Re: [CAD_CAM_EDM_DRO] Horzontal Mill cnc conversion

Jon:

Thanks... just the information I need.

Robert

----- Original Message -----
From: "Jon Elson" <elson@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, August 27, 2003 10:12 PM
Subject: Re: [CAD_CAM_EDM_DRO] Horzontal Mill cnc conversion


>
>
> Robert Williams wrote:
>
> >To anyone:
> >
> >Is Kerney & Treacer Model 1 1/2B, sprndle taper B&S #9, spendle speed
15-354 RPM suitable for hobby use?
> >
> >
> >
> I'm replying off-list, to avoid getting yelled at by Bill.
>
> Umm, it depends on what your hobby is, I guess. If you want to rebuild
> or make medium-large steam engines, then it might be a great tool! If
> you want to make miniature R/C engines, or something like that, it might
> not be very useful. The 354 RPM top speed is a big worry. I rarely run
> tools that slow. I am working on some high speed spindles, as my
> Bridgeport's
> 2720 RPM top speed is too slow for me. Running a 1/8" carbide end mill in
> aluminum, 30,000 RPM is what is called for!
>
> If there is a way to attach a Bridgeport or other vertical milling head
> to it,
> that may make it a much better all-around machine.
>
> One other thing you need to consider is the condition of the ways. If the
> machine is well worn, it will never perform up to its capability due to
> slop in the table and saddle ways. If the ways are in good shape, that
> makes it a much better candidate. Really think about the size of the
> workpieces you will be working on, as a too-small motion range is a
> situation you'll be kicking yourself about for years.
>
> Oh, it is Kearney & Trecker, and this is a pretty old, maybe even
> historic, machine!
>
> Jon
>
>
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