There's a new wire service called Clubmaking Wire. Email updates on
from manufacturers related to clubmaking. Info is at
http://clubmakingwire.com
I also do a semi-regular update called The Clubmaker Report. It's
mainly my customer list and I send out specials and updates on new
products
Dave,
Well, that depends on how you define NBP. We've had this discussion before.
You choose to define NBP as the softest flex plane in a shaft and the spine
as the stiffest plane, excluding shaft geometric anomalies from
consideration.
A number of us disagree with that assumption and believe
Corey Bailey also referred to other anomalies in a shaft. Besides
curvature (or residual bend) what other anomalies are we talking about
here? How do they affect the behavior of a golf club when it is
swung? And how is it that a 'spine finder' identifies them? The articles
I have read only
Thanks, Corey,
I did a quick check on several of the graphite shafts I have in the garage
and they all appeared to have some runout when I rolled them in my spine
finder (I didn't try and isolate whether it was shaft curvature or
out-of-round butts). It was less than some of the steel shafts
Don,
Yes this will do the job as accurately as any method I'm aware of.
BTW, some of us do believe that a spine finder does find the correct NBP,
that it should be a combination of flex differential and shaft geometric
anomalies that determines this location.
Dan Neubecker
[EMAIL PROTECTED]
Bernie,
The irons play better than before but my handicap has come down from 12 to 8
this year. I'm playing more and striking the ball better so it's difficult
to say if the S1-COG alignment has helped. It certainly hasn't hurt. Every
club that I have aligned with the COG, i.e., S1-COG with the
Hi Tom,
It depends on what theory you believe in. If you believe that a spine
finder can find the correct NBP location as I do, then you absolutely can
get the NBP exactly at the COG.
Bernie's post on NBP to COG alignment contained a quote from an experimental
set I made up. I did not have any
Dan,
I also believe you are right because it works for me. I only had a chance to
do it for a couple of people and they say the same thing.
If it's not, then the shaft puring process GS is using is wrong too.
I have a pured shaft from GS that I use as a demo, my NF shows the same
shaft
Alan,
How about shaft concentricity problems where the hole in the center of the
shaft is offset a bit from center, resulting in different shaft wall
thickness around the shaft. I'm sure you are aware that they can be
slightly out of round, even if only for a portion of the shaft. Perhaps it
is
Hey, Dan, I like that.:) df
- Original Message -
From: Dan Neubecker [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Thursday, October 09, 2003 8:23 AM
Subject: RE: ShopTalk: NBP-COG
Alan,
I appreciate that you are an engineer. I work with several daily, who
happen to be my
In a message dated 10/9/03 9:50:24 AM Eastern Daylight Time, [EMAIL PROTECTED] writes:
My
983K with the Aldila NV is getting a wear spot high in the middle of the
face.
Now let's see if this wear spot is in the right place.
You will need a simple tool: A golf ball drilled part way through and
At 09:04 AM 10/9/03 -0500, Dan Neubecker wrote:
How about shaft concentricity problems where the hole in the center of the
shaft is offset a bit from center, resulting in different shaft wall
thickness around the shaft. I'm sure you are aware that they can be
slightly out of round, even if only
Jim , what kind of procedure did you use given the fitting of a shaft in a
titleist 975 series head ?
Ray
- Original Message -
From: Thomson, Jim [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, October 08, 2003 4:12 PM
Subject: RE: ShopTalk: NBP-COG
I have reshafted my three
anyone ever dry install the head on a shaft , clamp it in a freq. meter with
the toe up ,face pointing to an imaginary target [right handed club] and
twang it to see if you could the head to run flat or flat line ? if you
rotate the head on the shaft , then reset it toe up until you you can get a
Gentlepersons,
I have been lurking on this NBP-COG Fest and lacing the level of
technical acumen the protagonists and antagonists possess have become
totally confused! However, its too juicy to not dive in; so here's at it!
I read some time ago that Golfsmith did some
Hi Alan,
If you suspend those graphite shafts on two points (V-blocks, etc.) you
will note some run-out but usually less than observed in steel
shafts. Obviously (not trying to preach to the choir here) the differences
in materials and manufacturing processes will produce different results in
Ray,
You just described the process that I use for assembling every club. What
it tells me is that when the club is brought in line at the bottom of the
swing, it will flex in a linear planeI think.
:-)
CB
At 10:53 PM 10/8/2003 -0400, you wrote:
anyone ever dry install the head on a shaft
Jim,
My 983K with the Aldila NV is getting a wear spot high in the middle of
the face.
Interesting in that I also thought the impacts on my woods with NBP-COG were
slightly higher on the face, though centered. Didn't notice it on irons as
much. Maybe toe droop because NBP more in the vertical
Corey and Ray,
Looks to me like you are describing FLOing a shaft. Dave T seems to feel FLO
could be important for spine location, Phil Talamonti of Advanced Shaft
Dynamics feels FLO is unimportant and has no use in aligning a shaft
properly. Guess it's up to us non-engineers to try it and see.
Another question for RK:
I read the collection of messages about drill bits and reamers from RK from
a link on clubmaker online, and took away some really good reference
information. What is the correct style of reamer to use for cleaning or
enlarging hosels - the style you would order from a
- Original Message -
From: Dave Tutelman [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, October 08, 2003 2:19 PM
Subject: Re: ShopTalk: NBP-COG
The question(s) were in the first paragraph and in the last paragraph. First
question was is the spine at the top or bottom of the
Well, we can agree to disagree on this point. All I'm saying is that its
virtually impossible, given our assembly practices, to set a head on a shaft
at a precise spot. Its simple to visualize. Imagine 360 degrees marked
around a shaft tip that's .335 in circumference. The lines would be atop
one
At 12:48 PM 10/9/03 -0500, Bill Douglas wrote:
Gentlepersons,
I have been lurking on this NBP-COG Fest and lacing the level of
technical acumen the protagonists and antagonists possess have become
totally confused! However, its too juicy to not dive in; so here's at it!
I read some time
Uh;
I didn't mention anything about NBP-GOG. What I said was its virtually
impossible to assemble a club with the hard spot in a precise position. I
have a spinefinder and a freq machine. I find hard spots - spines, and soft
spots - NBP's easily. No problema. I don't deny the existence of spines,
Hi Dave et al
I keep seeing my name pop up in these endless emails every now and then. I
agree with everything Dave has written. My own very limited testing
indicates alignment of the bend has little effect. Alignment of a true spine
does have an effect. I like the N plane in the target planes.
John, all, I've been busy fixing a design change that I had tested my normal 100 times but I forgot one test and it turned out to be a very bad idea so I guess I'm going to have steel to eat for a while, lucky for me a good friend found it for me so all is not lost. I'll bet your all
I recall a fitting table in a previous Golfsmith
catalogue but of course can't find it when I need it. Admittedly it was simple
but quite useful as a base for length calculations.
Does anyone know where to find such a
guidefor kids on the web??
TIA,
Ben...
Hi guys, First of all I would like to thank John, Dave Bernie and Mr.kennedy
for an interesting week!!! My wife is Pissed because if im not in the shop
Im here reading these profound theories. I think I am going to sign out for
about three months because i just got in an order of 30 ttdgr-300
- Original Message -
From: tflan [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Thursday, October 09, 2003 4:05 PM
Subject: Re: ShopTalk: NBP-COG
Well, we can agree to disagree on this point. All I'm saying is that its
virtually impossible, given our assembly practices, to set a head
this link should take you there.
http://www.sheagolf.com/juniors/junior_fitting.asp
- Original Message -
From:
Ben Cameron
To: ShopTalk
Sent: Thursday, October 09, 2003 6:34
PM
Subject: ShopTalk: Kids Fitting
Chart/Guide
I recall a fitting table in a
On Thu, October 9, 2003 at 2:23 pm, Dave Tutelman sent the following
SPINE is the stiffest plane of a shaft in bending. NBP is the most
flexible plane. The concept of plane is the first area of
disagreement among the protagonists. Some say that it is possible for
the stiff side to be 180*
Ben:
Here is some information for fitting young
juniors that might help you. This is the most recent revision that I have done
to the junior fitting work that I had done in the past. TOM WISHON
Junior Fitting Recommendations
Height Weight Driver 5-iron
9-iron/Wedge
42 35
At 04:41 PM 10/9/03 -0700, David Rees wrote:
On Thu, October 9, 2003 at 2:23 pm, Dave Tutelman sent the following
SPINE is the stiffest plane of a shaft in bending. NBP is the most
flexible plane. The concept of plane is the first area of
disagreement among the protagonists. Some say that it
Hi Dave, I'm going to take a swing at describing bending and the concept of
neutral bending axis. I may simply confuse the issue, but it's already
well confused so here goes.
Imagine a perfectly symmetrical shaft clamped rigidly and horizontal on one
end and an imaginary vertical plane
Dave T and others:
Can a shaft exhibit severe wobbling (non FLO) on the pure spine plane?
Can a shaft exhibit severe wobbling (non FLO) on the pure N1-N2 plane?
The few tests I've seen to determine the effect ... majority of these
tests are absurd and designed by people who have no insight for
Hi Bill
Regarding your comment difference in shaft performance vs. Spine at one of
the 4 cardinal positions, I assume from this (and correct me if I'm wrong)
that GS tested SSTPUREPPOPtm at 3, 6, 9, 12 o'clock positions. Is this what
you implied? If that is the case, and if their testing
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