Don’t know if you’re still active on here but thank you for these videos, this is the most detailed videos on this subject on KZfaq, as a 24 y/o maintenance mechanic trying to learn as much as i can as fast as i can thank you. i hope to be of your skill and knowledge level one day
@shaftalignment6105Ай бұрын
Flamer- Thank you for the kind words. Yes we are still here despite the fact that KZfaq no longer pays us for the advertising. We don't plan on removing these videos because of people like you. Thank you for your interest. John Piotrowski.
@hassanYahiaoui2 ай бұрын
thanks
@naviddavanikabir8 ай бұрын
thank you for making this series of courses. it made me even more confused. What can explain the mechanism behind reduced vibration as the result of misalignment?
@shaftalignment61058 ай бұрын
The explanation for why the vibration decreases is explained in slide 16 in the tutorial. Here is the text for the narration of that slide ... If you remember, a short while ago, when we were talking about things that put static loads on bearings, it was mentioned that three very common sources of static forces on bearings were gravity, or the weight of the rotor, belt tension, and shaft misalignment. So, let’s examine the static forces that are present in these two shafts and for this discussion we are viewing the shafts in the side view. The shaft on the left has some weight so there is a downward force on it due to gravity. Each bearing produces an upward force opposing the gravitational load. Similarly, the shaft on the right sees the gravitational force and its bearing produce an upward force to oppose the gravitational load on them. If we begin to misalign these two shafts, the flexible coupling accommodates a certain amount of the misalignment but once that is exceeded the shafts will start elastically bending. The gravitation forces are still there but now, through the coupling, the shaft on the right induces a downward force on the shaft on the left. This force now produces an additional force on the inboard bearing in the downward direction but it will produce an upward force at the outboard bearing. The shaft on the left produces forces on the shaft on the right also. Through the coupling, the shaft on the left induces an upward force on the shaft on the right. This force now produces an additional force on the inboard bearing in the upward direction but it will produce an downward force at the outboard bearing. If we continue to misalign these two shafts, the shaft begin elastically bending even more. The gravitational loads are still present, across the coupling, the downward force on the end of the left shaft has increased as well as the reactionary forces on its bearings and the upward force on the shaft on the right has increased as well as the reactionary forces on its bearings. Shaft misalignment induces static forces on the shafts that will diminish the amount of motion / vibration that is occurring.
@tomconner50679 ай бұрын
A degree wheel or increments on the outside edge of the flange/disc diameter would be ideal, and so would a tangential alignment dowel/rod tube on the fixed machine positioned to perform alignment measurements on the adjustable machines rotating shaft and or flange/disc outside diameter which should have incremental 360° markings stepping up increasing at every 5° 10° dot point at every 30° (except @ 0-360°,120°,240°) 45° maximum size at every 90° only diamonds at 0-360° 120° 240° all you need to know is the center and constant radius or diameter
@shaftalignment61059 ай бұрын
Great suggestion Tom. Thank you for your input. John Piotrowski
@Granahe50111 ай бұрын
Thank you for this explanation. It is enlightening. And, I felt that the textbook I bought that you wrote, Shaft Alignment Handbook is now in supported with audio and video.
@JaykeSapalaran-iq3qs11 ай бұрын
Great video information 👍 thanks for sharing your knowledge and experience 🇵🇭🫡
@user-hv8zu7ts9j11 ай бұрын
Thank you very much! Clear and very informative - information I needed to know & apply.
@ogbonlaiyekassim4460 Жыл бұрын
thank Engr John for this tutorials , really appreciate Sir !!!!
@shaftalignment6105 Жыл бұрын
You are most welcome!
@ogbonlaiyekassim4460 Жыл бұрын
you're the best Mr John
@umairshahid5419 Жыл бұрын
Only 1-3 part not running
@dennisminks8282 Жыл бұрын
If the coupling face has 6 bolt holes, place one hole at 12:00, insert a bolt at the 1:30, 10:30 and 7:30 positions. The bolt should have a nut on the backside of the face lightly tightened so the head of the bolt may be turned by hand. An electrician's level can be mounted to the two bolts at the 1:30 & 10:30 positions and the leveled. The hole that was placed near the 12:00 position should now be within a couple of degrees for zeroing. Likewise, when you need the left/right positions, you use the same procedure for locating those points using the 10:30/7:30 bolts.
@shaftalignment61059 ай бұрын
Great suggestion Dennis. Thank you for your input. John Piotrowski
@lahcenchaanbi7224 Жыл бұрын
Thanks John
@Martinfelipa25 Жыл бұрын
Hola tiene nivel intermedio? Videos grabados para poder acceder?
@petravanwoudenberg69162 жыл бұрын
Tube video of people using a subaru Roof tent
@ahmedabounar46132 жыл бұрын
Could you please share the slides used during presentation? Thanks in advance.
@jimbeam9922 жыл бұрын
I watch these just to listen to the narration. Like soothing white noise to relax to.
@percysilverio3102 жыл бұрын
Muchas gracias por la explicación.
@Quy_Tran643 жыл бұрын
hi. why when measuring 2 sides we have negative results .but not 1 side negative , 1 side positive . please explain . thanks
@omarmohummed573 жыл бұрын
Words can't describe how I feel, thank you Mr.John Piotrowski for this amazing tutorials which peresented in a simple informative way, you sir a true genuis, I am looking forward to check out the rest of tutorials, hopefuly the rest of tutorials will be affordable especialy for people from low income countries, agian thank you sir, best regards
@shaftalignment61053 жыл бұрын
Thank you so very much for the kind words. I hope that this information has helped you. We are hoping that the remaining tutorials will be available in the next few weeks. Thank you for your interest. John Piotrowski
@omarmohummed573 жыл бұрын
@@shaftalignment6105 Alright Sir, could you please make an announcement when they avaliable.
@ashwamedhyedave2353 жыл бұрын
What a super explanation 👌👌👌💕💕
@jeancarloscastrorodriguez23773 жыл бұрын
Good thanks for this video series. I have seen them all clarify many doubts but the vibration analysis generates another dimension to the alignment and as I think it has happened, myths that are taken as facts in the industry are falling. For example, it is determined by its traction and its tests that the vibration and the alignment does not have an appreciable relationship for a diagnosis to have and greater certainty of the alignment would be with the temperature of the flexible elements the coupling that is what I take as more evident . With these videos I realize that we have to register more variables and analyze because there is nothing clear, the only thing would be the duration of the equipment without failures for the longest time and its study in it. That is to say that to align and have a not vast idea with the laser and a vibration pencil, it is also necessary to improve with nearby thermal cameras (the temperature guns are not exact to my experience, only referential there is a lot of difference) improve the equipment for taking vibrations to have up spectra. Finally, I see that it is not based on lasers myself and investigated and how that its precision is not greater than that of the dial indicators, only that as they have programming that performs the calculations it is easier and takes less time, I would like a topic on this (the instruments for alignment and monitoring) Thank you very much for sharing quality information.
@chroustek3 жыл бұрын
Hi, great speech at the end, thank you!
@johnpiotrowski16733 жыл бұрын
Thank you for watching.
@gotobasics1453 жыл бұрын
Very well explained
@johnpiotrowski16733 жыл бұрын
Pravindra: Thank you for watching the video and the kinds words. John Piotrowski
@cesarmaravi79153 жыл бұрын
Great video, thanks!
@stephenrobinson20863 жыл бұрын
Superb tutorial. Thank you
@johnpiotrowski16733 жыл бұрын
Stephen: Thanks you for the kind words. Hope the information helped you in some way. John Piotrowski
@amirzayd28053 жыл бұрын
Engineer John, I have question. For the validity rule (Top + Bottom) = (South + North) Using clock symbol (12:00 + 06:00) = (03:00 + 09:00) This rule is applicable on Rim Only or Radial readings? How about the Face Readings or Axial, Same or different? Kindly enlightenment me. Thanks 👍
@shaftalignment61053 жыл бұрын
Amir: The Validity Rule applies to either radial / rim OR face / axial measurements.
@amirzayd28053 жыл бұрын
Thanks very much Engineer/ Sir John 👍
@siddharthnizama83432 жыл бұрын
Hi
@khemrajverma99173 жыл бұрын
Hindi me bhi video banaya karo sir
@rotatingandstaticequipment26113 жыл бұрын
Dear sir, thanks for the videos. Your videos are really great. Kindly upload videos about vertical alignment methods and double face alignment.
@jonathanponce52284 жыл бұрын
Please ad more sample laser alignment how to align and add simming or minus
@darkandcurious12774 жыл бұрын
The very Best Alignment Tutorial I have ever watched. It's full of practical advises and tit-bits that are very helpful. The tutorial on soft foot simply blew me away! Thanks Engr. John. Thank you so much.
@shaftalignment61054 жыл бұрын
Darkland Curious: Thank you for the kinds words. I hope that this information will help with your rotating machinery. John Piotrowski
@mariohtn4 жыл бұрын
You have very useful videos
@shaftalignment61054 жыл бұрын
Mario: Thank you for the kind words. I hope that the tutorials will help with your rotating machinery. John Piotrowski
@mariohtn4 жыл бұрын
@@shaftalignment6105 they are very helpful in combination with recommended books.
@bossjerometechshow4 жыл бұрын
Pls sir add in our topic reversed alignment method
@hadidtedji63894 жыл бұрын
thank you its very helpful
@vaibhavkambli17694 жыл бұрын
Thanks sir for detailed information.
@ianreshef99464 жыл бұрын
Muchas letras, pocos números.
@kelliestratton69914 жыл бұрын
Thank you
@samyhassen13144 жыл бұрын
excellent
@rubenchok96924 жыл бұрын
Buenas Muchas gracias por la informacion, apesar que entiendo un poco el ingles, seria bueno tener todos estos videos traducidos en español o tener textos . Algun sitio que me pueda recomendar. gracias.
@muhammedkeyikov17614 жыл бұрын
Mr.John what about lift check of the bearings radial clearance ?
@shaftalignment61054 жыл бұрын
Muhammed: Great question. Shafts that are supported in journal bearings (a.k.a. sleeve, babbitt, plain, hydrodynamic, bushing), require a certain amount of clearance for the lubricant to get between the shaft and the bearing when the shaft is rotating. This clearance is typically 1 mil per inch (1 micrometer/mm) of clearance. For example, a 6 inch diameter shaft would have about 6 mils (0.006") of clearance. Assuming that the shaft is horizontally mounted, once the shaft gets up to speed, the shaft does indeed lift up on a thin film of lubricant but the film thickness only ranges between 0.5 - 1 mil (0.0005" - 0.0010"). The shaft is not going to automatically center itself inside the bore of the bearing because it needs a film of lubricant to run on. If both shafts on a two element drive system have journal bearings, the they both would lift up about the same amount making the oil film thickness a non-issue. If one machine is supported in journal bearings and the other shaft is supported in rolling element bearings, then you could set the shaft supported in journal bearings about 0.5 - 1 mil lower to compensate for it but that's almost not worth worrying about. Thanks for your interest! John Piotrowski 3/30/2020
@tahseenfaisal32424 жыл бұрын
I downloaded all tutorials it very useful, thank you engineer john
@shaftalignment61054 жыл бұрын
Tahseen, I hope these tutorials are helpful. Thank you for the kind comment! John Piotrowski
@muhammedkeyikov17614 жыл бұрын
superb
@carlosaguilar45054 жыл бұрын
Why SAG affects the horizontal readings?
@shaftalignment61054 жыл бұрын
Carlos: For horizontally mounted shafts, typically the side (horizontal) readings are the same so they cancel each other out. Sag only affects the top and bottom (vertical) readings. For example, if you were using a bracket that had 10 mils of sag, when you check the sag, there would be 5 mils of sag on both side readings.
@carlosaguilar45054 жыл бұрын
@@shaftalignment6105 I have another question, why divide they SAG value by two when using the reverse dial method, and when using rim and face method the SAG value is the complete value?
@shaftalignment61054 жыл бұрын
@@carlosaguilar4505 Carlos: For horizontally mounted shafts, when using mechanical brackets and dial indicators, the amount of "sag" that occurs from the 12 o'clock to 6 o'clock reading is being affected by gravity which needs to be compensated for when aligning your machinery. For example, if you had a bracket and indicator arrangement where you had 10 mils (-10) of bracket sag from the 12 o'clock to 6 o'clock measurements and you saw -40 mils for your bottom reading, 10 mils of that -40 is due to the "sag" in the bracket. If you would have had a "perfect" bracket that had no sag at all , you would have only measured -30 for your bottom reading, not -40. Why? Because 10 mils of the -40 reading is due to the sag in the bracket. To compensate the bottom reading for sag, regardless of whether it is a rim or a face reading, you subtract the amount of sag to the bottom rim or face reading. Sag also has an effect on the "side" readings and it is typically symmetric where the effect of the sag for the side readings is HALF of the amount you observed from the 12 o'clock to 6 o'clock position. This is true for any rim or face measurement and it's true regardless of whether you are using the Reverse Indicator, Face-Rim, Double Radial, Shaft to Coupling Spool, or Face-Face methods. Thanks for your interest! I hope I answered your question.
@carlosaguilar45054 жыл бұрын
@@shaftalignment6105 thank you Mr. John, i have one more question, why in your book, specifically in the reverse dial method, You take it the readings in both dials at six o'clock? Thanks for your attention
@ScottTurnerformeindustrious4 жыл бұрын
Top notch training. Thank you!
@bikramjitmandal41894 жыл бұрын
Excellent excellent excellent 👍👌✌️👌👍✌️👍👌👉👉👉👉
@shaftalignment61054 жыл бұрын
Bikramjit: Thank you for your kind words. They are appreciated. Here is hoping this information will help you. John Piotrowski
@nimercacsire71944 жыл бұрын
alignment yes
@ramesutam46804 жыл бұрын
Nice nolej
@ayeminnyein12225 жыл бұрын
Thank sir
@donignasis83555 жыл бұрын
Thanks Sir JHON
@shaftalignment61055 жыл бұрын
Don: Thank you for watching. I hope this (and the other) tutorials are helpful. John Piotrowski