Exciting New Partnership Announcement for LUDECA and TM Induction Heating

September 13, 2017

We are thrilled to announce we have teamed up with TM Induction Heating in the Netherlands to bring to the US market the SURETHERM line of induction heaters —a new generation of low frequency and highly efficient induction heaters for a wide range of applications. With 25 years of experience, TM Induction Heating is the industry leader in safe heating processes offering standard as well as custom solutions with  both bench top and floor stand models. Heat work pieces safely and efficiently with precise temperature control and automatic demagnetizing with real-time feedback and heating cycle graphs.

We are excited by the opportunity to partner with TM Induction Heating. Their induction heaters are the perfect complement to our alignment, ultrasound and vibration tools as they support your quest for reliability in preventing premature bearing failures from improper installation —Ana Maria Delgado, Marketing Manager of LUDECA.

Bernd Seidenthal, Assistant Vice President LUDECA and Tim Loedeman, CEO TM Induction Heating

TM’s SURETHERM heaters can help eliminate induced bearing defects from poor fitting and improper mounting techniques. TM’s innovative dual sensor temperature mode allows for 100% tension free heating of the workpiece independent of size or diameter. In addition to bearings, SURETHERM heaters can be used to precisely heat and shrink fit couplings, rings, sprockets and pulleys without inducing uneven loading or stress.

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Which Condition Monitoring Technologies Should You Use?

September 12, 2017

Condition Monitoring Expert Tip #1 by Mobius Institute

This tip is sponsored by IMVAC (International Machine Vibration Analysis Conference)

How do you decide which condition monitoring technologies to use?

There are many condition monitoring technologies that we could employ. And within each technology there are sub-technologies. For example, within vibration analysis we can use high frequency analysis, spectrum analysis, time waveform analysis and phase analysis. Within each sub technology there are settings we must select. For example, we must set the frequency range when collecting spectra. But which technologies should we use? Which settings are correct? The best way to make those decisions is by understanding the failure modes of the equipment.

If you understand what leads to failure, and what is likely to fail, you can select the most appropriate technologies and settings. You may argue that that is an obvious statement to make. You are probably not using vibration analysis on your steam traps… But after 30 years of experience in vibration analysis, it is common to see that fault conditions a totally missed because of the misapplication the technology.

It is not necessary to perform a full RCM (reliability centered maintenance) or FMEA (failure modes effects analysis) to make this determination. A so-called “accelerated RCM” is sufficient to ensure that you make the right decisions.

Special thanks to Mobius Institute for allowing us to share this condition monitoring expert tip with you!

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Poor Installation Makes Sheave Alignment Impossible!

September 5, 2017

Guest post by Bob Dunn at I&E Central, Inc.

I was working with a customer to align sheaves using their Easy-Laser E180 sheave alignment tool. This is a new blower that had been installed by a contractor. Obviously the contractor did not check alignment before drilling the mounting holes. The horizontal angular error was about 1.25 degrees, and required a move of about 1/4″ more than was available given the placement of the bolt holes. Thanks to the digital measurement of the E180, they knew exactly what correction was needed at the feet to align this machine.

Unfortunately, the solution will be to drill out the holes in the base, then complete the alignment. What should have been a 30 minute job now becomes a much larger project – time and money wasted. My guess is that the contractor checked alignment with a string (or maybe not), which did not get him close enough. Using the right tools makes the difference.

Thanks to Bob Dunn for sharing this case study with us!

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How to Determine a Vertical Pump’s Natural Frequency

August 29, 2017

There are two commonly used testing methods to determine a vertical pump’s natural frequency. The first method is called a startup or coast down. In order to perform this method a tach signal is required for the speed to be tracked.  The pump is started and the amplitude and phase are recorded during start-up and coast down, however when a pump is started across the line (connected directly to a power source without a drive or soft-start circuit) it is very difficult to use this method.  The problem is that when a pump is started across the line it goes from zero rpm to full speed so quickly that there is not enough time to obtain valid data.   The coast down method is not normally successful in these cases. When the stop is initiated the pump comes to a complete stop in a very short period of time as the liquid inside the pump column falls back to the wet well acting as a brake. However start-up and coast down testing can be performed successfully if a pump is being operated using a VFD (Variable Frequency Drive) as the rate of speed can be controlled.

The other method of determining structural natural frequencies on a vertical pump is to conduct an impact test. This test is more commonly known as a bump test.  This test requires that the pump be stopped and impacted using a block of wood or a large hammer that has a soft tip (modal hammer).  The bump test provides a response curve that will identify the natural frequency and/or frequencies of the pump.  It is recommended that the testing be performed in two separate directions.  One direction would be in-line with the pumps discharge pipe and the other direction should be 90 degrees from the discharge pipe.  The two different directions will usually result in two different natural frequencies as the pumps discharge pipe tends to stiffen the structure. This vibration data can be shown as a higher natural frequency from that direction.  The other direction which is 90 degrees from the pump discharge will usually have a lower natural frequency. This is due to the fact that the pump manufacturers typically cutout part of the structure. This allows access to the coupling or seal which also dampens the structure in that direction.

Both of the mentioned methods can assist with discovering the natural frequencies of a pump. Once the frequencies have been identified on the pump; the proper corrections can be made to make certain that the pump is not operating on a resonance frequency.

Learn more about our Condition Monitoring tools

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Precision Maintenance: Belts, Chains, and Sprockets

August 22, 2017

Guest post by Brandon Weil, CMRP at Eruditio LLC

Belts, chains, and sprockets, chances are you have at least one if not all of these in your facility, and chances are you’re relying heavily on experience and judgment instead of quantitative inspection criteria. All too often the importance of proper inspection techniques and defined replacement criteria for these critical parts are overlooked. Don’t believe me? Just pull up some of your PM inspection procedure, discuss the topic at a tool box meeting, or observe someone performing the inspection, you might be surprised at the range of answers and opinions. If there isn’t a specific measurement or min/max criteria, then you’re leaving the inspection up to chance. Another thing to consider is if these parts aren’t being installed properly in the first place you will undoubtedly see premature failures and reduced operational life. Precision maintenance installation tools such as laser alignment for shafts, pulleys, and chains make a world of difference in preventing the introduction of infant mortality related failures like premature bearing failures, belt and pulley wear, etc.

The good news is that you can start improving the quality of your preventative maintenance inspections almost immediately; all you need are a few basic low-cost tools [Click Here] and you will find a document with inspection criteria for these three parts to get you started. Improving your PM inspection procedure, putting the right tools in the right hands, and setting quantitative standards for your inspection is a very low-cost high-return activity that can start paying dividends today.

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