Spinning casting a babbitt bearing
Spinning casting a babbitt bearing
(OP)
Hello
A customer wants us to spin cast a babbitt bearing. We do this frequently but always horizontally and "smaller" than this one.
This one is to be spun vertically has a inside diameter of 48.8 inches and is 51 inches tall.
The question I have is what speed do I need to turn this to raise the level of the liquid babbitt to the required height. We will have a damn on the top to retain the babbitt from spilling out and "hope" to have a wall of at least 1" at the top. Given that, how thick will the wall be at the bottom.
My calculator does not have nearly enough buttons to figure this out. Will be using #2 babbitt but do not know the specific gravity of that. For anyone helping with this calculation use the SG of lead.
Thanks, comment on the wisdom of this process also accepted.
Ralph
A customer wants us to spin cast a babbitt bearing. We do this frequently but always horizontally and "smaller" than this one.
This one is to be spun vertically has a inside diameter of 48.8 inches and is 51 inches tall.
The question I have is what speed do I need to turn this to raise the level of the liquid babbitt to the required height. We will have a damn on the top to retain the babbitt from spilling out and "hope" to have a wall of at least 1" at the top. Given that, how thick will the wall be at the bottom.
My calculator does not have nearly enough buttons to figure this out. Will be using #2 babbitt but do not know the specific gravity of that. For anyone helping with this calculation use the SG of lead.
Thanks, comment on the wisdom of this process also accepted.
Ralph





RE: Spinning casting a babbitt bearing
Barry1961
RE: Spinning casting a babbitt bearing
Tb = Tt + R-sqrt(R^2 - 2*g*H/(omeg^2))
Where Tt = the thickness of the bearing at the top
Tb = the thickness of the bearing at the bottom
R = inside radius of the bearing at the top
H = height of bearing
omeg = angular velocity of container rad/sec
g = acceleration due to gravity
Hence if Tt = 1", R = 24.4", H = 51", and omeg = 41.89 rad/sec = 400 rpm (say), then Tb would be 1.465".
Based on your actual experience, does any of this look right to you, or have I screwed up somewhere? (It wouldn't be the first time).
RE: Spinning casting a babbitt bearing
RE: Spinning casting a babbitt bearing
Ralph