----- Original Message -----
From: "Chris Loiacono" <chris@MAIL2ASI.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Thursday, June 26, 2003 11:05 AM
Subject: Re: [OT] Small, precision drill press


> I'm right in there with Dumore also..an old standard - a bit pricey. An
old
> German Engineer told me they were junk, but I have never found that to be
> true. We uses sensitive presses like the Dumore for drilling and milling
to
> middle layers on multi-wire boards. They will remain tight and accurate
> until someone tries to do heavy work on 'em. They are definitely for the
lab
> and not the shop.
> There are only two models available however....try here:
> http://www.dumore.com/?show=products&part=drill&type=sensitive
>
> Another thing that has worked:
> - when the budget is small, almost any of the small bench-top presses can
be
> used for this. For example, one that works well for me these days is a $59
> Delta drill press sold at hardware stores and home centers. All I did was
> put an upgraded chuck in it and - voila! I have drilled hundreds of holes
> from 7 to 60 mils, the switched over to a circle cutter, then back to
small
> carbides with no problems. Rarely if ever do we break any drills. Of
course
> tramming or squaring the table well and using Vee-blocks for drilling
tubing
> are a big plus. Good methods are often more important than the cost of the
> tools used.
>

Thanks for the info, good stuff.

So you are saying the Delta has a fairly stable shank as you lower it into
the work. That's the biggest problem I find with most presses is that the
shank gets a little wobbly as it is lowered into the work.

I like the Dremel tool, just not sure if the press fixture is steady enough.

Thanks

John
> And another...
>
> When building my pcb machine, the first function was to apply paste from
> syringes. Then I searched and searched for a combination of parts to make
a
> drilling head. (Some out-of-date info & pix: www.clicsystems.com )
> At one point, I tested a battery powered dremel brand tool for which I
made
> a rigid circular clamp, similar to the syringe clamp, but larger (I later
> made an adapter to hold the syringes also with the same clamp.) I
purchased
> dremel's 1/8 collets, which now hold 1/8" shank carbide PCB drills in the
> dremel tool.
> This set-up proved to be dollar for pound, the best. It drills countless
> small holes accurately on center and never breaks a drill. Of course, rpm,
> feed rate, tight 3 axis feeds and good work-holding have a lot to with it
> too. I can't speak for the toy drill press that is sold for dremel tools,
> but I have found that the dremel rotary tools themselves have been getting
a
> bum rap. They are tighter than one would think from all the bad publicity
> they receive.
>
> Too bad there's an ocean betwixt, or I might have volunteered to drill
your
> tubes for you (no off-color punning intended.)
>
> c
>
> >
> > I need to drill very small holes, about .025" diameter. Very
> > short throw, about .050".
> >
> > Could I get a recommendation on an inexpensive drill press
> > and a source.
>
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