Posts tagged with: “jacking bolts”

Precision Shaft Alignment with Adjustable Chocks

| | |

By on May 17, 2017

We have written, here on the VibrAlign blog, about adjustable chocks used in place of shims for vertical adjustment and machine support. A recent experience at a customer site prompted this article, to share a simple tip that could save valuable time and effort. The customer was using vertical jack bolts while viewing live alignment […]

Read More

Back Off Jack Bolts for Improved Alignment Results

| | | | |

By on December 14, 2016

Millwrights and mechanics know the benefits of using jack bolts to precisely control the horizontal position of the movable machine when performing a precision shaft alignment. However, we also see the tendency to tighten the jack bolts, on both sides of the movable machine, either before or after tightening the hold down bolts. Tightening jack […]

Read More

Pry Bars, Sledge Hammers and Come Alongs – Oh MY!

| | |

By on July 16, 2015

Precision alignment of rotating equipment is a task which requires precision. Those of us who perform this task are asked to position big, heavy machines to tolerances often less than the thickness of a human hair. The measuring tools used to perform shaft alignment are quite capable of successfully showing us how to position these […]

Read More

Adjustable Motor Plate Alignment using the Verti-Zontal Alignment Process

| | |

By on February 18, 2015

Recently while visiting a client’s site, we were asked for alignment advice regarding an electric motor coupled to a mixer. The customer shared that the electric motor sat upon an adjustable base plate with adjustment bolts (jack bolts) in the vertical and horizontal planes.   Despite the base plate having vertical jack bolts, VibrAlign’s typical […]

Read More

Use your Head Not Your Hammer!

| |

By on October 2, 2014

Many of our classroom discussion topics relate to problems in the field when attempting a precision shaft alignment of rotating equipment. One such topic is how to move a piece of equipment horizontally that does not have jack bolts already mounted on the base. The obvious answer is to mount a set of jack bolts […]

Read More

After Shaft Alignment, Back Off on Jacking Bolts to Reduce Vibration

| |

By on September 2, 2012

Jacking bolts provide an easy and accurate way to horizontally position a motor during a shaft alignment. However, it they are left tight against the feet, some unexpected problems may occur. During a recent training class at an Ohio steel mill, we went out to check the alignment on a blower fan that had been […]

Read More

Shaft Alignment of Small Machines

| |

By on August 13, 2012

The VibrAlign Training Faculty sees a lot different machines during our training classes across the USA. The one statement that we hear repeatedly from mechanics and millwrights is, “I would rather align a 500 HP motor & pump set than a 10 HP one”. We agree! While small machines are easier to “physically” adjust during […]

Read More

Getting Pushy–Jacking Bolts Revisited

|

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 […]

Read More