Shaft Frequency Analyser in action at GolfStix

“Frequency matching” is a scientific method of providing the correct
flex for each club in a golfer’s bag. Major brand manufacturers rely on
“flex” which is usually marked as S, R, L (stiff, regular, lady] on the shaft
… which unfortunately has absolutely no meaning whatsoever as there
is no consistency in the markings. For example, some manufacturers
put “S” on a shaft just to appease egos, when in reality it should be
marked “L”.
True professional club fitters and master club builders at GOLFSTIX
understand the importance of “frequency matching”. To find any shaft’s
true frequency, the shaft is placed in a clamp with the club head 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) by a
frequency analyser. The faster the shaft oscillates the stiffer the shaft is.
Shaft Frequency Analyser in action at GolfStix
Reference: Excerpts of this article adapted from
Generally, a matched set of irons will have a difference of 4 cpm’s for
every half-inch difference in the length of the shaft. For example, if a 6
iron is at 300 cpm’s the 7 iron should be at 304 cpm’s. Also it should be
noted that there are 12 cpm’s between flexes, meaning that a shaft
measuring 300 cpm’s is one full flex softer than a shaft measuring 312
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. It is not uncommon to see three different flexes in
a, supposedly, matched set of golf clubs, regardless of whether they
have been fit to the golfer or not. This creates more inconsistency in a
golfer’s game and they usually find that they have golf clubs in their bag
that they have trouble hitting.
The build of your set of clubs is just as important as the fit. Just ask any
Tour player. At GOLFSTIX, we only use parallel tipped shafts that are
designed so that a club builder can perfectly match your set of golf clubs
to a tolerance of +/-1cpm. By trimming off the tip end of the shaft, (club
head end) we 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 then cut to length. (at the grip end) These are difficult if not
impossible to match perfectly.
When you buy a set of golf clubs from GOLFSTIX, you can be assured
that not only have you been fit correctly but your golf clubs have also
been built to the very tightest tolerances in the industry. Each club in
your bag will then “feel” and perform the same … no need to contort
your swing to suit your clubs!

Reference: Excerpts of this article adapted from