Shaft insertion

[RIduffer]

Does the depth of shaft insertion impact the stiffness of the shaft? Deeper insertion causes a shaft to play stiffer to flex and shorter insertion drives a looser feel...

[Shambles]

Installing a shaft fully inserted is supposed to let the shaft play true to flex and true to cut. If you want it stiffer, you need to tip it. Partial insertion, on the other hand, will soften the shaft flex, and the amount of softening can be dramatic.

Shambles

[gocchin]

Hi Steve, yes and there are a couple of things to keep in mind. Not only the depth of the shaft insertion ie how deep the bore of the hosel is but the height of the insertion ie a head like the Ryoma has a very long neck meaning the tip of he shaft is much higher from the sole of the club. So two identical drivers could have a similar bore depth of 30mm but one driver has a really long neck design meaning the location of the shaft tip is higher in the head even though the insertion "depth" is the same. This results in a more active tip section in a more soft or looser feel which is the case for Ryoma.

[RIduffer]

This is in reference to the Crazy 435. My builder commented on how high on the shaft the hosel went. That coupled with a shaft I thought I could handle, the QFE Proto 65x all I am getting are fades.

[gocchin]

Yest the bore on the 435 is I think a tad deeper than standard. This is a good example. I had two LY01 Hot driver shafts, one a 435 and another in a Ryoma the different bore depth AND height made the identical specs shaft play like 10+ cpm more in the 435.

[Ian-500]

This is in reference to the Crazy 435. My builder commented on how high on the shaft the hosel went. That coupled with a shaft I thought I could handle, the QFE Proto 65x all I am getting are fades.

Wimp.

[RIduffer]

Low T... It happens with age...

[vincent]

Shambles if do partial shaft insertion will that expose to breakage? Cheers

[Shambles]

Shambles if do partial shaft insertion will that expose to breakage? Cheers

I learned this trick a long time ago, say a couple of decades, and it was done to a steel shafted 8* Mizuno Driver which I very much treated like a sledge hammer. I did not know the shaft was only partially, about half the hosel, inserted until some years after when I pulled the shaft because I needed it for another Driver. I never reinstalled it because the shaft was a bit short, but I think it's somewhere in my junk pile. I do remember that the pro who installed it went to the trouble of using some of his 24 hour epoxy, and might also have dimpled the shaft, though that part I really do not remember.

I ran across this trick again more recently when a friend bought an old Driver with a Roddio on it. The shaft was much too soft for either of us regardless that it frequed way stiff. He offered it to me for dirt and on impulse I bought it, planning to tip the thing. Instead, I installed it on an old 909 D3 and it played much stiffer but is too light to suit me. Turns out that Roddio had been partially inserted to suit an old man. I was planning to install a different shaft on that Driver but ran across an old Royal Collection that ought to suit my current Sonartec fairways so that project will need to wait. :)

It's a very old trick from a time when finding a shaft was more difficult.

Shambles

Edited April 21, 2013 by Shambles

[RIduffer]

Maybe I should just bring it back and have the shaft partially inserted. See if that fixes the issue. How much tip equals 1/2 flex?

[sjdavies47]

Really interesting about the impact of a long neck. How much difference is 10cpm in terms of shaft flex (half a flex)?