Posts Tagged ‘flexible couplings’
Visual Inspection of Couplings and Machinery Components
Some things just don’t pass the “eye test”. Your eyes are actually great tools for seeing things that are not straight, not plumb, not level (pictures hanging on a wall for example), not right. Many times, just by looking at a coupling you can tell “it’s not aligned”, and you are usually correct. Visual Inspection:…Read More
Installation Errors Part 1- Coupling Care and Balance
Observing a training class of new mechanics can sometimes be a stressful proposition for a former field Millwright. Especially when said millwright has control issues. As part of our Precision Shaft Alignment Training, the trainees move from the classroom setting into the field to practice what they have learned. Transferring the knowledge gained in a…Read More
Critical Machines? It Depends on Who You Ask
I recently taught alignment training at a gas compression site. These were sharp technicians, and they keep these large gas compressors in excellent shape. We went out to check alignment between the engine and compressor. It was great just as I expected, because compressing gas is their only product. So I asked if they had…Read More
Roughing In Before Precision Shaft Alignment
Some people believe that precision laser shaft alignment has evolved to the point where pre-alignment steps, such as roughing in the alignment with a straightedge, are no longer needed. Well, quite frankly, those people are wrong! The reason for roughing in the alignment has little to do with how accurately the lasers/sensors measure. It has…Read More
Hammer Time-and When it’s NOT!
At VibrAlign, we are in the precision maintenance business. Our tools, our training, and our people, are all about precision maintenance. While teaching the field alignment portion of our shaft alignment training, at a customer site, we went out to align a particularly troublesome pump. They didn’t think they were getting the life…Read More
What’s the Point of Precision Shaft Alignment When We Use Flexible Couplings?
This is a common misconception in some industries surrounding flexible couplings. Some maintenance and production individuals believe that flexible couplings are designed to allow for a few degrees of misalignment. This is not quite the case. While flexible couplings do tolerate some amount of misalignment, this is not their intended purpose. The greater the misalignment,…Read More
Common Precision Shaft Alignment Questions Asked In Our Training Classes
While training mechanics all around the US, I have noticed that many of the questions asked in class are the same regardless of the industry. Fixturlaser tools are very intuitive and easy to use, so this puts the mystery on the alignment process. So here are some answers to some common alignment process related questions…Read More
Proper Coupling Application, Installation and Maintenance
Precision maintenance personnel ensure that rotating machinery is aligned well beyond excellent shaft alignment tolerances, but overlook other crucial elements that affect the operation of the machines. One of these elements is the coupling. The coupling is where the “handshake” between the driver and driven machine takes place. The coupling assures consistent power transfer and…Read More
Performing Alignment Checks as Part of Your Preventive Maintenance.
A systematic preventive maintenance plan is crucial to the operation and reliability of rotating equipment in factories and power plants. In addition any building or company that has HVAC equipment, water and sewer systems or hydraulic systems requires people with good mechanical skills to keep the rotating machinery running. Most preventive maintenance programs include pump…Read More
Is Precision Shaft Alignment Really Worth the Time?
Check out Stan Riddle’s article that appears in the July issue of EPnews that is published by our friends at Empowering Pumps. http://empoweringpumps.com/is-precision-shaft-alignment-really-worth-the-time/?utm_campaign=Empowering+Pumps&utm_source=hs_email&utm_medium=email&utm_content=20410553&_hsenc=p2ANqtz-8wDAT0u6imImafDL0h66xtUJrPlUp3asbpte8HTcflZB1DHqU1-TWloPcXHoBv71NTWae9KWqOQ0kprU2t58atzGdYaA&_hsmi=20410553Read More
Why Misalignment Draws More Current
In a previous blog article by Patrick Lawrence “Was Softfoot the Problem” before and after vibration spectrums were taken and the results post precision shaft alignment were remarkable! Apart from contributing to higher vibration levels, misalignment has another adverse effect, increased motor loads! I wanted to find a cause and effect case study that would…Read More
Coupling Alignment Tolerances vs. Shaft Alignment Tolerances
A coupling alignment tolerance and a shaft alignment tolerance are different things – VERY different things! A Coupling Alignment Tolerance is often (but not always) the maximum amount of misalignment the coupling will operate at before premature failure. A Shaft Alignment Tolerance is the maximum amount of misalignment the shafts can tolerate before they begin…Read More
Is Your Coupling Relaxed?
During the OJT portion of a Fixturlaser NXA Pro training class, at a power plant, the students asked me to allow them to perform the precision laser shaft alignment of a 75 HP electric motor to pump without interrupting them or offering any advice. I obliged and let them go on their way. The first…Read More
There is an ongoing debate on what tolerances are acceptable when aligning your rotating equipment. The debate falls on the “published tolerances” provided by the coupling manufacturers and the tolerances “recommended” by alignment equipment companies, reliability associations and rotating equipment OEM’s. The offset and angularity tolerances are much more permissive from the coupling manufactures than…Read More
Flexible Couplings and Flexible Shafts
Most mechanics are pretty familiar with flexible couplings. They are designed with an elastomer, or flexible element, which compensates for slight amounts of misalignment through a sliding motion between the coupling hubs and the insert. However, it is very important to have some idea as to how much the coupling will flex before it begins…Read More