For example, a shaft may have a CPM reading of 245 cpms in one orientation and when the shaft is rotated 90 degrees, the CPM reading may be 250, a difference of 5 CPMs. We measure the difference in the load at a particular point on the shaft and the difference between the high and low load.
Full Answer
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 does a true spec Golf fitter measure the CPM?
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. To obtain this measurement, a fitter or club builder places the grip end of a golf club into a clamp, then pulls on the tip section of the shaft and releases it to make it oscillate.
What is the CPM difference between different shaft flexes?
This 70 cpm difference is arbitrarily divided up into ranges and assigned the flex designations we are used to seeing, but bear in mind that the various shaft brands divide this range up differently, and in any case, there is no exact cpm for any particular shaft flex, but rather, a cpm range.
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 CPM for golf shafts?
Simply put, CPM stands for “cycles per minute,” which measures the frequency of a golf shaft. To obtain this measurement, a fitter or club builder places the grip end of a golf club into a clamp, then pulls on the tip section of the shaft and releases it to make it oscillate.
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 is hard stepping a golf shaft?
Stepping shafts is a method of reshafting that focuses on a flex between the specific designations, say, between a regular and a stiff flex. "Hard stepping" would make a shaft stiffer, "soft stepping," more flexible.
How much does soft stepping change flex?
Soft stepping, putting the 5 iron shaft in the 6 iron, moves the flex of the shaft about 1/3 of the way toward the R flex shaft. A double soft step, 4 iron in the 6 iron will move the flex another 1/3 toward the R flex. The weight of the shaft changes very little with stepping.
Is 6.0 a stiff shaft?
Have you ever wondered what the number designation on your Project X shaft means? You know, the 5.0, 6.0, 6.5 and so on printed on the shaft. These numbers correspond with flexes from “regular” to “extra stiff plus”.
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.
Does soft stepping make a difference?
A soft stepping iron has a larger sweet spot and offer better control of the golf ball. What is this? Soft Stepping golf irons are easier to hit because they have a larger sweet spot. Soft Stepping golf irons produce more consistent shots and control the ball better.
What is a stepped shaft?
Stepped shafts are widely used in drive trains. They are generally holding large gears and cams, which are key elements in power transfer. Mostly supported by bearings at the end, the shaft experiences bending loads, axial thrust and torsional loads. The shaft must have greater strength to withstand these loads.
What is a soft stepped shaft?
Soft stepping is the process where club shafts are made slightly more flexible. For example, if you had a stiff flex, after soft stepping the club it would become closer to a regular shaft and easier to hit if a player had issues with it being too stiff.
Does soft stepping add length?
For instance, when you soft step your irons, each of them gets a bit longer. If you are able to adjust this so that the lengths are still the proper fit for your game, you can order them directly from the manufacturer this way.
Does soft stepping increase spin?
"The main reason for soft stepping or hard stepping is to change the feel of the shaft for golfers who really want their shafts to feel just right. The second reason is to try to change the launch angle and trajectory of the shot or to reduce or increase spin. A ½ inch can exhibit the beginning of a 'feel' difference.
What is Tiger stepping?
0:585:39TIGER STEPPING / TIGER WOODS WEDGE BUILD SETUP - YouTubeYouTubeStart of suggested clipEnd of suggested clipIs taking a shaft in this case the dynamic gold shaft that really only runs is only made down to aMoreIs taking a shaft in this case the dynamic gold shaft that really only runs is only made down to a nine iron. So whether you're putting it in a nine or a pitching sand gap lob wedge.
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 is shaft frequency?
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.
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.
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.
Does the shaft of a golf club have energy?
As long as the shaft is still bent, it still contains energy that it can deliver to the clubhead. But at the instant the shaft straightens out, it has delivered every last ounce of energy into the clubhead and the head is travelling as fast as it will get during this swing.
What is CPM in motors?
CPM (Cycle Per Minute ) Tolerance: Unfortunately, there are no standards in the industry as to how CPM is determined as far as the length of clamp used. Some manufacturers like Mitsubishi Rayon, do not publish the CPM numbers for their shafts.
What is shaft testing?
When testing golf shafts, there are a number of tests that are used in the industry to assure the quality, characteristics, durability and performance of a golf shaft. Each shaft manufacturer and some equipment manufacturers have tests that each shaft must pass in order to be released for sale.
When the shaft is correctly oriented in respect to its inherent flex plane, it will resist twisting to any other
When the shaft is correctly oriented in respect to its inherent flex plane it will resist twisting to any other position when placed under load and will remain stable through impact. It is as if the club-head is riding on rails through the impact zone.
What is shaft flex?
There is no standardization in the golf industry as to shaft flex which means that one brand’s stiff flex shaft might be the equivalent of another brand’s regular flex shaft, and a particular brand’s regular flex shaft might be the equivalent of another brand’s senior flex shaft, and so on.
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.
What is the maximum tip trim on a 7W?
Woods is NOT designed to be "CPM matched", and todays woods often has a very limited length of the tip section, typical 3.0" only. Since insert is normally 1.25" and the ferrule takes a little, the maximum tip trim on wood shafts is considered to be 1.50" or equal to tip trim for a 7W.
Is AMT softer than DG?
AMT MIGHT play a tad softer than the chart for some models because the AMT #6 iron is softer than the classic DG #6 iron, but the chart is only made to give the ball park withing half a flex to make it easier to see what options we actually have for AMT.
Who first discussed shaft oscillation frequency?
The concept of using shaft oscillation frequency was discussed in the 1968 book, “Search for the Perfect Swing” by Alastair Cochran and John Stobbs. “Search for the Perfect Swing” is one of the first explorations of golf technology.
Is shaft frequency used to measure 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.
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 far up from the tip of an iron shaft?
Starting at 11 inches up from the tip, the measurements then are made at 5-inch spaced positions up from the tip end of each shaft, ending at 41 inches up from the tip. Because iron and hybrid shafts are shorter in raw length, their measurements run from 11 inches up to 36 inches up from the tip end of the shafts.
Is there a standard for how stiff a shaft is?
There are no standards for exactly how stiff any of the flex letter codes are. Charts like this provide no quantitative measurements of exactly how stiff any shaft might be. In fact the ONLY bits of information on a typical chart like this which can be helpful are the WEIGHT and the TORQUE.
