Machinery Maintenance

STILL FRUSTRATED!!!

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By on March 21, 2019

Although we have many excellent blogs on the cause of non-repeatability, or more commonly known as frustration when attempting a precision shaft alignment, this issue continues to come up nearly every training session I conduct. And the number one cause? Not controlling backlash or looseness. All the trainers teach this and VibrAlign has a very […]

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Alignment Check vs. Alignment

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By on March 7, 2019

One question that arises regularly in training is about doing alignment checks. Is it okay to just check the alignment? Of course, it is. As a matter of fact, many industries have dedicated crews to specifically do alignment checks. The major difference is no equipment is moved, just measured. We lockout, remove guards, install the […]

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Balancing How To #2 – Selecting a Proper Trial Weight

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By on February 22, 2019

In our last Balancing How To, we discussed how to set up and get your original measurements on the rotor to be balanced.  This How To discusses selecting a proper trial weight. A trial weight is used to make a change in the original vibration amount and direction.  Changing either the AMOUNT of vibration (amplitude), […]

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A Vector Approach to Single Plane Balancing

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By on February 7, 2019

Unbalance (Imbalance) is often defined as the unequal distribution of the weight of a rotor about its rotating centerline. A rotor can be balanced either in-place or in a balancing machine assuming unbalance is the issue and weight can be added or removed.  Modern balancing instruments will do the math for you. I originally learned […]

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Balancing How To #1 – Setting Up for Balancing

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By on January 30, 2019

The recent blog on troubleshooting balancing ( https://vibralign.com/other-topics/smc-touch-tip-using-the-smc-when-unbalance-is-diagnosed/ ) brought up some additional questions from our readers, so let’s tackle them in order. The first one is setting up to perform a balance job. NECESSARY EQUIPMENT FOR BALANCING If you have gone through the checklist and confirmed unbalance, you will need: A machine to perform […]

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How to Read an Alignment Report Part 2 – Thermal Growth Targets

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By on January 23, 2019

The goal of a precision alignment is to align the machine within tolerance when at operating condition. Many, but not all, machines are aligned without the need to compensate for offline to running (OL2R) movement most often associated with thermal growth. A previous blog post (see link below) discussed how to read an alignment report […]

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Jack Bolts, Pushers, and Motor Movers

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By on January 16, 2019

A common source of frustration during the precision alignment process is, how can we make a controlled move when making the horizontal adjustment? We trainers often hear our clients say they don’t have jacking bolts, or pushers, etc. There have been numerous excellent blogs written on the subject of jack bolts. Pry bars, sledge hammers […]

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SMC Touch Tip-Using the SMC When Unbalance is Diagnosed

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By on January 7, 2019

The Fixturlaser Smart Machine Checker (SMC) is a great balancing tool (for me personally, it’s the best balancer I’ve ever used).  Unbalance is one of the most common machinery problems on rotating equipment, especially fans. If you get a diagnosis of unbalance, be aware of these tips: Be mindful that a rotating mass, once balanced, […]

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Here are the Top Maintenance Tips from VibrAlign Experts

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By on January 7, 2019

As you may have noticed if you follow VibrAlign’s social media accounts, we have been going through “Maintenance Tip Mondays” for the past couple months. This is a fun opportunity to hear from our experienced technical trainers as they share the top tips and tricks they have learned over the years in the field and […]

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Precision Shaft Alignment Preparation Ideas

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By on December 20, 2018

Preparation is the key to efficiency. Having an appropriate selection of tools and necessary supplies on hand will make a precision shaft alignment fast, accurate and easy. One way to do this is to have a dedicated alignment cart or job/work box. Some facilities are not conducive to the little casters on some carts, so […]

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How Do You Align Machinery on a Flexible Base?

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By on November 20, 2018

This is as much a title for a blog as it is a question. One our Technical Trainers once stated that to align rotating machinery, they must first be alignable. What is meant in part by this is that when we have a collinear tolerance of 0.5mil /1” angularity and 2.0 mils offset, the machines […]

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Collaborate

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By on November 14, 2018

This month marks my 41st year of being involved in industrial maintenance. Early on during my apprenticeship in a machine shop, as an outside machinist, I thought living long enough to know everything was not going to be possible. Even now I am reminded of this from time to time. I am also reminded that […]

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Mechanical Looseness Identification

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By on November 2, 2018

A common vibration signature on equipment is looseness. There are two types of looseness: structural/fastener, fit between rotating components. For this discussion, we will focus on structural and fastener looseness.  Typically, it is highly directional, occurs at 1xRPM, and will look similar to this spectrum. In this case, the vibration was confined to the vertical […]

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Know Your Alignment Tolerance

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By on October 15, 2018

VibrAlign and Fixturlaser have done what we can to make the precision shaft alignment process quicker and easier for the end user of our tools. To assist maintenance personnel during an alignment a tolerance table “pops up” on the display unit screen (of our tools) when entering dimensions for the machines being aligned. The tolerances […]

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Maintaining Engine and Compressor Crankshaft End Play (Thrust)

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By on October 3, 2018

Gas engines and reciprocating compressors, used in the gas compression industry, have a certain amount of crankshaft end play or thrust (as it’s commonly called). The amount of thrust is determined by the OEMs of the machines. The crankshafts of these machines must be able to “float” axially to prevent excessive/premature bearing wear. When new […]

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