On a bicycle forum somebody asked now to cut spoke threads, which are
#2-56. A quick Google search turns up this die on Amazon, sold by
Smallparts. The die manufacturer is not given-
http://www.amazon.com/Adjustable-Pro.../dp/B000FMYH8Y

Note that the description says {"#2-56 Round Adjustable Three Pronged
Carbon Steel Threading Die, 7/32"" Die Diameter"}

what is that (7/32" die diameter) business in there??? Is that an error
in the description, or is there dies with that small of an OD? A #2
screw is about .086", and 7/32" is a lot larger than that.... but not a
whole lot larger, I am thinking. ?:|

I know you can get tiny die sizes in 3/4" / 19mm, but I am wondering if
this dinky size really exists.

The smallest round die stock that Smallparts sells is a Union
Butterfield that is designated as a "D2" size.... but I can't find
anyplace that tells what the "D" sizes of these stocks are?

DougC wrote:
On a bicycle forum somebody asked now to cut spoke threads, which are
#2-56. A quick Google search turns up this die on Amazon, sold by
Smallparts. The die manufacturer is not given-
http://www.amazon.com/Adjustable-Pro.../dp/B000FMYH8Y


Note that the description says {"#2-56 Round Adjustable Three Pronged
Carbon Steel Threading Die, 7/32"" Die Diameter"}

what is that (7/32" die diameter) business in there??? Is that an
error in the description, or is there dies with that small of an OD? A
#2 screw is about .086", and 7/32" is a lot larger than that.... but
not a whole lot larger, I am thinking. ?:|

I know you can get tiny die sizes in 3/4" / 19mm, but I am wondering
if this dinky size really exists.

The smallest round die stock that Smallparts sells is a Union
Butterfield that is designated as a "D2" size.... but I can't find
anyplace that tells what the "D" sizes of these stocks are?

I thought spoke threads are usually thread rolled as they are highly
stressed. Looking at a typical spoke will show that the thread is larger
than the spoke diameter itself. See
http://www.amazon.com/HOZAN-Hozan-Sp...4380363&sr=8-1

People and fractions.. that description probably looks correct to the person
who wrote it.. 7/32"" WTF is in/in?

I haven't a clue wrt D-sizes.

As David points out, spoke threads are commonly rolled, and I wouldn't want
to be riding a bike which had the threads die cut.

--
WB
..........


"DougC" wrote in message
...
On a bicycle forum somebody asked now to cut spoke threads, which are
#2-56. A quick Google search turns up this die on Amazon, sold by
Smallparts. The die manufacturer is not given-
http://www.amazon.com/Adjustable-Pro.../dp/B000FMYH8Y

Note that the description says {"#2-56 Round Adjustable Three Pronged
Carbon Steel Threading Die, 7/32"" Die Diameter"}

what is that (7/32" die diameter) business in there??? Is that an error in
the description, or is there dies with that small of an OD? A #2 screw is
about .086", and 7/32" is a lot larger than that.... but not a whole lot
larger, I am thinking. ?:|

I know you can get tiny die sizes in 3/4" / 19mm, but I am wondering if
this dinky size really exists.

The smallest round die stock that Smallparts sells is a Union Butterfield
that is designated as a "D2" size.... but I can't find anyplace that tells
what the "D" sizes of these stocks are?

My Small Parts (my wife always got a kick out of that name) catalog lists
the 2-56 die as having OD of 13/16". I don't remember where I got my 2-56
die, but it also measures 13/16".
-Dave

--
http://plumpe.home.mindspring.com
email:
ANTI-SPAM: To email, replace "lastname" with "plumpe"
"DougC" wrote in message
...
On a bicycle forum somebody asked now to cut spoke threads, which are
#2-56. A quick Google search turns up this die on Amazon, sold by
Smallparts. The die manufacturer is not given-
http://www.amazon.com/Adjustable-Pro.../dp/B000FMYH8Y

Note that the description says {"#2-56 Round Adjustable Three Pronged
Carbon Steel Threading Die, 7/32"" Die Diameter"}

what is that (7/32" die diameter) business in there??? Is that an error in
the description, or is there dies with that small of an OD? A #2 screw is
about .086", and 7/32" is a lot larger than that.... but not a whole lot
larger, I am thinking. ?:|

I know you can get tiny die sizes in 3/4" / 19mm, but I am wondering if
this dinky size really exists.

The smallest round die stock that Smallparts sells is a Union Butterfield
that is designated as a "D2" size.... but I can't find anyplace that tells
what the "D" sizes of these stocks are?

On 2011-12-20, DougC wrote:
On a bicycle forum somebody asked now to cut spoke threads, which are
#2-56. A quick Google search turns up this die on Amazon, sold by
Smallparts. The die manufacturer is not given-
http://www.amazon.com/Adjustable-Pro.../dp/B000FMYH8Y

*Not* what you want for something as hardened as a bicycle
spoke. There are special tools for rolling the thread -- which displaces
material from the root of the thread to the crest -- to make up for the
fact that the diameter of the spoke is too small to otherwise make a
full depth 2-56 thread.

Note that the description says {"#2-56 Round Adjustable Three Pronged
Carbon Steel Threading Die, 7/32"" Die Diameter"}

what is that (7/32" die diameter) business in there??? Is that an error
in the description, or is there dies with that small of an OD? A #2
screw is about .086", and 7/32" is a lot larger than that.... but not a
whole lot larger, I am thinking. ?:|

That looks too small even for the thickness of the die.

I know you can get tiny die sizes in 3/4" / 19mm, but I am wondering if
this dinky size really exists.

Well -- assuming that the image is truly it (which it is not,
since it says "10-24" in the face of the die), and working from the
diameter of the #2 screw (your 0.086"), and it looks like the diameter
of the die is about 6X the diameter of the thread. So if it were truly
a photo of the 2-56, it would come out about 0.516" diameter (probably
1/2" is close enough, or maybe the 3/4"). A 10-24 would be 0.190"
diameter, so the die would be about 1.140" -- more likely the 1"
diameter.

So -- unless you want to get

The smallest round die stock that Smallparts sells is a Union
Butterfield that is designated as a "D2" size.... but I can't find
anyplace that tells what the "D" sizes of these stocks are?

Don't worry -- you don't want those. Look for thread rolling
dies for the spoke threading.

Good Luck,
DoN.

--
Remove oil spill source from e-mail
Email: | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---