[TheForge] star drill reworking

[David E. Smucker]

Yes, Old star drills are most likely from the family of S type tool steels. 
If old, more likely S1 or S5, newer ones more likely S7.  S1 and S5 are 
water hardening.  S7 air.

Dave
----- Original Message ----- 
From: "lee robbins" <naturadoc1 at yahoo.com>
To: <theforge at mailman.qth.net>
Sent: Tuesday, January 29, 2008 10:03 AM
Subject: [TheForge] star drill reworking


> Larry Brown wrote:
> lot of old star drills were s series steels  and are
> quickly converted
> to
> slitting chisels etc and are real cheap at flea
> markets as no one
> remembers
> what they are for. I have heard some great
> descriptions
>
> I second the question as to typical composition,
> having also gotten a number of these at auction.
> Are they  one type of steel throughout so you could
> cut off the star and re-use the shaft as punches?
>
> Lee Robbins
>
>
> 
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