What is a CPM in golf clubs?
CPM literally stands for "Cycles Per Minute" and is the most practical measurement unit to describe the resonant frequency of a club after assembly. Why is this important to golf?
What is the CPM of a golf shaft?
A True Spec Golf fitter measures the CPM of a golf shaft. Simply put, CPM stands for “cycles per minute,” which measures the frequency of a golf shaft.
How important is CPM when matching shafts?
That means if your 7-iron measures 304 cpm, then your 8-iron should be 308 cpm. In conclusion, CPM can be a very effective way to match shafts, but not as effective in determining true flex.
What does 255 CPM mean on a golf club?
A12: A golf club at 43" would oscillate in a frequency analyzer at 255 CPM to be a 5.5 flex designation. A 43" club oscillating 265 CPM would be a 6.5 flex designation. If you drop the "2" in "255" and "265", the relationship becomes apparent.
What CPM is stiff shaft?
A shaft with a higher frequency (more CPMs) is stiffer than one with a lower frequency (fewer CPMs). A shaft with a frequency of 7.0 is very stiff and a shaft with 2.0 frequency is very soft.
How is shaft CPM measured?
0:522:24Measuring Shaft Frequency - YouTubeYouTubeStart of suggested clipEnd of suggested clipOver the edge of the shaft. That way everything fits perfectly. And from here. It's just a flick. SoMoreOver the edge of the shaft. That way everything fits perfectly. And from here. It's just a flick. So as this one reads through our first go around it came in at 281 CPM. You want to try to get a view.
What swing speed requires a stiff shaft?
between 97 and 104 mphStiff – This range is still considered fast, but you most likely won't be out on Tour anytime soon. If you're between 97 and 104 mph with the driver, you need a stiff flex. Regular – Now we are getting into the range where a majority of recreational golfers fall, and also where many LPGA pros fall.
Is a 60g shaft stiff?
The shafts in the drivers of most golfers are probably in the 60 gram bracket. These shafts are light enough to help with speed yet heavy enough to give that feeling of more stability during the swing. This shaft weight will be beneficial to most golfers out there.
What does FCM mean in golf?
5.5 is just the flex, the same system is used today. FCM stands for frequency coefficient matched.
What do we mean when we say CPM?
Cost per thousandCost per thousand (CPM), also called cost per mille, is a marketing term used to denote the price of 1,000 advertisement impressions on one web page. If a website publisher charges $2.00 CPM, that means an advertiser must pay $2.00 for every 1,000 impressions of its ad.
What flex do I need for my irons?
Should You Use Regular or Stiff Flex Shafts?6-iron Carry Distance6-iron Swing SpeedShaft flex (all clubs)< 130 yards60 – 70 mphSenior Flex131 – 155 yards71 – 80 mphRegular Flex156 – 175 yards81 – 90 mphStiff Flex> 176 yards91 + mphX-Stiff FlexApr 13, 2021
How do I know if my driver shaft is too soft?
When To Move To A Stiffer Shaft?Feels 'whippy' in your hands.Feels too light.Your ball is ballooning in the air.Your ball is behind your pitch mark when you hit your driver.You ball spins to much on the greens when you approach with your irons.Your accuracy has dropped.You start hitting hooks.More items...
How fast should you swing a 7 iron?
An average golfer will swing a seven iron about 75 mph. This number can change based on the weight of the club and if it is steel or graphite. The faster you swing a seven iron, the further it will go. If you can swing at about 85 mph, you will see distances closer to 165 yards.
Is 75 gram shaft too heavy?
75 and 85 Gram Shafts And Who They Are For? These are generally for your stronger and better players, as they will be generating a lot of clubhead speed, the weight of the shaft helps to keep the clubhead under control during the swing.
What gram shaft do I need?
In general, golfers with slower swing speed and tempo can and should play a lighter shaft. Golfers with very fast speeds and tempo should play heavier shafts. Driver shafts typically weigh 55-60 grams for men and 45-50 grams for ladies. Iron shafts can be as light as 55 grams in graphite, and 130 grams in steel.
What weight shafts do pros use?
It is why the most popular weight for driver shaft-weights on the PGA Tour is still in the mid-60-gram range, with some players having tried shafts less than 50 grams. But more and more, there are exceptions -- players opting for driver shafts decidedly heavier than most of their tour brethren.
How to tell if your CPM is too low?
If you saw that the shaft was bent backward at impact, that would tell you that the CPM was too low for this club. You must either use a stiffer shaft, or reduce clubhead mass (ie, reduce "swingweight").
Why is the shaft important in golf?
Because the purpose of the shaft is to store energy during the backswing and the beginning of the downswing with the intention that it release energy during the middle and end of the downswing... all with the objective of maximizing the clubhead speed at the moment of ball impact.
Why change the flex of your shaft?
You'd probably elect to change the flex of your shaft rather than the swingweight, because changing the swingweight might also change your degree of comfort with the clubs.
Why does a straight shaft have no energy?
A straight shaft has no stored energy because it has released any stored energy it previously had. Let's apply these concepts to the golf swing. To propel the golf ball as far as possible, you want to deliver as much energy as possible to the ball at the moment of impact.
How does the club head work on a downswing?
During your downswing, the rotational energy of your body is transferred to the club through your hands and then through the grip and through the shaft, ultimately causing the clubhead itself to begin orbiting your shoulders on its way towards the ball.
What happens if you let go of the clubhead?
That's energy storage! Sure enough, if you let go of the clubhead, it will release that energy and will straighten, albeit after a few wiggles up and down.
Is it easier to work with cycles per minute or cycles per second?
It turns out that it is easier to work with cycles per minute rather than cycles per second. You'll see why in a moment. But in the case of our five-iron, the five cycles per second convert to precisely 300 cycles per minute, abbreviated 300 CPM.
When looking at the stiffness profile, ideally finding the next step in the iteration process (other than random?
When looking at the stiffness profile, ideally finding the next step in the iteration process (other than random) requires an understanding of how different profiles have effected your interpretation of the feel of the shaft as well as how it effects the swing and results in past iterations. Then use that understanding to pick the next profile to try.
Does GolfShaftReviews.com have IE charts?
golfshaftreviews.com keeps detailed IE charts but requires a subscription to access it. The base subscription only gives numberless grafts so not really all that useful (IMO). You can look at and compare profile graph shapes but don't think you can compare different shafts on the same chart (someone can correct me if I'm wrong). And the higher level (much more useful) subscription is pretty expensive (also just my opinion).
Is stiffness an accurate way to judge a shaft?
So that means is that it is not an accurate way to judge how a shaft will feel. Now it's fine in the context of a particular shaft model.
Is shaft flex worth it?
On paper it may be the right one but the variances in each shaft make it difficult to find the perfect shaft for your swing. This is more proof for those on the fence about getting fit. GO GET FIT! It is well worth the price, especially if you can find a reputable fitter.
Is shaft frequency misleading?
For more details, this is a good article to read. Wishon: Shaft frequency can be misleading
Do OEM shafts have butt and tip CPM?
A few shaft OEM's web sites have butt and tip cpm specs, a few might even have butt, mid, and tip cpm's. But those are only really good to compare shafts from that OEM. They don't do much to help compare shafts between different OEM's since there is no standard way to get those measurements.
Is it accurate to judge how a shaft feels?
So that means is that it is not an accurate way to judge how a shaft will feel. Now it's fine in the context of a particular shaft model. But once you get a butt frequency that works well for shaft A, then there is no guarantee that the same cpm will work well for a completely different model.
What is a cpm?
cpm (cycles per minute) is one way to measure the stiffness of a shaft. 10 cpm equals one full flex, let's say from s to x. With 280 cpm (depending on shaft length and swingweight) your driver seems to be extra (X, probably more) stiff. Going to 275 would make it half a flex softer.
What is the FCM number for a rifle?
5.5, 6.5, etc are Rifle FCM numbers but they've come to be equated with shaft flex as it is more intuitive. They do use a 2.5" clamp so the freq numbers you get from your local clubmaker will probably differ by approx 17cpm as most use a 5" clamp. Fuji and Aldila use something in the 7" range.
What does 5.5 mean on a golf club?
What do numbers like "5.5" and "6.5" mean? A12: A golf club at 43" would oscillate in a frequency analyzer at 255 CPM to be a 5.5 flex designation. A 43" club oscillating 265 CPM would be a 6.5 flex designation. If you drop the "2" in "255" and "265", the relationship becomes apparent. These numbers of 5.5 and 6.5, etc. are all based on a club at 43" and every shorter club of the same flex designation will have a CPM increase of 4.3 CPM per 1/2". Every longer club will have a decrease of 4.3 CPM per 1/2". For example, if a club at 43" were 265 CPM, a club of the same flex designation at 42-1/2" would be 269.3 CPM (265 + 4.3). A club at 44" of the same flex would be 256.4 CPM (265 - 8.6). All three clubs are 6.5
How much bore-thru for titleist drivers?
Correct. Titleist drivers have a bore-thru of about 3.5". (TM blind bore's are only 1.5" to 1.75 inches!!!) 3.5 inches is so much it not only changes the flex drastically, it also changes the characteristics of a shaft. Fuji for instance has a 3 inch long protective sleeve build into the tipps of all their shafts. This alone gives you an idea how much the Titleist bore-thru can change a shaft. (and the reason why Fuji built that Titleist Speeder shaft.) Because of this most Pro's (Titleist does it too) turn it into a blind bore, by leaving a false tipp (cut-off tipp from an old shaft) at the bottom of the bore-thru. Makes it so much easier to keep the flex under control.
Does swingweight make a shaft play weaker?
Yes, increasing the swingweight makes a shaft play weaker.
Is a CPM machine good?
The way i see it, CPM machine is good if you know what you got from that machine and they are only good to build a consistent set . After that is the knowledge of the Clubmaker about every each one of shafts carracter they carry.
What is the speed of a golf club head?
This category ranges from extremely light and soft 45g shafts to common 65g shafts. The club head speed should be below 105mph. However, it is impossible to make a general statement because every driver swing is very individual and it also plays a big role how a player "loads" and "releases" a shaft. Therefore, this value is only a rough guideline.
How much does a golf shaft weigh?
Especially the weight of the shaft plays a big role here. In our comparison, the weight goes from 45g to 85g - whereby the "typical" shaft weight is rather between 50g and 65g. The majority of players will be in this range.
What shafts have 55g?
It is noticeable that there are also shafts with 55g in this category, such as the Accra TZ5 S or the Kiyoshi Black 55 03. Both shafts are actually stiff and particularly stiff for their weight class. Ventus Blue and Black are also in this range with the 6 X.
What is the shaft profile of a Fujikura Ventus?
The Fujikura Ventus, for example, has a very special bending profile in which the middle part of the shaft is extremely soft, while the tip is particularly stiff.
Why are driver shafts so interesting?
Driver shafts are so interesting because they have the exciting task of providing maximum speed transfer while minimising dispersion. It is no secret that the right driver shaft can make a big difference. It's not for nothing that professionals are constantly testing and trying to get the maximum out of them, whereas with iron shafts they often ...
What is the Armrq 47 shaft used for?
They are mainly used by ladies and seniors who have difficulties accelerating the club. The Armrq 47 is the shaft used by Honma Beres. As expected, this shaft is extremely soft. The special thing about this shaft, however, is the low torque.
How much higher is a stiff shaft?
The rule of thumb for most manufacturers is that the difference between the flexes is about 10 CPM. So the CPM for a stiff shaft is roughly 10 higher than for a regular shaft. This is at least the case with Ventus, Motore, Vizard, Accra and Mitsubishi.
How to find the frequency of a club shaft?
To find any shaft’s true frequency, the shaft is placed in a clamp with the clubhead dry fit on the end of the shaft. Then the club maker pulls the shaft to make it oscillate. This oscillation is measured in cycles per minute (cpm’s). The faster the shaft oscillates the stiffer the shaft is said to be.
What type of shafts do golf clubs use?
The build of your set of clubs is just as important as the fit. Just ask any Tour player. At KZG we only use parallel tipped shafts which are designed so that a club builder can perfectly match your set of golf clubs to a tolerance of +/-1cpm. By trimming a little more or less off the tip end of the shaft they can achieve the perfect flex on each golf club. Taper tipped shafts, which are used by all of the big manufacturers, are designed to be mass produced and dropped into a particular club’s head and the cut to length i.e. a 9 iron shaft for a 9 iron head. These are difficult if not impossible to match perfectly.
What is a taper tipped shaft?
Taper tipped shafts, which are used by all of the big manufacturers, are designed to be mass produced and dropped into a particular club’s head and the cut to length i .e. a 9 iron shaft for a 9 iron head. These are difficult if not impossible to match perfectly.
How many cpms should a 7 iron have?
For example, if a 6 iron is at 300 cpm’s the 7 iron should be at 304 cpm’s.
Is golf shaft manufacturing imperfect?
Golf shaft manufacturing processes, while having improved by leaps and bounds, are still imperfect. This means that if you go to the local golf retail store and buy a set of “off the rack” clubs and later get the shafts measured for frequency, you will find that the vast majority of those sets will not match.
Do two different types of shafts measure at the same frequency?
This, however, does not mean that two different types of shafts which measure at the same frequency will play the same. Shafts have different bend profiles – which means they are stiffer or softer in different areas of the shaft.
Do you need to contort your swing to suit your KZG golf clubs?
Each club in your bag will then “feel” and perform the same … no need to contort your swing to suit your clubs!
What is PCS in golf?
Inspired by the research done by the Braly’s, a club makers organization, the PCS, endorsed and taught frequency based club making to its many, many members. it was a time when shaft design was not as complex as it currently is and when frequency instruments were one of the few tools available to club makers for measuring shaft stiffness.
Who owns Royal Precision shaft?
The Royal Precision shaft company was purchased by True Temper and with that purchase was the numeric stiffness rating patent. Here is a look at how that system is currently applied.
Is shaft frequency used in stiffness?
Shaft frequency is not of much use in evaluating shaft stiffness. The problem for club makers and fitters who recognized the importance of shaft profiling was that there was not an affordable EI instrument until I designed and manufactured one. They used the frequency instruments they had. As with all technologies, instruments and expertise evolves. Frequency profiling and frequency rating of shaft stiffness were an attempt by club builders to reverse engineer shaft knowledge not shared by the shaft companies. Affordable EI instruments have closed the knowledge gap between the shaft engineer and the club fitter.
Who invented the rate of oscillation of a shaft?
Dr. Joe Braly introduced club makers to using the rate of oscillation of a shaft (frequency) to understand its stiffness. In the 80’s he did research on the PGA tour. He used a frequency instrument to measure the shafts used by the tour players. From this research, he developed a formula for the stiffness of ratio of the different irons in the set. The ratio he found was 4.3 CPM (cycles per minute) per one half inch of length of club.
Do golf shaft stiffness rates work across brands?
The systems we have to rate golf shaft stiffness do not work across brands or even across models within brands. Most experienced club fitters use their experience to understand golf shaft stiffness. Many use some systematic method, most often frequency, to rate the shafts they work with.
How Does Shaft Flex Impact Your Golf Game?
The shaft flex of your golf club has an immense effect on the game’s outcome as a whole. From high irons to wedges and drivers, you have to make sure they have the correct flex for trajectory, accuracy, and distance.
What happens when a golf shaft is too stiff?
A too flexible shaft causes a nasty hook or a pop-up, whereas an extra stiff shaft pushes the golf ball onto the next fairway.
What Is Shaft Flex?
Shaft flex is the degree to which the shaft will bend or flex during the swing. A more flexible shaft bends easily during the swing and has the potential to produce a longer-ranged shot.
How to Choose the Shaft Flex for You?
You can know the correct flex for your shaft by evaluating your swing at a golf equipment store. They’ll check all kinds of things like ball speed, distance, clubhead speed, spin, and many other factors. They also try several shafts in the same driver head to give the most accurate results.
How many different shaft flex categories are there?
These are the five different shaft flex categories. You can select the right shaft flex as per your requirements.
Why is it important to have the right golf equipment?
Every golfer knows that having the right set of golf equipment is essential to unleash the best performance on the course. Players often underestimate the shaft flex and use the golf shafts that were not suitable for them.
Why is my golf ball too low?
Golfers using a too stiff shaft and having a lower swing speed tend to abrupt the clubface angle at the point of impact, which pushes the ball too early. It results in hitting the golf ball too low.
