[modeleng] Re: Boring Bearings
- From: Allen Messer <al_messer@xxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Sat, 10 Sep 2005 06:19:52 -0700 (PDT)
Hubert, If you have a copy of Sparey's book, The
Amateur's Lathe, look at Fig. 137 on Page 135 where a
boring bar betwen centers is being used to face the
end of a casting. I think you could use a
modification of this proceedure to do the recesses for
the bearing flanges on your lathe headstock.
Al Messer
--- shep <shep.28@xxxxxxxxxxxx> wrote:
> Dear Alan
>
> Thanks for this helpful message. I agree that
> this would be a splendid
> way of assuring alignment and the identical size of
> the two bores.
> I am probably being being very stupid, but my
> problem is how to ensure
> accurately squared shoulders, thus creating the
> abutment for the outer races
> of the bearings. This can be done with a boring
> head, which can produce a
> facing cut. A facing cut is not available when
> using a boring bar between
> centres.
>
> Cheers! Hubert
>
> > From: "alan Stepney"
> <alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
> > Subject: [modeleng] Re: Boring Bearings
> > Date: Fri, 9 Sep 2005 22:13:43 +0100
> >
> > I have only quickly read the original message so
> may not be totally clear
> > on
> > what is required.
> >
> > However, if possible, I would try to bore both
> bearings at the same
> > setting,
> > by bolting the headstock down, to the cross slide
> , and then use a between
> > centres boring bar.
> > Even if you had to jury-rig a frame to support it,
> (perhaps OVER the top
> > of
> > the boring bar) and that support meant taking very
> light cuts, at least
> > one
> > could be assured that they would both be to the
> same setting.
> >
> > Alan Stepney
> >
> > http://www.alanstepney.info
> > Model Engineering & steam engine information pages
>
>
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