How do I use heat to fit parts?

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aread

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I have an aluminum tube and need to fit an aluminum sleeve inside of it and have it fit tightly enough not to move with moderate vibration.

The outside tube is 1 3/8" OD and 1 1/8" ID.

The sleeve is 1" ID.

What size should I make the sleeve so that when I heat the tube, it will go inside, but then when it cools, stay there.

I can turn a nice slip fit at room temperature and will have to use glue to hold it if I can't find information on the heating technique.

Thank you for any help,
Allen
 
Thanks guys!!

I guess that the best way to figure out how big to make the sleeve is to measure it at room temp, then measure it hot.

I was hoping that someone knew of a rule of thumb on this technique.

Anybody know the technical name of this technique? That way I can google it.

Thanks
Allen
 
flatbelter,

Thank you!!! That's exactly what I was looking for.:D

Much appreciated!

Allen
 
Thank you for the link, I have 'repaired' several gears in the past by turning down the original boss and then boring out the replacement gear to be an 'interference fit' on the boss (basically because they have had a keyway or a flat machined on them that I am too lazy -actually insufficiently skilled- to copy accurately) I just use a lot of heat on the outer and it usually drops into place and 9 times out of ten judging it by feel works but oh that tenth try when the gear ring splits as it cools because the fit was too tight. I will use a bit of science and maths from now on to get it right. Also a no brainer - that is until you have done it yourself- is allowing things to cool naturally, the only other split occured when I quenched the thing in water, the rapid contraction gave no time for the forces to gradually take up the strain and 'bang'
I love that we learn from our mistakes, providing it hasn't cost too much!!
 
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