Speedi-Sleeve anyone shrink fit an undersize one?

I am dealing with a shaft dia of 1.326 in. The CRC/SKF Speedi-Sleeve does =
not have an application for this diameter. P/N 99134 is intended for a min=
imum shaft dia of 1.333 in. P/N 99131 is intended for a maximum shaft dia =
of 1.316 in. So I am thinking of a heat/shrink fit. Will I be able to get=
enough expansion? Being such a thin wall part, I would expect it to cool =
immediately on contact with the shaft. I am thinking of heating either wit=
h a heat gun or a "propane" torch (possibly using MAPP gas). I have looked=
around a bit and it appears that the competitors have set their catalogs t=
o parallel the Speedi-Sleeve catalog (frequently using the same P/Ns.
THe alternative to a shrink fit is to press the sleeve in place. Your tho=
Reply to
aribert n
Loading thread data ...
The thermal expansion coefficient of 304 stainless is 9.9 microinches/in per deg. F. To enlarge a 1.316" opening by .010" you would have to heat it up by at least 1010 degrees F. So I would say heating is probably not practical.
I have not used these sleeves but a 0.010" interference on a 1.3" shaft is way beyond a reasonable press fit. You would have to stretch the material by almost 1%, but the yield point is 0.2% as given by this data table
formatting link
Reply to
Nickel plate, maybe electroless?
Metal spraying?
Reply to
anorton - thanks for the reality check. I think I'll turn a thin spacer to limit the seal installation depth by about 0.060 to 0.080 and ride on a virgin area of the shaft.
Reply to
aribert n
microinches/in per=20
Sleeves tend to split if you try and do that.
Reply to

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.