Sleeve Bearings
Sleeve Bearings
(OP)
Can anyone help me with the design of a sleeve bearing, I am currently trying to understand how much side load I can have on my sleeve bearings. Does anyone know if there is any rule of thumb with regards to how long you should make your sleeve bearing based on the side load. To help you answer my question, imagine a column that supports a tank head. The tank head weighs about 200 pounds with all its accessories, and the C of G of the tank head will be about 21 inches from the column axis. The tank head is about 36" above the pivot point of the column. Anyway, if anybody has any helpful advice, it would be most appreciated, I have no books that talk about this, and have been unsuccessful so far with my internet research.
Thanks
Tom
Thanks
Tom





RE: Sleeve Bearings
RE: Sleeve Bearings
Thanks
RE: Sleeve Bearings
mu*(1+2*R/D)
wher mu is the coefficient of friction
R is the radial distance of the axial load
from the axial centerline of the bearing
D is the diameter of the bearing
L is the length of the bearing
If this is not what you are asking - then I apologise for hopelessly confusing te issue !
RE: Sleeve Bearings
Cheers
Tom
RE: Sleeve Bearings
RE: Sleeve Bearings
Re-reading everything you have said, I think my interpretation is correct, my formula should work (I hope), and it looks as though the following data apply :
R = 21"
L - unknown
D - unknown
mu - depends very much on lubrication conditions
machinery's handbook gives .16 for steel on
lubricated bronze, but .35 for steel on unlubricated
phosphor bronze. Unless you are sure about the
lubrication conditions, I would assume unlubricated.
You will note that the weight of the lid is not a factor, at least in whether the shaft self-locks. It would be a factor in sizing the bearings for adequate life, however.
If you can provide D, you can figure out what L has to be. L is either the length of the bearing, or, if there are two, the distance across the outside edges of the bearings.
Whatever the answer turns out to be - I would double it, and recommend that. Others may disagree on that point.
Clarify further if necessary, in light of the above.
RE: Sleeve Bearings
Thanks again, sorry I had to go to bed after my last post, it was 1 AM.
Tom
RE: Sleeve Bearings
However, once you have found the L/D ratio to avoid lock- up from this equation, there are still a number of other things you need to check. One of these is the shaft deflection - if the shaft bends too much, you will get edge loading on the bearings. Another thing you need to check is the actual load on the bearings themselves.
RE: Sleeve Bearings
Thanks
Tom
RE: Sleeve Bearings