Re: [CAD_CAM_EDM_DRO] Re: Cost estimate for machining of acme screws

Hi, well i found that a tool post grinder just amplified any looseness and
by the time i got it squared away i could have had it done by hand, wrapped
and shipped to the customer. Yea a tool post grinder is ok when you need to
fix a taper but for production work -useless in my book, a good lathe with a
keen ground and honed edge tool (how many hone the edge these day?)
and a familiar operator should be able to hold finnish and size! Not on a
used 9 inch South bend but maybe a Good 10ee Monark, Hardinge made to do the
job. cul brian f.

----- Original Message -----
From: <bjammin@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, November 18, 2002 8:06 AM
Subject: Re: [CAD_CAM_EDM_DRO] Re: Cost estimate for machining of acme
screws


> At 09:45 PM 11/17/02 -0600, you wrote:
> >If you really want a slight interference fit for the bearings, then
> >you'd better be prepared for
> >grinding it with a toolpost grinder. There's no way to repeatably get
> >.0005" tolerance with
> >a pointed cutting tool!
>
> I do it repeatedly. Have held +/-.0002 on ODs for lots of ten-twenty.
>
>
>
> Regards, Hoyt McKagen
>
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