Machinery Diagnostics

Using Bearing Defect Factor for Gear Defect Detection

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By on October 12, 2017

Bearing defect factor is a culmination of two technologies used for shock detection.  DEF is designed as an indicator for bearing defect detection, but can also be valuable in the detection of gear defects. Why is DEF significant? In the following data set are displayed Overall Vibration Velocity, Overall Acceleration, and Defect Factor.  The Overall […]

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The First Rule in Precision Shaft Alignment is “Don’t Assume”!

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By on October 6, 2017

This is an obvious statement and most of us know what happens when we do “ASSUME” with most things in life. However, we (The VibrAlign Trainers) see assumptions being made quite often during a precision shaft alignment. Several years ago, I read a book titled “A Millwright’s Guide to Motor/Pump Alignment” by Tommy “T-Hammer” Harlon […]

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One Resolution to Motor Resonance

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By on September 28, 2017

A customer was experiencing high levels of vibration on one of the HVAC motors. The cause for these high vibration levels was determined to be resonance. Resonance of this motor was seen in the vibration spectral data and was confirmed onsite with a bump test. This motor was not VFD driven and therefore the machine […]

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Vibration Sensor Mounting Tips

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By on September 13, 2017

A vibration sensor (or accelerometer) measures vibration-simple, right?  But how and where you mount the sensor is CRITICAL to getting good information.  Here are some good tips to keep in mind. 1. Mount the sensor as close to the bearing location as you can safely do it. These sensors can measure vibration anywhere on the […]

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Fire Pump Maintenance

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By on August 30, 2017

Fire Pumps are a critical safety item in facilities across the world. Their purpose is to make sure a building has enough water pressure in case of a fire emergency. Of course, the hope is that they are never needed but if they are they need to perform reliably. Fire Pumps are typically tested on […]

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BEFORE and AFTER: The Effect on Vibration Levels

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By on August 24, 2017

One of the most enjoyable parts of precision shaft alignment training for me as a trainer, is the field portion. This provides the opportunity to build confidence that what the students learn in the classroom, really works in the field! In a recent Fixturlaser GO Basic class, the decision was made to align two recently […]

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Precision Alignment and Balance isn’t Important – Unless you care about budgets and the reliability of your rotating assets.

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By on August 16, 2017

I read an interesting article in the June/July 17 issue of Uptime Magazine. It was titled “The Reliability Impact Within the P-F Curve” by Randy Riddell. Randy is the Reliability Manager for the SCA Barton Mill in Alabama. I encourage you to read the full article (https://reliabilityweb.com/articles/entry/the-reliability-impact-within-the-p-f-curve). The article includes the following graphic that I […]

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Pump Vibration – Even Cavitation Isn’t Always Cavitation!

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By on August 2, 2017

Most people who work on, or around pumps are familiar with the term “cavitation”.  It is often used as a catch all phrase for any flow-related vibration on pumps, and is often reported by vibration analysts when: Pump noise level is high, Pump vibration is erratic, with lots of “noise” in the spectrum. But there […]

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TROUBLESHOOTING MOTOR UNBALANCE

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By on June 20, 2017

Electric motors are almost always well-balanced when they leave the motor manufacturer.  But occasionally, motor unbalance problems are picked up with vibration monitoring tools, such as the OneProd Hawk. Here are some easy troubleshooting methods to determine the cause of unbalance in the motor. An electric motor’s rotor, like any rotating mass, cannot become out […]

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Setting Up a Motor-Gearbox for Vibration Measurement

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By on May 25, 2017

Gearboxes are common in industry.  They are used to increase or decrease speed from the driver, provide increased torque, and change direction of power transmission.   There are two main types of commonly-used gearboxes:   GEARBOX TYPE Parallel or Standard Gearbox-one where the input and output shafts are parallel. Bevel or Right Angle Gearbox-one where […]

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Calculating Output Speed Using Pulley Diameters and Input Speed

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By on May 10, 2017

Knowing the correct shaft speed of both shafts on a belt-driven machine is important when performing machinery diagnostics. Ideally you would do this by first identifying the input and output speeds using a strobe light, photo tach or laser tach. Once you know the accurate speed of both components, use this formula to determine the […]

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Precision Shaft Alignment of Machines With Small Diameter Shafts

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By on April 27, 2017

A VibrAlign customer recently called, stating they were having repeatability problems with aligning a small motor to gearbox to pump.  After some phone conversation, I asked if they could send me photos of the machine, and the discrepancy in the measurements.  After seeing them, I knew what the problem was.   Machines with small diameter […]

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Maintenance Strategies: Part Four – Proactive Maintenance

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By on March 16, 2017

Proactive Maintenance includes a number of maintenance strategies, such as Precision Maintenance, Reliability Based Maintenance, Reliability Centered Maintenance, and Root Cause Failure Analysis. The idea is to anticipate and solve problems before they become problems. Reliability Centered maintenance would begin with a study done on a piece of equipment to gain understanding of all its […]

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Maintenance Strategies, Part Three – Predictive Maintenance

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By on February 21, 2017

Predictive Maintenance, also known as Condition Based Maintenance or affectionately known as “if it ain’t broke, don’t fix it” also has its own set of pro’s and con’s. The pro’s: Rotating equipment usually gives warning signs before failure. Vibration level or pattern changes, rise in temperature, wear detected via oil analysis, performance change, motor current […]

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So You Got Your New HAWK! Let’s Set it Up.

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By on February 15, 2017

So you received your new OneProd HAWK Supervisor or HAWK Supervisor with Balancing.  There are some steps to follow to insure your instrument is configured correctly. Nest Set-up:  You will need to make sure you are using only Microsoft Internet Explorer 8 (or higher) for the first connection and you will need to download MS […]

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