AL:
You know I do recognize that need you
around more to help me keep my sanity!!!
TW
-----Original Message-----
From: Al Taylor
[mailto:[EMAIL PROTECTED]
Sent: Monday, July 28, 2003 1:26
PM
To: [EMAIL PROTECTED]
Subject: RE: ShopTalk: old Dynamic
iron head
Being an older person, starting to read Tom's reply
sent my head spinning. I thought I was in a time warp or forgot what year
it actually was. Further investigation has me off the pills and back to
normal. Of course Tom meant the 1994 catalog and I clearly know he didn't
start at GS in 2003. Almost did me in Tom. You have to be careful
of us who retain sanity with brittle finger nails. ;-)
Al
At 11:23 AM 7/28/2003, you wrote:
Pat:
I can answer that one The model #2003 Dynamic weighted
investment cast irons from the Golfsmith 2004 catalog was a model that I
inherited and did not design. I came to GS in May of 2003 and while a lot
of the new models for 2004 were my first designs for the company, this one was
a carry over from before. But I know and remember the model. The
reason that it is so easy to bend is two fold. For one, this is a fully
offset iron in the area of 7-8mm of offset that also has a thin dimension at
the very base of the hosel where the hosel curves into the blade. That
means far less thickness of metal to have to bend and less resistance for the
force of bending for loft and lie. Second, most iron designs that have
such offset and such a thin base of hosel area are normally investment cast
from 17-4 stainless so that there is less chance of the thin area down at the
base of the hosel happening to bend from hard fat shotsor hard hits behind the
ball on a driving range mat. This one was done in 431, which while much
more resistant to bending that a softer stainless like 18-8 or 303/304, will
then have far less resistance to your loft and lie bending because of the thin
hosel section area. So when you look at ANY iron and evaluate it
for ease or difficulty of bending, the first thing is the material but just as
important is the design of the area of the head where the bending has to take
place. Anytime you have considerable offset on an ironhead, you will
almost always get a much thinner dimensional section where the base of the
hosel fans into the blade so this will mean easier bendability, but that can be
counteracted if the head were to be made from a much less ductile material.
In this case you have a slightly more ductile steel with 431 combined with the
thinner base of hosel section so that you get easy bending even though you are
thinking of 431 being tougher to bend from your experience with other iron
models.
There is also one more thing that comes into play for sure
and that is the heat treatment process that is used on the steel from whatever
foundry made the heads. Virtually all metals used in the manufacture of
ironheads will change their mechanical properties depending on the heat
treatment process that is employed after the head is formed. Normally, if
you choose a heat treatment procedure that uses lower heat, you get higher
strengths and with that, less elongation or ductility of the metal for the
heads would be more difficult to bend. Or if you use a heat treatment
process that uses higher temperatures in the ovens, you get lower strengths and
a lot more elongation and ductility and the heads will be very easy to
bend. For example, with common 17-4 stainless if the heat treatment is
done at 900degs C, you can push the yield strength up to 180,000 psi and with
that, the elongation down to under 15% which would mean you would have a
heckuva time getting a 1 degree bend. But if you do the heat treat up at
1150 degrees C, you would lower the yield strength to 85,000 psi and move the
elongation up over 22%, which would make it bend pretty easy in
comparison. Most foundries use a common std heat treatment unless the
designer of the heads specifically tells them what he wants. Therefore,
the ease of bending on these had to be because of the normal 431 bendability
being reduced in your feel by the much thinner base of hosel area in the heads
design.
Hope this helps,
TOM W
-----Original
Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Sunday, July 27, 2003 6:49
AM
To: [EMAIL PROTECTED]
Subject: ShopTalk: old Dynamic
iron head
I
asked this question about a week ago and don't know if it ever went thru, if it
did, my apologies. Ten years ago I built my first set of clubs with Golfsmith's
Dynamic weighted irons Model #2003 from the 1994 catalog. Recently I left my PW
out on the course and whom ever found it never turned it in to the club house.
Would anyone out there have one or know where I could get one? If anyone is
familiar with this model( aside from Tom Wishon ), this iron is 431SS with a
floating firing pin and it is VERY SOFT and Easley bendable up to at least 5*.
First club I ever lost and I would like to keep as a set if possible. TIA
Question--Tom
or anyone else? Could anyone explain why this Iron is so easily bendable? Is it
because it has a 2" long hosel?
Pat
McGoldrick On Target Golf
