True Frequency Technology®
True Frequency Technology® is a high level (but easy to use) Excel – Raw Shaft Sorting Program, aimed at simplifying, finding, and defining the Profile and Overall Frequency or ‘True Frequency’ of a full set of raw shafts. This in turn will result in a finely tuned ‘True Frequency’ profiled set of golf clubs. Raw shaft data is compiled in 5″ beam length increments for up to 13 iron shafts and 13 wood shafts.
True Frequency Technology® is now available to Clubmakers everywhere. Please see our Clubmakers Registry page for details on how to purchase the rights to use.
Required: A copy of Microsoft Excel on your computer, a Frequency Machine for shaft profiling and a tip weight – no specific weight is required as this is a sorting methodology. Minimum weight should be 254g.
The TFT sort engine automatically defines and assigns a TFT stiffness value, sorts, and then reorders the raw shafts data by the overall profile stiffness. The sorted data is then plotted in a graphical format for quick visualization. The program then allows you to assign club heads to target either a (1) hard slope or a (2) soft slope. A tip weight is required and should have been supplied with the frequency machine.
Option 1 – Hard slope (TFT default) – The hard slope will increase the total range – or produce a steeper slope. This sort will often yield a more traditional rate of change in the range of 3 – 5 (CPM) for every ½ inch of playing length difference. The softest shaft is assigned to the longest club to help get the ball airborne, and the stiffest shafts are assigned to the wedges for slightly lower ball flight and improved dispersion.
- The softest RAW shaft is assigned to the longest club, and the stiffest raw shaft is assigned to the shortest club, increasing the total flex range of the assembled set relative to the CPM rate of change or curve
- The resultant assembled set will have a stiffer rate of change per 1/2 inch length, with a slightly increased CPM range.
- The steepness of the rate of change or curve will be in direct relationship to the variation found in the raw set of shafts. The greater the variation within the raw set, the greater the final rate of change will be within the assembled set.
Option 2 – Soft slope – The softer slope is designed for those looking to have slightly softer shafts in their wedges (increased spin) and a slightly firmer long iron for a slightly lower ball flight. This soft slope option will often yield a reduced rate of change in the range of 2 – 4 (CPM) for every ½ inch of playing length. The stiffest raw shaft is assigned to the longest club, and the softest raw shaft is assigned to the shortest club, softening the total flex range of the assembled set relative to the CPM rate of change or curve.
- The resultant assembled set will have a softer slope with a slightly decreased CPM range.
- The steepness of the rate of change or curve will be in direct relationship to the variation found in the raw set of shafts. The greater the variation within the raw set, the softer the final rate of change will be within the assembled set.
Both Options 1 & 2 – A “Class A” set of shafts will have very little variation (raw shaft verses raw shaft), and is sometimes attainable by measuring a few extra shafts, then eliminating and replacing the singles with the largest variation. The assembled final rate of change (or slope) will be most affected by the variation found within the set of raw shafts, so naturally the tighter the overall raw profile, the tighter the assembly will be, relative to frequency. A “Class B” or even “Class C” set of shafts will still produce a great set of clubs, but will in all likelihood have a little more variability in the final assembly. True Frequency Technology® rates raw irons sorts by classifications from “Class A” to “Class E.” To get a “Class A” set can be difficult due to manufacturing tolerances and variability, but regardless of the final sort classification, you can be sure you will have a far superior set than that of a random build.
- A hard slope will become an even steeper slope (with an increased rate of change per ½ inch) – when a greater amount of variation is found in the raw sort.
- A soft slope will become an even flatter slope (with a decreased rate of change per ½ inch) – when a greater amount of variation is found in the raw sort.
- In both cases the True Frequency Technology® sorted graphs will display each 5 inch beam length or increment point and its calculated TFT Frequency Value. True Frequency Technology® will organize the raw shaft frequencies through the TFT sort engine, allowing the club maker a final build with tighter assembled profile tolerances, virtually eliminating the need of “nibbling” – which creates an inconsistent step pattern.
- Adhering to a 4 or 4.33 CPM rate of change cannot apply to all shafts, as different manufacturers have different intents. True Frequency Technology® when combined with my True Length Technology® ‘TLT tipping increment’ allows a constant butt to last step pattern, keeping a consistent parallel length in the butt end diameter. This keeps balance points in line relative to each other, eliminating the randomness of a “nibbled” set.
- Now that the shafts have been sorted, stabilized, and individually assigned to a club head, the tipping increment can be decided without the need of “nibbling”. I do suggest following the ‘TLT tipping increment guide’ (Registered TLT Clubmakers have this data) of progressive tip cutting – allowing a constant ‘butt to last step’ pattern.
A perfect slope or curve is simply not attainable – by any system, but a decent rate of change or curve with minor fluctuations is real world. Keep in mind that most golfers have a tough time detecting 1/3rd of a flex (3 CPM), where True Frequency Technology® should keep you well within this limit. Remember, I am talking total beam length profiling, incorporating butt, mid, and tip sections (not just butt frequencies). The final True Frequency Technology® slope or curve is a key factor in driving consistency into your complete set.
A perfect slope or curve by any system is simply not attainable and is an unrealistic goal. Deviation will always exist, be it in your ability to measure or their ability to manufacture (and a combination of both). Fluctuations will exist, so keep your expectation realistic. True Frequency Technology® will allow for a far greater amount of consistency to be built into your set.
Raw stage sorting through True Frequency Technology® will simplify your high end build efforts and drastically improve the end result, feel and consistency for your player.
Here is the TFT Classification chart
Class A – a very good set of raw shafts
Class E – a poor set of raw shafts that will still work well once the TFT sort is complete.
The ‘Shaft – Beam 0, -5, -10, -15, -20‘ lengths above indicate how much the total length was reduced for each measurement – (shaft profiling)
So if the raw shaft was 40″
Beam 0 – has 5″ clamped and 35″ being measured
Beam -5 – has been reduced 5″ and has a beam length of 30″ being measured
Beam -10 – has been reduced another 5″ and has a beam length of 25″ being measured
Beam -15 – has been reduced another 5″ and has a beam length of 20″ being measured
Beam -20 – has been reduced another 5″ and has a beam length of 15″ being measured
Shown below are 2 sets of raw iron shafts from 2 very reputable suppliers and are both premium level shafts
Set 1: Class E set of shafts – poor consistency with too much variation. If this set was built without a True Frequency Technology sort (shafts randomly assigned to club heads) the set would not perform with any form of consistency.
Left side is the RAW data Right side is SORTED data.
Large variation – Class E set through the use of the TFT sort engine
11 CPM range in the butt section Beam 0
15.5 CPM range in the -5 beam
31.5 CPM range in the -10 beam
86 CPM range near the tip section (Beam -15)
The vertical column is cycles per minute and the horizontal row is each individual shaft A – G.
Here is the TFT graphical representation for the above Class E set of raw shafts.
Note the lack of consistency in the cycles per minute (columns) and the excessive ‘Range’ with high ‘Min’ and ‘Max’ values. A very poor set of shafts that would result in a very inconsistent set if built randomly.
If this set of shafts were not sorted – shaft A (weakest) could be in your 7 iron and shaft G (stiffest) could end up in your 8 iron. These 2 clubs would perform and feel quite different from each other and would result in a poor frequency profile build with grave play-ability issues.
By running this set of shafts through the TFT sort engine and installing the weakest shaft in the longest iron (shaft A) and the stiffest shaft in the shortest iron (shaft G), then this set of shafts have now become far more consistent than what they would have been if installed in a random order. After the sort this set will play with a decent amount of consistency. The 6 iron shaft is softer in the tip resulting in an increased launch angle. The sand wedge has a stiffer tip section promoting a lower ball flight for the short iron. You have increased the value of your shafts and optimized them for play-ability.
Set 2: Class A set of shafts – with very good consistency – will result in a very consistent build and is now ready for a high end build.
Note the consistency in the cycles per minute (columns) and the greatly reduced ‘Range’ with a very tight ‘Min’ and ‘Max’ values. A very good set of shafts for a premium build.
Note the near flat line cycles per minute – indicating very little variation – shaft to shaft. This is a great set of raw shafts.
This is a set of shafts you want for your premium build or for anyone looking for a very tight frequency through shaft profiling.
Note the range of this Class A set of shafts
Small variation – Class A set through the use of the TFT sort engine
2 CPM range in the butt section Beam 0
3 CPM range in the -5 beam
6 CPM range in the -10 beam
10 CPM range near the tip section (Beam -15)
The TFT sort engine has far exceeded any butt frequency sort and has established a perfect base line for your premium level build with unparalleled consistency.
So I believe you can see the value in the True Frequency Technology sort engine.