[Land-speed] Fw: Drilling teeny holes...

[Ed Weldon]

Forwarded with edits
----- Original Message ----- 
From: "Ed Weldon" <23.weldon at comcast.net>
To: "Glen Barrett" <speedtimer at beyondbb.com>; <drmayf at mayfco.com>; "LSR" <>
Sent: Monday, September 24, 2007 6:28 PM
Subject: Re: [Land-speed] Drilling teeny holes...


> Mayf--Both Glen and Gary are right.
> I've had a good bit of experience with such tiny drills in the #55 to #80
> range.  Pin vises work well on aluminum and brass but naturally requre
> patience.  An old modelers' trick when drilling metal is to poke the drill
> into some beeswax so it fills the flutes.  Provides cutting lubrication
and
> helps to capture chips which otherwise might jam against the flutes and
let
> you overstress the drill.  Drills are impossible to sharpen well enough
for
> metal unless you have a microscope.  Once you've broken it get a new one.
> Well equipped hobby shops are sources for single drills in the 60-80 range
> beyond what you'll find in the hardware stores.  Prices run in the $1-$2
> range.
> On the other end of the scale machine drilling is best done at very high
> speed like 5000-10,000 rpm.  Well beyond what you can get with an ordinary
> bench drill press.  Not to mention that virtually all the drill chucks
> available for these machines, either jacobs type or the quick release type
> won't chuck anything smaller than a 5/64.  There is a tiny jacobs style
that
> is found on miniature drill presses like the one I think Glen has.  It's a
> Jacobs #0 and will chunk down to about .012.  These drill presses usually
> have a sensitive hand feed.  I think you can do this with a dremel tool
> mounted in their drill press accessory if  and that is IF you can find a
> dremel accessory chuck that will hold your tiny drill without excessive
> runout.  I don't use that kind of machine.  I was lucky to find a Dumore
> miniature drill press with a Jacobs 0 chuck at a swap meet a few years
ago.
> Paid $5.00 for it.  Fitted it out with a light and a dimmer switch speed
> control and then proceeded to pay $50.00 for a miniature Unimat vise for
it.
> Still a pretty good deal considering similar albeit higher quality units
> sell new today between $700 and $1600.
> Ed Weldon
>
> ----- Original Message ----- 
> From: "Glen Barrett" <speedtimer at beyondbb.com>
> To: <drmayf at mayfco.com>; "LSR" <land-speed at autox.team.net>
> Sent: Monday, September 24, 2007 5:35 PM
> Subject: Re: [Land-speed] Drilling teeny holes...
> > How thick is the material, what type, hardness, I have a very small
drill
> > press and small tooling vises to hold small parts....... Glen