RE: [CAD_CAM_EDM_DRO] Re: RF-45 Retrofit

Terry -

Are you using calipers to measure that ID? On a diameter that size, the
calipers will show a smaller-than-actual ID if there are any flats on the
faces of the measuring tips. There is almost always some kind of flat,
unless they are sharpened like a knife. My Mitutoyos have about .020" flats.
I don't know how significant the error would be, but I don't expect accurate
measurements with calipers on small ID's.

Carlos

> -----Original Message-----
> From: Terry May [mailto:tmay@...]
> Sent: Friday, August 25, 2000 6:33 PM
> To: CAD_CAM_EDM_DRO@egroups.com
> Subject: [CAD_CAM_EDM_DRO] Re: RF-45 Retrofit
>
>
> Peter,
>
> I just re-checked mine, the screw journal is 14.98 mm (.589 in) and
> the bearings measure 14.91 ( .5870 ) I don't know if the bearings are
> under sized ( they are SKF )or the journals are over, but I knew this
> was too much difference. I'm thinking even if they are a little under
> like you said it would just make sure the two bearings are in contact.
> Terry
>
>
>
> > Terry,
> >
> > I went and miked mine. I swear it is dead on for the 15 mm
> bearings. Did
> > you double check all readings? I've not ordered my bearings but I'm
> possitive
> > mine will work as is. Just a feeling. Well, if they are different,
> no you
> > cannot press on with 12 thou interference. For this application,
> the
> > interference should be about a quarter thou at best, metal to metal
> would be
> > ideal. If you are not flogging your machine commercially, I'd
> say .001 under
> > would be OK too.
> >
> > See yah
> >
> > Peter
>
>
>
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