"Terry Coombs" wrote in message ...

Almost finished with the part ... OK , what this part is , it's a sleeve
that goes on a motor that runs an oilless compressor . This sleeve needs to
be press fit on the motor shaft as it transmits all the torque to the
crankpin . The crankpin has a taper that fits into a half-dovetail cut into
the sleeve , as the nut is tightened the dovetail locks the crankpin to the
sleeve/shaft .
I currently have it machined for a .0015 interference fit ~ .700" shaft
diameter. The outside has to be a hand-press fit into a roller bearing and
the crank plate that mates the shaft to the crankpin . NOW , the question is
how much is this sleeve going to grow when we press it on ? Do I allow for
that much growth , or less ? Once installed on the motor shaft it's going to
be difficult to turn it down if I get it wrong ... and right now I have
exactly the fit I want in the bearing .This would sure be easier if there
were holes for centers drilled into the shaft
--


Oops...forgot about the sleeve...

--what happens unless it is an exceptionally thick-walled sleeve, is that for all practical purposes the sleeve OD grows by the exact same amount as your shaft interferance fit--also, you need to be careful that any press fit sleeve is not too thin, because they will easily split...incidentally, this is a phenomena you can take advantage of for instance if you have a bearing inner race next to a shoulder and you can't get anything in there to pry it away from the shoulder....just grind a flat on the race 'til you're about .020 or so away from hitting the shaft and then give it a good whack with a hammer and sharp chisel.right at the thinned area...it'll split, allowing you to easily slide it off....