I am replacing bearing, sleeve, and seal on my 49 8N. The new bearing and seal are OK but the ID of the sleeve is too small. The pto spline is 1 1/8 but where the bearing and sleeve fit are about 1 3/16. The bearing is the right size but the ID of the sleeve is about 1 1/8. The sleeve part number is 9N735B. What do I need to order to get the right sleeve?
- Thread starter rray
- Start date
This morning I heated the sleeve to just short of welding temperature and tried driving it on with a hand sledge. It would not even start.
I measured the thickness of the sleeve before I heated it. It measured 0.254. The thickness of the old sleeve measured 0.221.
Does anyone have a shaft that you could measure the diameter where the sleeve fits?
I do not doubt that I may have a b@st@rd shaft. It would be better if I could find the sleeve that fits before I make one.
I measured the thickness of the sleeve before I heated it. It measured 0.254. The thickness of the old sleeve measured 0.221.
Does anyone have a shaft that you could measure the diameter where the sleeve fits?
I do not doubt that I may have a b@st@rd shaft. It would be better if I could find the sleeve that fits before I make one.
TheOldHokie
Well-known Member
- Location
- Myersville, MD
I don't know what is going on with your parts and my guess is the "1" thick" specification in the part description is actually length. I can't help with part numbers but based on your measurements you are not going to get that sleeve on that shaft.
That said these types of fits are more or less industry standard per ANSI B4.1 which defines 5 classes of force fit (FN1 through FN5) with class FN5 being the "tightest":
[i:6e764dbf0e][b:6e764dbf0e]Class FN5:[/b:6e764dbf0e] Force fits are suitable for parts which can be highly stressed or for shrink fits where the heavy pressing
forces required are impractical.[/i:6e764dbf0e]
The [u:6e764dbf0e]customary[/u:6e764dbf0e] limits on a class FN5 shrink fit on a 1-3/16" shaft would be .004/.0015 interference. You have the parts and you can obviously measure and have the wherewith-all to fabricate so go from there. If it were me rather than try to fight my way through the part number maze I'd bore that sleeve to the high side of those limits and shrink the sucker on.
TOH
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