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Old Oct 29, 2006, 02:21 PM
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Joined Oct 2006
35 Posts
Lathe bed grinding service

I have an Atlas lathe which needs re-building and is going to be the next 'project' after I have sorted out my Centec mill. The mill table ways are worn in the middle. I can't get rid of the slack by adjusting the gib strip because if I do the table tightens up at each end of its travel. So the ways appear to need grinding. I also would like to have the lathe bed ground when I re-build it. The lathe bed is 36" long and the mill table is 25" long.

Several years ago I had another lathe bed ground by a guy on the Holton Heath industrial estate near Poole. Since then his business appears to have disappeared.

Does anybody know of and can reccomend a company which does this type of work?
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Old Oct 29, 2006, 02:38 PM
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jlh45 hi, if it were me i would first check your gib strip on the mill table for slight distortion, they do tend to go slightly out of true, after they have been trued up on a surface grinder you may find this was the cause of the problem, another way is to purchase some ground flat stock as near to the size as the old gib strip and try that, if an exact size cannot be sought then buy a size a bit thinner and take up on the gib adjusment screws, dont forget the gib strips are meant to wear out this saves the table ways, the gib strips are always made of a softer material than the table ways.

bill
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Old Oct 29, 2006, 06:11 PM
ravensworth2674
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Re: Lathe bed grinding service


billL5A wrote:
> jlh45 hi, if it were me i would first check your gib strip on the mill
> table for slight distortion, they do tend to go slightly out of true,
> after they have been trued up on a surface grinder you may find this
> was the cause of the problem, another way is to purchase some ground
> flat stock as near to the size as the old gib strip and try that, if an
> exact size cannot be sought then buy a size a bit thinner and take up on
> the gib adjusment screws, dont forget the gib strips are meant to wear
> out this saves the table ways, the gib strips are always made of a
> softer material than the table ways.
>
> bill
>
>
> --
> billL5A
> ------------------------------------------------------------------------
> billL5A's Profile: http://www.rcgroups.com/forums/member.php?u=3D120307
> View this thread: http://www.rcgroups.com/forums/showt...php?t=3D589658


Bill,
Not withstanding the comments about gibs, I assume that Atlas is
a flat bed job.

This means that it can be Blancharded on the top if the head can be
removed.
I have had two or three Myfords done this way.
In no way does it equate to putting it into a slideways grinder but the
cost may only be about =A335-40.
Once the top has been done, it is a lot easier to scrape a reference
and do the rest of the job.

Does this help?

Norm

Old Oct 29, 2006, 06:11 PM
ravensworth2674
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Re: Lathe bed grinding service


..Can I re-direct this. Sorry Bill!

This Old Fart needs specs!

Norm

Old Oct 31, 2006, 12:11 PM
russell eberhardt
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n/a Posts
Re:Lathe bed grinding service

Hi
I guess by "mill slide" you are referring to a boring table fitted in place
of the standard compound rest assembly.

The most likely cause of the problem is that the dovetail ways on the saddle
are worn in the middle of the travel. This can be corrected by anyone with
a decent size milling machine and a dovetail cutter.

The bed is a different matter.

Russell
Old Nov 01, 2006, 02:20 PM
Registered User
Joined Oct 2006
35 Posts
Quote:
Originally Posted by billL5A
jlh45 hi, if it were me i would first check your gib strip on the mill table for slight distortion, they do tend to go slightly out of true, after they have been trued up on a surface grinder you may find this was the cause of the problem, another way is to purchase some ground flat stock as near to the size as the old gib strip and try that, if an exact size cannot be sought then buy a size a bit thinner and take up on the gib adjusment screws, dont forget the gib strips are meant to wear out this saves the table ways, the gib strips are always made of a softer material than the table ways.

bill

Hello Bill

Thanks for your advice - it sorted the problem with the Centec.

When I checked the gib I found it was slightly marked where the lower edge of the dovetail was bearing on it and the thickness varied by about a thou over its length.

Not having a surface grinder I spent half an hour rubbing it down by hand on wet and dry paper and parafin on plate glass. On re-assembly it adjusted so the table moves smoothly through its full travel.

Now I can start on the Atlas where I still would like to get the bed ground.

John
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