[clayman]

Hi Again, Just wondering if anyone has some info on shrinking in sleeves with liquid nitro. I will need to shrink a sleeve into a fluid end block. The sleeve is made from 17-4 stainless and measures 3.5"OD and 3" ID. The thing is i want to finish the sleeve before installing and i have a tolerance of +.003 -.000 when its in place. So if i gave it a .004 interference fit how much would the ID shrink????? I'm hoping someone out there has done this before. any help would be greatly appreciated.

[Geof]

I have done it many, many years ago shrinking liners into cylinders heads for valve stems. As I recall my interference was something like 0.0005 on 0.5000" diameter.

Your 0.004 interference on 3.500 diameter may not be possible because liquid nitrogen is only about -196 degrees. Have you done a calculation for the shrinkage you will get with a 200 degree temperature change.

Anyway, whatever interference you use will be very close to the reduction in your ID if the end block is signficantly thicker than your sleeve.