[modeleng] Re: 'oles
- From: Allen Messer <al_messer@xxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Mon, 7 Mar 2005 06:09:37 -0800 (PST)
Well, I have used the following method successfully a
few times: Pop a center punch where you want the hole,
making a good deep dimple. Gently touch the back-side
of the dimple to the grinding wheel, which will anneal
that spot enough for the proper sized drill bit to
finish the hole.
Al Messer
--- Charles & Dorothy Brumbelow
<cbrumbelow@xxxxxxxxxxx> wrote:
> My comments and article reference posted earlier had
> to do with spring
> material of a clocklike nature, Al. Although EDM
> would work with any spring
> one could get into position; some would take longer
> than others. Charles
>
> > Are we talking about "clock Spring" material, or
> > "Automobile leaf spring" we have scrounged?
> >
> > Al Messer
> >
> >> Spring steel can usually (noticed I said USUALLY)
> be
> >> drilled by running the
> >> drill very slowly, using plenty of thread cutting
> >> oil and keeping a steady
> >> and relentless pressure against the drill bit.
> If
> >> the drill ever makes a
> >> turn without removing metal the steel will
> instantly
> >> case/work harden and
> >> all forward progress will cease. This same
> system
> >> works on stainless steels
> >> that work harden when drilling.
> >>
> >> Unka Jesse
>
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