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
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...
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
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...
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...
@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...
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...
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...
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...
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...
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
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...
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...
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
To EdStainless,
Sometimes these type of gears have 2 bolts for tightening (on each side, 4 total) and 2 to be used as guides (4 total), with a smaller diameter. In this case is an old mill, so who knows originally what was the case. But the 4 rods (on each side, 8 total) are the same...
I recently encountered a girth gear in an old ball mill with fasteners (to hold the sections of the girth gear) with threaded rods and nuts on both sides. I do not believe this to be the original design. And it got me thinking about the difference of fastening the gear sections with a...
Hello,
I have a problem in a cable drum for a mine shaft. This drum is smooth, so it has no lebus grooving for the cable to set, and also has 3 layers of cable, and it always works on the 2nd and 3rd layer, so I do not know if installing a lebus grooving would help.
The problem is that the...
Hello everybody,
I am looking to extend to the fullest the lives of our belts (in belt conveyor). We already do regular preventive maintenance (inspection, roller changes, lubrication, etc).
Want I want to find out is if there is any predictive maintenance that can be done in belts, like...
Hi all,
I am a maintenance engineer in a big firm and I always wanted to do a masters in engineering. I like my job, but I do not want to be here for the rest of my life (who does?). So I have a Bs in mechanical and electrical engineering and I want to do a Ms in energy but I don't want to...
