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Now, that is interesting. Didn't know
of the existence of such a "tap". Thanks for pointing it out.
Ed
----- Original Message -----
Sent: Wednesday, August 22, 2007 3:09
PM
Subject: [FlyRotary] Re: Tap 'em holes
was [FlyRotary] Throttle Body Nut Ideas
This machinist says: "Why would you want to *do*
that?
Strictly speaking, cut threads - what you get from conventional
taps -
are weaker than swaged threads, such as the rolled threads one
usually
finds on AN class fastener.
So ... if one wants
threads in alumin(i)um, one needs a tool that
displaces the metal, rather
than cutting it. Eureka! Such a tool does
exist - the "fluteless
thread forming tap" E.g.:
http://www.shoprutlandtool.com/webapp/wcs/stores/servlet/ProductDisplay;jsessionid=0000aUcDvp-FmIJrmRkZmUaWieP:-1?productId=27670&langId=-1&storeId=10001&catalogId=10001&parent_category_rn=
Rutland
Tool # 21238428
Good hunting,
Dale R.
COZY MkIV
#1254
Ernest Christley wrote:
Ed Anderson wrote:
Scott, I think the best answer is to simply
tap those bolt holes for the thread size of your bolts. This does a
number of things.
I've been told by a machinist that
tapped holes in aluminum are weak. Any truth to that?
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