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Recent content by JS_

  1. JS_

    Pulley bearings

    I believe the assembly is called a static pulley. It uses a static shaft, while the drum rotates. Companies like this one linked below could give you better insight of construction and maintenance practice for these units. Link
  2. JS_

    Best method to repair a Spherical OD journal bearing (also called babbitt sleeve bearing)?

    I will use this for an example: A 4" journal turns at 100 rpm , the circumference is moving at 100 feet per minute...... Out of an old book on journal bearings Under 600 feet per minute (Diameter X .001) + .001 = recommended clearance Same book over 600 feet per minute (Diameter X...
  3. JS_

    Best method to repair a Spherical OD journal bearing (also called babbitt sleeve bearing)?

    Curiosity, is getting the better of me..... How did you come up with the .007 vs .015 for the Inside Diameter? How did you check the fit on the outside diameter? If it really is out of spec.. Why not make the supplier fix the issue?
  4. JS_

    Increasing Vibrations in 15,000 hp Centrifugal Pump

    I'm curious.. What is the shaft size and clearance in the journal bearings? What is the clearance in the wear rings? Is it a sleeve bearing with a bronze oil ring? What is the rpm?
  5. JS_

    Vertical Shaft Pump Runout

    Obviously, is it just a paper trail issue? or did something actually happen to the shafting? I would suggest some reading material.....[: https://en.m.wikipedia.org/wiki/Airy_points :] And some V blocks, in the absence of a granite plate a large milling machine table would work. A lathe with...
  6. JS_

    Vertical Shaft Pump Runout

    So what is going on with your pump, that caused you to want to measure shaft run out? Pump Bowl shafting is .002 per foot TIR line shafting is .005 per foot TIR You might as well tell us spider spacing, HP, RPM..... Etc....
  7. JS_

    API 610th/ VS1/ Soleplate Installation into metallic structure

    Maybe this would work.......Five star grout....https://www.fivestarproducts.com/products/epoxy-grouts/hp-epoxy-grout.html
  8. JS_

    Crane maintenance and problems

    Question 1: ..... someone answered Question 2: ..... someone answered ......Add some more info..electrically operated cranes..Control Brake and a Load Brake one controls lowering of the load and the other brakes when stopped..Holds the load.....Sometimes the control brake is built into the...
  9. JS_

    VTP Pump major failure

    Out of curiosity, Do you have more pictures? What size of shafting? How much HP? & RPM? What is length of of pump assembly? and column pipe length? Usually,from my experience, spider bearings and or pump bowl bearing lock up when you have a dry run or not enough liquid to lube the...
  10. JS_

    Torque to be applied

    A 30mm gap? I've run into something similar, you might need to look for an adapter sleeve or European term collet as we discovered when management went looking for a replacement for a damaged part. Re-Measure everything, make sure it right. I know its a long process, use the 1/4 turn draw...
  11. JS_

    Torque to be applied

    I have seen two different ways to deal with shrink disk or Ringfeder couplings. One way is continuous tightening in 1/4 turn increments. The second is a crisscross pattern. The last one, I worked with the mechanics would pull through the torque wrench click with a little extra. That day it...
  12. JS_

    Thread's chamfer size

    On hardened materials you need to counter bore a couple thread leads to prevent thread tear out on the edges...
  13. JS_

    Motor anti-reverse-rotation device failure (sliding pin type)

    Did anyone stop and consider it might be an anti-reverse device that uses steel balls instead of pins?
  14. JS_

    Motor anti-reverse-rotation device failure (sliding pin type)

    Holes are to small .015 to .02 clearance, no lubrication required. A tight fit on pins / hardened dowels will not allow the movement that you need for the ratchet to work properly. opinion: As for the extra holes, I would keep them. no springs, gravity does the work. re examine the pin size.
  15. JS_

    Hot alignment & Motor run test

    After.. I would recommend some sort of alignment monitoring. Example: RotAlign live trend. The computer knows where you left the alignment, after running you will have an idea of how each machine grows thermally. There is of course the old stand by..... dial indicators and graph paper.....
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