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 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.
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 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.
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 does a tip stiff shaft do?
In most cases, tip trimming a shaft makes it meaningfully stiffer. It also increases torsional stiffness, known as “torque,” which is a shaft's resistance to twisting. On the other end of the shaft is the handle, which is also generally trimmed some amount when building a golf club.
How do you measure a stiff shaft?
There are numerous ways to measure shaft flex. The most common way is to clamp the butt end of the shaft, attach a weight to the tip, displace it, and measure the CPM (cycles per minute) or frequency that the shaft oscillates. This can also be done in reverse – clamp the tip and weight and displace the butt.
What is frequency in a golf shaft?
Frequency is an absolute measure of the flex of a shaft. It is defined as how many times per minute a shaft oscillates. The units of frequency measurement are known as cycles per minute, or cpm. A shaft with a higher frequency is stiffer than one with a lower frequency.
Do any pros use regular flex shafts?
Kramer's 2006 “Golf Magazine” article cites a survey showing that just 2 percent of PGA Tour players and 10 percent of PGA Champions Tour players used regular flex shafts in their irons. He also notes that PGA Tour swing speeds average 110 mph, so the players favor a stiffer shaft to better control the club.
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.
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.
What does 6.0 mean on a golf shaft?
StiffRegular – 5.0. Regular Plus – 5.5. Stiff – 6.0. Extra Stiff – 6.5. Extra Stiff Plus – 7.0.
What does 60 mean on a golf shaft?
60 Gram Shafts – Who Are They For? 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.
How do you determine the flex of a golf shaft?
Start by using a launch monitor to analyze your golf swing speed. If your swing ranges between 85 mph and 95 mph then you should start with a regular flex. If your swing speed is faster than 95 mph, then you should try a stiff shaft.
What are frequency matched shafts?
Frequency matching shafts only measures the butt flex of the shaft and allows the club maker to perfectly match a set of golf clubs. It is up to the club fitter to match a shaft to the golfers swing needs. Golf shaft manufacturing processes, while having improved by leaps and bounds, are still imperfect.
How do you use a golf shaft frequency analyzer?
0:453:42Golf Shaft Frequency - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe end of this golf shaft. Once we secure the weight onto the golf shaft is if it were a club. HeadMoreThe end of this golf shaft. Once we secure the weight onto the golf shaft is if it were a club. Head. You can screw that on. Then we're able to put it into this machine.
What does the clubhead represent?
What this represents is the conversion of bending energy stored in the shaft into kinetic energy (motion energy) of the clubhead as its velocity increases dramatically.
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 does it mean when a golf shaft is bent?
A bent shaft indicates that the shaft has stored energy which it "wants" to release. The greater the amount of bend, the more energy is stored within the shaft. 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.
radd
Ive got a speeder 757 stiff in my driver its cpm is 280.id like a shaft that is slightly softer than the speeder 757 so if i got a cpm of say 275 would that be softer. I notice some x shafts are 275 while some s flexes are 280 285 does that mean the s is stiffer than the x. cheers
haribo
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.
radd
I got my reading from the fujikura website so obviously im wrong. my driver is a 510tp retail can you tell me roughly what will the cpm be
DoubleAA
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radd
so if you increase swing weight does that decrease cpm ie make the shaft weaker.
haribo
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.
Eveleth
A little information I received from the Fujikura Rep. Fujikura uses a 7.25 inch butt clamp with a 201 gram head weight in their CPM testing as opposed to a 5 inch butt clamp for most manufactures. The net result is their CPM rating would be 12-13 cycles higher becuse of this.
How much CPM does a wood shaft gain?
Wood shafts often respond with only 1 CPM for each 2/8", so if we tipped it to the max, 1.50'" we will most likely only see a gain of 6 CPM about 1/2 a flex class, but the shaft WILL NOT feel like that, it will feel "different" and not like a softer version of 1 flex letter stiffer.
Who invented the FCM shaft?
KBS vs RIFLE. Kim Braley was one of the inventors of the FCM system together with his father, so its no surprise he uses that flex system on some of his KBS shaft models, but be aware of that KBS still used "the old system" with a 2.5" inch clamp (and by that different CPM values on the chart.
