec 5-8, 2004 in Bonita Springs, Florida at www.maintenanceconference.com

Terrence O'Hanlon

Terrence O’Hanlon, CMRP, and CEO of Reliabilityweb.com® and Publisher for Uptime® Magazine, is an asset management leader, specializing in reliability and operational excellence. He is a popular keynote presenter and is the coauthor of the book, 10 Rights of Asset Management: Achieve Reliability, Asset Performance and Operational Excellence. www.reliabilityweb.com

Upcoming Events

August 8 - August 10, 2023

Maximo World 2023

View all Events
banner
80% of Reliabilityweb.com 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!
DOWNLOAD NOW
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 at MaximoWorld 2022

TRIRIGAWORLD AWARDS honors excellence in space optimization and facility management, A Reliabilityweb.com 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