Threading a 4-40 rod - what size to start with??

[John Ferrell]

FWIW:
I read in the "Machinery's Handbook" that rolled threads are 30% stronger
than cut threads.
John Ferrell
6241 Phillippi Rd
Julian NC 27283
Phone: (336)685-9606
johnferrell at earthlink.net
Dixie Competition Products
NSRCA 479 AMA 4190  W8CCW
"My Competition is Not My Enemy"


----- Original Message ----- 
From: "Martin X. Moleski, SJ" <moleski at canisius.edu>
To: <discussion at nsrca.org>
Sent: Friday, November 14, 2003 9:10 PM
Subject: Re: Threading a 4-40 rod - what size to start with??


> --On Friday, November 14, 2003 6:17 PM -0600 Keith Hoard
<khoard at midsouth.rr.com> wrote:
>
> >     What size rod do I need to cut 4-40 threads?
>
> 1/8" welder's rod.  "Use a 5-40 and then 4-40 die nut from
> > www.micromark.com..." (Fred McClellan on rec.models.rc.air).
>
> > 2-56??
>
> Dunno.
>
> > I tried cutting threads in some 4-40 threaded rod I bought at the LHS,
> > but it seems the rod diameter is too small to get a good set of threads
> > from using the die.
>
> Right.  The hobby shop stuff usually uses "rolled threads"
> rather than die-cut.
>
> Marty #2874
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