From: "Richard Schwartz" 
To: 
Reply-To: "Richard Schwartz" 


You can also use such a drill press for making small lenses for home made
eyepieces.   With a simple jig, you can use it to edge home made mirror
blanks.   And if the thing only costs $49, you don't worry about getting a
little water on it.   Just towel dry it when you are done and spray it with
WD-40.

. . . Richard

----- Original Message -----
From: "Kreig McBride" 
To: 
Sent: Wednesday, April 16, 2003 6:41 AM Subject: Re: ATM drilling aluminum


>
> Nice small drill press for a sale at Sears for $49 with 1/2" chuck. Not a
> bad price. I think you an find these small drill presses at other
locations
> as well.  Considereing the number of holes an ATM will drill in a
lifetime,
> there should be a law requireing ownership.   A drill press will give you
a
> vertical hole but you still need to do accurate layout and a center punch
is
> needed.
>
>  (No I am not promoting Sears, in fact i personally dont shop there unless
I
> have to.)
>
> Kreig
>
>
> -----Original Message-----
> From: Ralph Seguin 
> To: Eric Smith 
> Cc: atm{at}shore.net 
> Date: Tuesday, April 15, 2003 10:54 PM
> Subject: Re: ATM drilling aluminum
>
>
> >
> >You would be much better off using a friends drill
> >press or mill to get a nice vertical hole.
> >
> >Better yet, use this as an excuse to get a drill
> >press...
> >
> >If you can do so, then use a center drill first to get
> >a nice small pilot hole and then you can go with the
> >full sized bit.  Set the speed right and use sharp
> >tools.
> >If you are going for a specific and accurate hole
> >diameter, use a slightly undersized bit (google search
> >on drill chart) and then a reamer.
> >Or, you could use a boring head to get an accurately
> >sized hole.
> >
> >Or, use a friend's CNC mill and use G83 :-)
> >
> >If you really have to do it with a drill motor by
> >hand:
> >I would use a punch/scribe/... to mark the center very
> >carefully.  Make a small dimple that a drill bit will
> >stay in while you start drilling.
> >You could go straight to the large bit, but starting
> >small might be good.  Once you have a pilot hole, you
> >should be able to go with the full sized drill.  The
> >point of the punch is so the drill doesn't dance
> >around.
> >Use cutting fluid to get a better cut and back out on
> >occassion to clear the chips.
> >Try to stay perpendicular to the surface.
> >
> >-Ralph
> >
> >--- Eric Smith  wrote:
> >>
> >> I need to drill a couple of 3/8" holes in 3/32"
> >> extruded aluminum box.
> >> I'd like these holes to end up where I actually
> >> marked them :)
> >>
> >> I do not have a drill press (or much else).  I DO
> >> have a drill motor and a
> >> vice.
> >>
> >> What is the best path to success:  starting out with
> >> a 1/16" hole and
> >> using successively larger bits until I reach 3/8",
> >> or just use the 3/8"
> >> bit straight away?
> >>
> >> I don't want to spoil my stock.
> >>
> >> Thanks,
> >> Eric
> >>
> >>
> >
> >
> >__________________________________________________
> >Do you Yahoo!?
> >The New Yahoo! Search - Faster. Easier. Bingo
> >http://search.yahoo.com
> >
>
>
>

--- BBBS/NT v4.00 MP