Bearing ID increases or decreases w.r.t. temperature

[kamal11]

I posted this query in bearings section. I feel this is the right forum to post this query.

Hi all,
This is a general question.

When we heat a cylindrical bar, it expands in Length, Outer diameter and
Inner diameter.

Now i have two queries.

1) We press fit a sleeve bearing made of steel with a tin babit coating on
to an aluminum endshield. When this assembly is heated
will the ID of the bearing increase or decrease. Our vendor has sent us
data with Id of the diameter to be decreasing when the assembly is heated.

2) If all the dimensions are increasing, where is the extra volume coming
from?
Regards
Kamalakar

 

[GregLocock]

2) potential energy in the inter atomic bonds

Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.