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Recent content by jarimasen

  1. jarimasen

    Visual inspection for open gear guide

    Thanks for your responses, 3DDave, What do you mean by tooth form and how do you measure it? Is it the same as contact pattern test? How do you measure this last one? JM
  2. jarimasen

    Visual inspection for open gear guide

    Hello all, I am trying to find a guide for visual inspection on wear for open gears (girth gear and pinion). Specifically for ballmills or kilns. I saw the AGMA 1010 E95, but I am trying to find measurement points and how to take them. In my country we do these measurements (backlash...
  3. jarimasen

    Bearing housings with pivot guides

    Is a pillow block. The mill is a really old mill. Let me see if I can check at least the model of the mill. Here are the pics from pillow block. JMhttps://files.engineering.com/getfile.aspx?folder=1562793b-66ba-461d-998a-8438c60313ea&file=DSCF6074.JPG
  4. jarimasen

    Bearing housings with pivot guides

    Hello, I recently came across bearings for a ball Mill that has on the housings 2 pivoting guides. What are these for? I will try to find a picture to post it. They are underneath the base of the housings and I do not know if there are to allow movement in a direction or what is its...
  5. jarimasen

    Help! Interference fit for pinion - shaft in an open gear of ball mill

    Thank you!! I found the book and the dimension I was looking for JM
  6. jarimasen

    Help! Interference fit for pinion - shaft in an open gear of ball mill

    Hello, Recently a shaft for transmission of a ball mill was damaged. We want to use the same pinion, and are now fabricating a new shaft. We have doubts on the interference fit of the pinion with the shaft. I have not found any tables for this particular application, and I wonder if you can...
  7. jarimasen

    Can I use a double helical pinion with a herringbone gear?

    @tbuelna You are right about the sketch, I guess it did not help to clear things... I hope this can clarify better https://files.engineering.com/getfile.aspx?folder=4307be9f-4d35-4dd9-bf00-6855cbe282e3&file=Picture1.jpg @lukin1977 The gears are used for an open transmission of tubemill We...
  8. jarimasen

    Can I use a double helical pinion with a herringbone gear?

    I have been thinking about what you mention here. About the self alignment of the pinion. This type of transmission usually has a fixed bearing and a loose bearing (see drawing). The fixed bearing is the one between the pinion and the motor. If this is fixed and does not let the pinion shaft...
  9. jarimasen

    Can I use a double helical pinion with a herringbone gear?

    At one of the plants they are asking me the following: They have a NEW double helical pinion (it has a gap in the middle) and they have a USED herringbone gear.. You can see where this is going... They are supposed to be same pitch, et cetera... However, I have not seen before a double...
  10. jarimasen

    How to test a 12" girth gear with pinion

    Those are great ideas Mike! -This time of year, if you were >1000 miles North, you could lay the girth gear down on a sheet of ice, and, uh, curl the pinion around it. -Got a nice flat floor you don't mind getting greasy? I am guessing you mean flat on its side... Maybe this is what Dave was...
  11. jarimasen

    How to test a 12" girth gear with pinion

    The problem with this is the following: The gear is 12ft in diameter. Rolling the pinion by hand will be quite difficult The gear and pinion are spares. That is are not attached to the equipment. The piece (2 sections) are on the floor and the pinion also. I can get housings and bearings...
  12. jarimasen

    How to test a 12" girth gear with pinion

    Hello Oscyes, Is a helical gear. Is actually herringbone. The pinion and gear will look something like the picture (only instead of spur gear, is helical) Regards, JM
  13. jarimasen

    How to test a 12" girth gear with pinion

    Hello all, I have a bit of a problem. I have a spare girth gear that (might) belongs to a ball mill, and I need to check it with the pinion, and perform contact test, backlash, radial and axial runout (2 sections), et cetera). There is a distinct possibility the pinion does not correspond to...
  14. jarimasen

    Threaded rods vs headed bolts difference

    Well my initial question was if there was a difference, regarding functionality or stress as to having a threaded rod instead of a headed bolt. Regarding dimension (David Stecker), there is no problem in placing bolts. I have already done it, the mill started and it seems fine. We have...
  15. jarimasen

    Threaded rods vs headed bolts difference

    The rod is quite long 13”, however, the length is in part because there is a need to place a nut, washer and a jamnut. When a headed bolt is placed, I’ll only need 10” length. JM
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