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In This Issue
| - Where to Sample for Wear Debris
- Complimentary eBook: Fix The Weak Link! A Guide To Proper Oil Sampling
- How to Determine Bearing System Life
- Why Oils Deteriorate in Service
- How Low Temperatures Affect Grease
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| Where to Sample for Wear Debris |
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| When it comes to wear metal trending, it is a mistake to sample downstream of filters, which allows important data to be stripped from the oil prior to sampling. Equally undesirable is the common practice of sampling large centralized reservoirs such as with steam turbines, paper machine lubes and hydraulic systems. The large volumes of oil in these tanks will dilute wear metal concentrations to levels often below instrument detection limits. Sampling live-zone return lines and bearing drain headers is greatly preferred.
Join us in Nashville, Tenn., on Feb. 25-27 for
Machinery Lubrication training.
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| Understanding and determining bearing life is even more important today than in the past. With improved bearing manufacturing and steel processing along with advanced lubrication technology, the potential improvements in bearing life can be as much as 80 times that attainable in the late 1950s or as much as 400 times that attainable in 1940. Learn how the causes for bearing removal and failure can be minimized and/or mitigated by good bearing design, proper bearing installation, timely maintenance and good lubrication practices. |
FULL STORY
Question: Apart from chemical breakdown, why might oils deteriorate in service?
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GET THE ANSWER
From "Grease Lubrication in Rolling Bearings":
With decreasing temperature, the tendency of grease to bleed decreases and the stiffness (consistency) of the grease increases. This may ultimately lead to an insufficient supply of lubricant to the contact surfaces of the rolling elements and raceways so the lubricating action of the base oil can be neglected for low temperatures. It will be the grease in its totality that will lubricate. Low temperatures will result in a high torque, which may cause slippage of the rolling elements and therefore wear. This point is called the low temperature limit (LTL). |
Read more about "Grease Lubrication in Rolling Bearings"
Poll Question: Have you seen the effects of using the wrong oil in any machines at your plant?
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