On 2012-10-07, Gunner wrote:
On Sat, 06 Oct 2012 20:32:52 -0700, Larry Jaques
wrote:

Wanna see my 45-degree compression Japanese drillbit? I found it
again the other day. Note the precision twist... It's from the late
'60s, I believe. It was rather startling to feel it deform that day,
but what I found afterward was the most startling.
http://www.homeandgardenhandyman.com...seDrillbit.jpg
The rust is from it sitting on my sink while I did dishes.

Yep -- early Japanese "butter steel" drill bits.

Hmm ... Oxwall -- the vendor of sets of butter steel
screwdrivers, too. :-)

Was this in a hand-held drill motor, or in a drill press? (Or
perhaps and "eggbeater" drill?)

Ever try to duplicate it on other sizes?

Show me yours, boys and girls! minds outta the gutter


I bought a set much like that once in the late 70s. Didnt bend it..but
it sure turned int into a reamer when it unwound the flutes

:-)

The one shown above got a reverse twist between the bend and the
shank. :-)

Enjoy,
DoN.

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