1541Re: worn out bed
- Mar 14, 2006--- In email@example.com, "johann_ohnesorg" <bigdukeone@...>
>those are some good points, Johann; in searching other forums I'velearned that grinding is the usual method, but the surface grinder to
which I have access may not have a long enough bed; may have to try
planing it; in reply to Norman, I haven't seen any reference to
South Bend having hardended beds on their lathes in the 1930's and
the various dents and dings on the ways from 70 years of use would
certainly refute your contention
> Hy there,on
> Scraping off 0.013" on the whole length of the bed will drive you
> nuts, try the planer, measure twice and cut once.
> Be careful with the holddowns, I once watched a guy shaping a small
> lathe bed. He flipped it over on a pair of 1-2-3 blocks, cut the
> stands to equal height with the shaper and then, he flipped it back
> over again.
> This makes setup easier. He used holddowns in the middle of the bed
> the cross braces (4 or 5 equally spread over the whole length) andget
> small jacks underneath to push the bed up again.
> If this does not work (don´t hesitate, you got a few more cuts to
> it right...), junk the bed and buy a new one. Cut the 90° guide inthe
> same setup. Try to match the saddle by equal cuts to the left andfactor
> right of the bed. Don´t forget you have to shorten the cut by a
> of 0,707 if you cut in a 45°angle. To see what you do, make a sketch
> which is scale 10:1 and the try to draw and measure toolfeeds and
> angles. Please do this in advance.
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