When monitoring your bearing lubrication with ultrasound, it is important to watch for very high values in your condition indicators ( total RMS and Peak values ). After applying grease, both values should decrease proportionately. This is a sign the bearing was under-lubricated. If the total RMS value lowers and the peak value stays relatively the same, then the bearing has a mechanical condition that is generating impacts.
In the opinion of the senior author, the Original Equipment Manufacturers (OEMs) do a credible job of designing, building, and installing bearings. Within the industrial end user community there seems to be an overt tendency to rede-sign, and continually attempt to improve on the OEM bearings. In multiple cases, the bearing redesign has rendered the machinery inoperative. In other situations, the operating speed range of the machinery has been severely limited following the installation of presumably improved bearings. In all cases, the machinery diagnostician must approach bearing problems carefully, and conduct a methodical engineering analysis of the problem. Specifically, the following items should always be thoroughly examined and in some cases re-examined:
Check that the oil console or reservoir contains the correct lubricant.
Check the oil quality for proper density, viscosity, water content, etc.
If President Donald Trump is able to renegotiate trade deals to be more U.S. friendly during his first 100 days in office, it is both good and bad news for American manufacturing. On the one
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Steven L. Blue is the President & CEO of Miller Ingenuity, an innovative company revolutionizing traditional safety solutions for railway workers, and author of the new book, American Manufacturing 2.0: What Went Wrong and How to Make It Right.
In a way, the existing arrangement at MSDGC WWT was in two tiers, one provided by an ACM/PdM services contractor and the other provided by in-house maintenance ACM/PdM practitioners. In
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Literally, tips are for focusing. You may be used to taking the rubber cones (six-inch cone or the smaller 1.5”-2”) to locate air leaks. You should only use the cones when you are trying to
We’ve heard many times that people don’t want to change. That may or may not be true. Indeed, Beta has found that people do want to change, if (1) they’re given compelling reasons for change,
Proper equipment function requires a properly aligned and balanced machine. Allowing a machine to operate with an unbalance condition can result in bearing damage, cracks, loose components and
A flawless effort is possible but only with adequate training. It is important that everyone, especially those immediately involved, know exactly what they are to do and how to do it.
The
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Time (min.)
Discussion
Agenda Review
5
What the training will address so that the work sampling project can be a success
Work Sampling - What it is and what it is not
5
Recognition of the possible past problems with this type of effort
To clear up misconceptions
To begin developing an understanding of what the work effort is all about
Explain and reinforce that it is not designed to find people problems. It is process problem focused.
Why Are We Doing It?
5
Overall productivity baseline data and future periodic reviews
An understanding of productivity problems to be addressed—process, not people
Discussion of a Valid Sample
5
Stress honesty. This is a very critical success factor for this effort
Also, timeliness of data submission
Sampling Procedure
10
Discussion of how the sampling procedure works. It is important that those to be sampled understand what to do and when to do it.
Identify who will be making the foremen contacts and where to submit the forms—the coordinator
Problems and what to do about them (see section 3.3)
Direct Category
5
Review all definitions for understanding so that observations are accurate
All plants have a maintenance backlog. If plants consistently have no maintenance backlog then it could be argued that they are either spending too much on maintenance, or they don’t have the ...
Many craftsmen and engineers have tried to balance a machine using a pencil to mark the shaft. Given a slow speed, large deflections, a steady hand and some nerve, this could have been
... - You can balance with a pencil if you have slow speeds, large deflections, and a steady hand.
A common mistake among companies is to fix problems as they occur rather than preventing those problems from happening. One opportunity for prevention is through the health of your lubricants. It has been estimated that most production organizations lose between 10 and 15% of their plants total maintenance budget each year due to downstream effects of poor lubrication. Although a robust PdM program will include condition feedback technologies such as oil analysis, vibration analysis, ultrasonic testing and infrared thermography, these tools provide data on a failure that has already begun. A precision lubrication strategy requires root cause elimination. Installing desiccant breathers, filtering new oil, and protecting your oil during transfer to your equipment are all ways to decrease the root cause of machine downtime.
This indicator examines the root causes of breakdowns and then investigates whether the root cause should have been detected as part of the preventive maintenance program. This provides an