[modeleng] Re: Boring Bearings
- From: "Terry Lane" <tel@xxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Fri, 9 Sep 2005 07:26:37 +1000
Yes blokes - if I can lay my hands on that book I'll extract the relevant
info for yers.
Could take a while as this place is sorta like the Elephants Graveyard - it
the place where all the books in the world go to die.
> Hubert, in Dave Gingery's booklet on making your own
> small lathe, I think he solves this problem by boring
> the seats for the bearings with the headstock mounted
> on the bed by using a stiff boring bar. My memory is
> not what it used to be, but our fellow poster, TEL in
> Oz, has a copy of the book and can enlighten us on the
> point
>
> Al Messer
>
> --- shep <shep.28@xxxxxxxxxxxx> wrote:
>
> > As mentioned in my message to Al Messer, I am slowly
> > making a small, heavy, hopefully precision,
> > screwutting lathe from large lumps of solid cast
> > iron.
> > The centre height will be about 2". I have
> > finished the bed, (with 'dovetail' ways) and had
> > this precision ground, and have almost finished the
> > cross and top slides.
> > I am now planning the construction of the headstock,
> > also machined from the solid. The mandrel will be
> > 20mm in diameter, supported by two opposed taper
> > roller bearings of 42mm diameter. I am perplexed
> > how to bore the seatings for these bearings. I
> > have a 5" centre height Emco lathe and a horizontal
> > milling machine.
> > I thought of clamping the roughed-out headstock onto
> > the vees of the bed, and clamping the lathe bed onto
> > the bed of the milling machine, checking the
> > squareness with a dial gauge. It should then be
> > possible to drill and then bore the seating for the
> > bearing, using a boring head. Difficult, but
> > possible! My problem is how to bore the bearing
> > seating on the other end of the headstock, whilst
> > ensuring accurate alignment with the first seating?
> >
> > I hope that I make myself clear. Any practical
> > advice would be greatly appreciated.
> >
> > Cheers! Hubert Elffers
> > MODEL ENGINEERING DISCUSSION LIST.
> >
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>
>
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