A thought on spining or puring shafts...

[metallion]

While look-look-looking I just realized that the shaft will rotate some 90 degrees from top to impact. As I realized that I suddenly lost all arguments for puring and/or spining.

Anyone able to defend puring and/or spining even considering the shaft rotation?

[BerntR]

While look-look-looking I just realized that the shaft will rotate some 90 degrees from top to impact. As I realized that I suddenly lost all arguments for puring and/or spining.

Anyone able to defend puring and/or spining even considering the shaft rotation?

Interesting question that I haven't thought much about.

Let me suggest a few points to consider.

Assume a perfect swing with angled hinging and pure rope handling. Then there will only be centripetal force (from the head upon the shaft) that will bend the shaft. Because the cog of the clubhead is above and behind the shaft (as seen from impact) the bending force wil be downward and forward when the shaft is loaded and it will unload upwards and backwards.

With a perfect hit, things gets more complicated. Centripetal force will still do it's thing. In addition, drive loading will induce a clockwise torque on the shaft as well as a backwards bending in the loading sequence and and in the opposite directions as the club unloads.

Then there's of course what happens in the moment of truth - from impact to separation. I don't know if spining has any part here.

Finally, real life swings might be somwhere inbetween - like swing with a strong extencior action through impact. And imperfect pp alignments.

[bbftx]

... is to get all your clubs spined in the same orientation so they all behave in the same way through your swing.

[phillygolf]

Where's EC?????????

[EC]

Patrick,

As you know, I am a proponent of utilizing shaft orientation technology and will not play with any club that has not been "spined". While with some shafts the effect might be negligible, others may be impacted significantly. In essence, I feel that it insures that poor results are swing related and not equipment related. As bbftx states, it's another part of the formula in achieveing uniform behavior throughout your bag. As stated by Tom Wishon, one of golf's leading equipment researchers and developers after being involved in the original pioneering of the technology that led to SST puring,
"I can tell you that most definitely we were able to make the same shaft hit the ball with visible differences in shot dispersion for different installation orientations in the same exact head."
The whole spining, Pureing, floing, orientation debate can get quite technical and I recommend going to the Wishon site for a complete review.

EC

[Jim.Cook]

Gentlemen,
I've done it and it works.
You can talk about it until you are blue in the face but the only is to actually experience it. I made two 5 irons with everything the same except... one with the sine off and the other with the spine properly positioned.
When I asked my pro to hit the one that was off he felt "something wrong". Then he hit the proper club and it felt correct. It seems that people with about a 12 handicap could feel it.

It is so easy and quick to do I make all my clubs that way and don't charge for it.

[redan]

The Wishon site is a good source of info, so is Pat Dempsey's http://www.horsepowergolf.com which has a pretty clear article about why he spines clubs he assembles. He is a long drive champion, brother of the old Baltimore Oriole catcher, and an excellent club maker.

Only so called neutral spining is legal for clubs in USGA R&A sanctioned events. See the rules appendix or the USGA website.

[cjgolf]

Gentlemen,
I've done it and it works.
You can talk about it until you are blue in the face but the only is to actually experience it. I made two 5 irons with everything the same except... one with the sine off and the other with the spine properly positioned.
When I asked my pro to hit the one that was off he felt "something wrong". Then he hit the proper club and it felt correct. It seems that people with about a 12 handicap could feel it.

It is so easy and quick to do I make all my clubs that way and don't charge for it.

does this only apply to graphite or do u do steel shafts as well

[golfguru]

Spining works for both steel and graphite.

[Fred Brattain]

The Wishon site is a good source of info, so is Pat Dempsey's http://www.horsepowergolf.com which has a pretty clear article about why he spines clubs he assembles. He is a long drive champion, brother of the old Baltimore Oriole catcher, and an excellent club maker.

Only so called neutral spining is legal for clubs in USGA R&A sanctioned events. See the rules appendix or the USGA website.

I know Pat, and play clubs that he made for me, including a MARVELOUS driver. If you get out near LA, you should go see him. Nice guy, great clubfitter and DANG but he can hit it a long way.....

ps pretty good singer, too.

Obi WunPutt