Re: die size for 1/16" rod

[Richard S Griffith]

Matthias, the Machinist book has tables.  
Tap and die 1-64 or 1-72 is a much closer fit.  A 2-56 is easier to find,
but it might be a little loose.  If losseness works for your need, try
2-56.  Hobby stores and mail order are 2 places I use to get these. 

Numbered pilot drill bits give you a better fit. 
Dick Griffith, New Britain, CT
On Thu, 19 Aug 2004 22:55:45 -0700 (PDT) Matthias Warmbold
<[EMAIL PROTECTED]> writes:
> Hi,
> 
> I got a 1/16 brass rod (K&S brand) on which I would
> like to put a thread. Neither the shop nor K&S has
> provided me with information on which die is suitable
> for this size. I spent some time surfing the net and
> assume that a 00-80 die would fit. To make the female
> thread, I assume that I have to use a 3/64 drill bit.
> 
> Can anyone from this list confirm whether my
> assumptions are correct? K&S sells a 00-80 tap and die
> which no local dealer has on stock. Are they of good
> quality or should I order it from somewhere else? Are
> there any tables on the Internet where one could look
> up the die size for any given rod?
> 
> Matthias
> 
>


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RE: die size for 1/16" rod

[Casey Sterbenz]

Matthias,
Typical numbered tap and die sizes are based on a simple formula.  A "zero" 
die, such as a 0-80 size, is for rod that is 0.060" diameter.  For each 
number size above or below zero, add or subtract 0.013" to the diameter.  
So, a 1-72 die is for rod that is (0.060" + 0.013"), or 0.073" diameter.  A 
2-56 die is for rod that is (0.060" + 0.013" + 0.013"), or 0.086" diameter.  
A 3-48 die is for rod that is (0.060" + 0.013" + 0.013" + 0.013"), or 0.099" 
diameter.  For smaller dies, such as 00-90, it is (0.060" - 0.013"), or 
0.047" diameter rod.

To determine the drill size for a tapping hole, subtract (1 divided by 
thread pitch) from the diameter of the wire.  So, for a 0-80 tap the tapping 
hole diameter would be (0.060" - (1/80)").  For a 1-72 tap the hole diameter 
would be (0.073" - (1/72)").  For a 2-56 tap the hole diameter would be 
(0.086" - (1/56)").

For your 1/16" rod which is nominally 0.063" diameter, a 1-72 size die will 
work as long as shallow threads are acceptable.  A 1-72 nut may be a little 
loose on rod of that size.  The rod will be a loose fit in a 1-72 tapped 
hole.  There are other tap and die standards such as the British BA and ME 
series and various metric series that may be a better match for 1/16" rod.  
Try a Google search for taps and dies.  You should come up with several hits 
that list the various thread series with the nominal diameters that are 
intended to be used with each die.   I'm on the road this week so I don't 
have access to my web site lists that have the tables of tap/die/wire 
diameters on them.

Casey Sterbenz

From: Matthias Warmbold <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
To: Multiple recipients of sslivesteam <[EMAIL PROTECTED]>
Subject: die size for 1/16" rod
Date: Thu, 19 Aug 2004 22:55:45 -0700 (PDT)
Hi,
I got a 1/16 brass rod (K&S brand) on which I would
like to put a thread. Neither the shop nor K&S has
provided me with information on which die is suitable
for this size. I spent some time surfing the net and
assume that a 00-80 die would fit. To make the female
thread, I assume that I have to use a 3/64 drill bit.
Can anyone from this list confirm whether my
assumptions are correct? K&S sells a 00-80 tap and die
which no local dealer has on stock. Are they of good
quality or should I order it from somewhere else? Are
there any tables on the Internet where one could look
up the die size for any given rod?
Matthias

Re: die size for 1/16" rod

[Kevin Strong]

For 1/16" rod, you'll want to get a 1-72 die. I mistakenly bought a 0-80 
die for the same purpose, and quickly learned the error of my ways. It 
was only after I was ejumaketd in this regard that I received an e-mail 
from a friend informing me that he used a 1-72 die for his threaded 
1/16" rod. (All was not lost--I found some .057" steel tie-wire that 
works beautifully with the 0-80 die, so I was back in business. This 
wire, incedentally, is the stuff that construction workers use to tie 
rebar togther for concrete work.)

You can find the dies at www.microfasteners.com . You can also get your 
nuts, bolts, washers, taps, and many other necessary items from them.

Later,
K