Archive: December, 2011

Getting Pushy–Jacking Bolts Revisited

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By on December 29, 2011

Jacking bolts provide a smoother, easier way of moving machinery than using pry bars and hammers. Their use will almost always speed up the alignment process, prevent excessive minor moves back and forth, and generally make the task of shaft alignment much more pleasant. More and more companies are realizing the benefits of using jacking bolts […]

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Checking Your Thermal Targets

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By on December 21, 2011

Any equipment that goes through large temperature differences between startup and normal operation should have accurate thermal targets calculated to allow for proper shaft alignment. Shaft alignment data can be taken when the machine is at operating temperature and compared to readings taken when the machine is at ambient temperature. The resulting calculations provide alignment […]

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Meet VibrAlign Trainer, Stan Riddle – VIDEO

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By on December 16, 2011

My name is Stan Riddle, I’m a trainer for VibrAlign, I’ve been involved in aligning machinery for about 31 years. My background was as a machinist, and a tool and die maker. In the early 80’s I decided that I would get into maintenance because they would never computerize it, and I’ve been pulling wrenches […]

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Join Us in Houston

By on December 14, 2011

Our next monthly shaft alignment class for the Houston area will be on Jan. 24-25.

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Join Us in Richmond

By on December 14, 2011

Our next monthly shaft alignment class will be held in Richmond on Jan. 24-25.

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VibrAlign, Inc. Announces New Blog

By on December 14, 2011

Via PR Web the press release for the re-launch of our blog.

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Troubleshooting A Compressor Alignment

By on November 29, 2011

We’re going to try something different this week. We see some interesting stuff out there. We want you folks to troubleshoot this one. The OJT portion of a recent alignment training class involved checking the shaft alignment on an engine-driven reciprocating gas compressor. One of the great things about this part of the class is […]

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To Turn or Not to Turn, That is the Question!

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By on November 19, 2011

Bowl mills are used to pulverize coal prior to being blown into coal fired boilers. They are very large machines with heavy rotating components usually driven by an internal planetary gear set in the bottom of the mill. A typical steam generation power plant will have multiple bowl mills for each boiler in the facility. […]

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Stacking the Deck Can Get You in Trouble!

By on November 13, 2011

The photo to the right was taken at a recent training class. The maintenance guys at this facility were excellent aligners. They were adamant about getting their shaft alignments to “better than excellent” levels. They believed in preparing the surfaces of the base and the motor before installation. Their company spent thousands of dollars re-working […]

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Thermal Growth-What’s So Hot About It?

By on November 6, 2011

Engineering and technical people often use technical phrases that sound complicated. Thermal growth is one of those terms. It sounds like it could be an engineering marvel – one that would help us perform complicated alignments of high temperature, high speed machines. So, here’s the “secret” of thermal growth. When metal gets hotter, it gets […]

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Aligning Machines Mounted on Chocks

By on October 27, 2011

“Our large machines use adjustable chocks, instead of shims for correcting the vertical alignment; can we use the VibrAlign Verti-Zontal compound move with our Fixturlaser XA when correcting the misalignment?” Absolutely! Adjustable chocks are typically found on large machines such as the engine-compressor sets used in the gas compression industry.  The chocks are used in […]

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Thermal Growth Compensation – Growth Versus Targets

By on October 25, 2011

The object of precision shaft alignment is to position machines so that the rotational centers meet a specified tolerance at operating conditions. Machines can and will move due to temperature changes or process forces so this means that some machines need to be “misaligned” in their off line or cold condition so that they will […]

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Getting Started with Cooling Towers

By on October 17, 2011

Most every week during one of our alignment training classes, we’ll get a question about aligning cooling towers. Most facilities we visit have them and a lot of folks aren’t too sure how to approach the job. We’ll tackle the first step in this episode and explain a bit about roughing in the motor to […]

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Train-ing

By on October 8, 2011

A machine train alignment, one in which there are more than two machine components, and more than one coupling, may seem difficult to most aligners. But with some basic understanding, and the ability to “see the forest as well as the trees,” a machine train alignment can be performed accurately and quickly. We recently helped […]

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Why Should I Align A Flexible Coupling?

By on September 29, 2011

In a recent training class, a mechanic asked, “Why should I worry about aligning a flexible coupling? I thought the reason we used flexible couplings is because they didn’t have to be aligned.” That’s a great question, and one that deserves an honest answer. Let’s pick a commonly used coupling, and look at its alignment […]

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