Re: [CAD_CAM_EDM_DRO] Dumb question on the drilling of holes

Guys,
You better be careful. It seems that, in this group, you're only
supposed to make your tools go from Point A to Point B, to Point C, and
you're not supposed to worry about whether or not the tools cut or drill
into your material. <Big tongue in cheek> I guess I'm going to be banished
to Siberia for this one.

Marv Frankel
Los Angeles

----- Original Message -----
From: "Dave Dillabough" <dgd@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, October 24, 2002 11:58 AM
Subject: Re: [CAD_CAM_EDM_DRO] Dumb question on the drilling of holes


> You can get 3 flute drill bits that will do almost as good a job as
> drill/ream in one pass. There was a thread about this on alt.machines.cnc
> recently.
>
> At 03:24 PM 10/22/02 -0700, you wrote:
> >Tim,
> > I'm pretty familiar with reaming holes for proper fit, but the
holes
> >I'm talking about, are sometimes so misshapen, they almost look
triangular.
> >They're 1/4" holes, and I've even tried cutting them through with an end
> >mill, and that wasn't great either.
> >
> >Marv Frankel
> >Los Angeles
> >
> >
> >----- Original Message -----
> >From: "Tim Goldstein" <timg@...>
> >To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> >Sent: Tuesday, October 22, 2002 2:36 PM
> >Subject: Re: [CAD_CAM_EDM_DRO] Dumb question on the drilling of holes
> >
> >
> > > Drill bits are well know for making off size and irregular holes. That
is
> > > why you should use a reamer if the fit is important.
> > >
> > > Of course this is easier with CNC when you can get back to the same
spot
> >so
> > > you don't have to keep switching tools.
> > >
> > > Tim
> > > [Denver CO]
> > > ----- Original Message -----
> > >
> > >
> > > > Guys,
> > > > I'm following this subject with great interest. One of the
> >reasons
> > > I
> > > > subscribe to this group, is to learn enough to convert my mill to
CNC. I
> > > > have been fabricating some parts on a mill, using the DRO, and have
run
> > > into
> > > > problems drilling holes. Using certain drill bits, many of the holes
> >have
> > > > come out oversize, and some completely out-of-round. Changing bits
has
> > > > helped, especially if I use a shorter length bit, but I'm going to
> > > > investigate using the 135 degree, or other similar drills. I'm
looking
> > > > forward to a CNC conversion, when I intend to center drill the holes
> > > before
> > > > using the correct drill bit.
> > > >
> > > > Marv Frankel
> > > > Los Angeles
> > >
> > >
> > >
> > > Addresses:
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> > > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
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> > > OFF Topic POSTS: General Machining
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if
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> > >
> > > http://groups.yahoo.com/group/jobshophomeshop I consider this to be
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OT
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> > > List Mom
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> >
> >OFF Topic POSTS: General Machining
> >If you wish to post on unlimited OT subjects
> >goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to
> >reach it if you have trouble.
> >http://www.metalworking.com/news_servers.html
> >
> >http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
> >sister site to the CCED group, as many of the same members are there, for
> >OT subjects, that are not allowed on the CCED list.
> >
> >NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING
> >THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> >bill
> >List Mom
> >List Owner
> >
> >
> >
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>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
>
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
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> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...
> Moderator: jmelson@... timg@... [Moderator]
> URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
sister site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> bill
> List Mom
> List Owner
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>