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[GMCnet] Maybe Not GMC -- Parser Drill [message #284556]

Tue, 11 August 2015 09:11

Ken Henderson

Messages: 8726
Registered: March 2004
Location: Americus, GA

Karma: 9

Senior Member

This isn't necessarily GMC-related, though someone here can probably find a
use for it. Just too good to not pass on. I'll bet Jerry Work's the only
one here to whom it's not a surprise:

http://makezine.com/2015/08/05/old-tech-drills-any-shaped-hole/?utm_source=MakeNewsletter+20150811&utm_medium=email&utm_term=&utm_content= button&utm_campaign=newsletter
or
http://goo.gl/tH7h1L

Ken H.
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach

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Re: [GMCnet] Maybe Not GMC -- Parser Drill [message #284560 is a reply to message #284556]

Tue, 11 August 2015 09:52

Harry

Messages: 1888
Registered: October 2007
Location: Victoria, BC CANADA

Karma: 3

Senior Member

Now I know.
Thank you.

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Re: [GMCnet] Maybe Not GMC -- Parser Drill [message #284572 is a reply to message #284556]

Tue, 11 August 2015 11:19

Matt Colie

Messages: 8547
Registered: March 2007
Location: S.E. Michigan

Karma: 7

Senior Member

A thing that shocked me was when I found out that there were TWO Different kinds of "Square Hole" Drills.
I'm not talking about a morticing set used in wood working that is an auger inside a square chisel. (Google it, if you don't know, and you can find it.)

There is one type that is a drill with three straight flutes. Did you ever notice that a two flute drill can make a triangular hole?
Same game plus one, but the drill is turned buy a loose linkage so it can move. They sound like a mistake.

The other type has moveable flutes that are controlled by an exterior cam. These sound better, but only work well on thin material.

Water, wire EDM and laser cutting have made both of these obsolete. Just as well.

Matt

Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

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