almost every iron shaft set I found were bent. What is the cause?

[tanawat_y]

I have seen so many steel shaft bent in the tip section. It's like almost 70% off the set I've seen.at least 1 shaft in a set(used shaft). What cause this? Maybe your shaft is bent too.

just look closely.

these are 3 shafts I owned. As you can see it's little but noticeable.

[jvincent]

This is common in all KBS shafts because they don't reinforce the tip section.

[tanawat_y]

Actually they are PX LZ ,DG S300 and DG AMT

[kwcsports]

I've changed my shafts probably 4 times over the last 25 years. Same iron heads just new sets of DGS300's. Lots of them were slightly bent. I think that hitting the ground 10000 times a season over 5 -6 years, they are bound to bend a little. I never noticed anything until I removed them.

[hardpan1]

Hitting off mats.

[hwturner17]

Interested to know the effect of a shaft bent like that. It's gotta screw up the lofts and flight

[RogerinNewZealand]

Compared to others seen yours are fine. But its a key reason i use TrueTemper .

Know im safe!

[Colonel_Steelhead]

Every iron Ive ever had adjusted for either loft or lie at Golf Galaxy puts a bend in the shaft like that, no matter the brand. I bought my own lie machine and haven't had a problem since. Could be how they use the tool or just negligence/inexperience, I don't know. So if you've had the irons adjusted, that could cause it. I've also never bent one on my own through playing, but then again, I'm not GolfWRX or even tour level swing speed either.

[Golfrnut]

That is bent above the hosel line. That DOES NOT come from a bending machine, don't care how bad you are at using one....

[Colonel_Steelhead]

Well ALRIGHTY then....

[rufus mangler]

Very hard thin/skulled shots.

[tannyhoban]

This is not as common as you make it out to be, certainly not at 70%. That bend would be noticeable looking down the line if you held the club parallel to the ground.

 

[dmeeksDC]

It is not common in ALL KBS shafts. That’s false.

[jvincent]

I've seen it in every model I've ever tried. Which models aren't susceptible?

[dmeeksDC]

I have only heard that complaint about the C Taper. But I have not experienced it myself and I’ve played several of their shafts. I’m not even sure it’s a design flaw vs a golfer flaw. A bent tip is a result, we can’t assume the design is the cause. If someone thinks a shaft tip should never bend no matter what, I don’t think that is reasonable.

I have seen players with bent tips on all kinds of shafts, even Project X Rifles. And as noted here, the OP’s bent tips were all Dynamic Gold. Is the Project X LZ shaft flawed? Doubtful. I would think any tip will bend if it is slammed hard enough into a mat or the ground. If someone repeatedly hammers the ground before the ball, for example, shafts are lightweight steel that could bend, reinforced tips or not. And I’ve seen graphite shafts splinter at the hosel from repetitive force. But Pros are not bending 70 percent of their shaft tips so if that is happening, it’s not the shaft design.

KBS iron shafts win a lot of professional tournaments worldwide. True Temper (DG, Project X), KBS and Nippon are all frequently in the winning bags. Pros would not play KBS or, in this case Dynamic Gold, if they believed they have a design flaw that puts them at a disadvantage.

[Loose_Ferrule]

This shouldn't have anything to do with one shaft manufacturer vs another. It can happen to any shaft.

This typically happens when a player plays with lie angles that are not correct for them, particularly if the irons are too flat and the club comes in toe deep.

[Socrates]

I've seen guys put the bending bar so one end is on the ferrule. It happens.

[jvincent]

I've seen it personally on KBS Tours and Tour 90s in addition to C-Tapers and the original Kim Braly designed ProjectX, not the True Temper version.

You are right, all steel shafts can bend but KBS shafts are more prone to it because Kim Braly, the KB in KBS, has a design philosophy of not reinforcing the tip section of his shafts. You'll see a lot more bent tip threads with KBS shafts than others.

[Socrates]

Back a few years ago when I was doing a lot of repairs, I never had a set of irons that had KBS shafts in them, that DIDN'T have some or all bent tips. Most don't even realize it until you roll them on a flat surface in front of them. As far as Tour players, they change clubs and shafts so frequently that they likely never notice it. That and they hit it in the middle 99% of the time. One of the reasons players like the KBS shafts is that they don't reinforce the tip section like TT and they like the softer feel.

Any shaft tip will bend if you hit the club poorly enough and long enough. With KBS it just happens very quickly. They don't even question it. Call/email them with a complaint and replacement shafts will be sent to you. Many threads on this topic and there are guys who have sent shafts in multiple times.

[BIG STU]

A lot of it no matter the brand is hitting off mats sitting on concrete pads will cause this. I have a hitting net and mat at the house, My mat is on sand since I live at the beach. every now and then I have to pull it back and level the sand with the flat part of a landscape rake. I flat refuse to hit my clubs off of mats mounted on concrete

[Golfrnut]

Have to unfortunately agree on the KBS deal. Seen it with 90s, Tours, Tour-Vs, and C-Tapers.

With that being said, I haven’t seen them refuse to replace any of them either. They have stood behind their product, just a bit puzzling that they haven’t tried to rectify the issue either that I am aware of.

[denkea]

One of the reasons players like the KBS shafts is that they don't reinforce the tip section like TT and they like the softer feel.

 

Can you explain to me how steel iron tips are reinforced? TT vs any others?

 

[Socrates]

Not a metallurgist, but I have to assume it is a combination of metal composition, wall thickness and heat treating.

[denkea]

All steel shafts start out as a coil of strip steel. All the same thickness (with a minute tolerance). All are the same metal composition. The Butt and the tip are the same thickness steel. The tip stiffness comes from the taper and/or first step dimensions.

[Socrates]

That's an over generalization about the metal composition. I'd bet that KBS has different metal compounds from TT and likely within each company, different shafts (DG, PX, Tour C-Taper, etc..) have different metal compounds within them allowing them to get different feels and performance. Tip and overall shaft stiffness comes from a combination of wall thickness and diameter not just taper and first step length.

[denkea]

Yes. Different models of shafts from various companies will differ with metal content. What I was refering to is that ALL steel shafts, from all the companies, start out as a coil of strip steel of various widths and one thickness.

Wall thickness doesn't change from butt to tip.

Different models WILL have different wall thickness but will not vary within the same shaft.

[jvincent]

Wall thickness doesn't change from butt to tip.

 

I'm going to have to check this, but I'm pretty sure that wall thickness changes.

 

[Socrates]

@denkea Wall thickness doesn't change from butt to tip.Different models WILL have different wall thickness but will not vary within the same shaft.

That is flat out wrong. The wall thickness at the tip is much greater than the wall thickness at the butt.

[Valtiel]

I'm also pretty sure this is how Nippon achieves their varying profiles with the Modus shafts?

[gmr04]

I'd like to see what process they use to get that variation. To do that to exact specifications blows my mind.