In element II I will cross over the FAQ?S concerned with ?MOI Balance Index? Frequently known as ?Balancing? Clubs.
What is MOI Balance Index?
MOI Balance Index means that the clubs are MOI matched *AND* the static weight of the additives of the club (shaft, grip and head) are in the identical share. The concept of MBI was advanced with the aid of an engineer named Monte Doherty. He created an intensive Microsoft Excel spreadsheet to assist decide MBI. It no longer most effective accounted for the weight of the components, however the Center of Gravity of each element.
Have you ever heard of the ?Balance factor? Of a shaft? If so, Doherty?S spreadsheet bills for the balance factor of the shaft as well as the stability point of the grip and the form of head (driver, fairway wooden, hybrid, muscleback iron, participant?S hollow space lower back iron and Game Improvement iron). Between that and the weights of the additives, he created a MOI Balance Index number. The variety stages from zero-a hundred. In reality, the variety will variety extra from 30-70.
I don?T apprehend what you mean by way of ?Weight of the additives being within the equal percentage. Can you explain?
Sure.
Here?S a desk of the burden of the additives of a fixed of irons that are swingweight matched.
What many golfers don?T recognise is two matters:
1. Head weights receives progressively heavier as the club has extra loft.
2. Shaft weights (trimmed) get steadily lighter because the club gets shorter
Clubs were designed this manner when you consider that the beginning of swingweight. When you trim a shaft, the shaft?S static weight becomes lighter (much less shaft = less weight). So which will counter the ones shafts getting lighter, OEM?S make the heads heavier as the membership gets shorter.
However, that reasons the share of the burden of the clubs to alternate. When we take the shaft grip weight and divide that via the top weight, we see dramatic variations. The three-iron percent is at sixty five.1% and the Pitching Wedge percent is at fifty one.1%.
So, with ?Balancing a set of clubs?, the percentage would be kind of the equal. Let?S say we wanted to suit everything to our 6-iron (58.5%), the desk could appearance something like this:
Why is Balancing the set essential?
It?S virtually no longer obligatory to balance a hard and fast of golf equipment. However, the main advantages are launch and ball flight. Provided that you are outfitted for Balancing a fixed of golf equipment, the attention of the club?S mass will be more or less the same.
In this set that became no longer balanced:
We have a 3-iron where there may be a higher awareness of the club?S mass within the shaft (65.1%) than with the Pitching Wedge wherein the attention of mass is more toward the pinnacle.
Now, permit?S move again to our example in which we need to apply the 6-iron?S Balance Percentage (fifty eight.Five%).
The 3-iron (sixty five.1%) could have a better awareness of its mass in the shaft. That will produce a decrease release and spin than the golfer is geared up for. And the issue with the 3-iron is that it already has a low loft and does no longer need to release lower.
Conversely, the pitching wedge (51.1%) could have a better awareness of its mass within the head. This will produce a better release and better spin. But, the membership already has sufficient loft to supply that.
To counter their clubs being un-balanced, golfers (even Tour gamers) will often regulate their swing mechanics to get the lengthy irons up in the air and their shorter irons to have a more penetrating ball flight. With Balanced clubs, that calls for much less of that changing of swing mechanics to supply your preferred ball flight.
Do we Balance all the golf equipment or just the irons?
Each membership may be set to the equal percentage, from the Driver to the Lob Wedge. In truth, I experience that the largest gain of Balancing the golf equipment is with the motive force because that is the membership wherein launch, max peak and spin fee is the maximum critical.
Do I have to use Doherty?S spreadsheet to Balance my golf equipment?
No.
I find that as long as the clubs are MOI matched you can simply figure out what your target % is and then derive how much the shaft + grip should weigh. You may be off a little, but we have a margin of error of +/- 2%. Doherty's spreadsheet helps account for more finite details like the Center of Gravity of the components.
Won?T this make the clubs exquisite heavy if each the shafts and head ascend in weight?
No.
If we harken back to our discussion on MOI matching; if we match our MOI in our irons and then measure the swingweight, the swingweight will increase as the club gets shorter. So if one were to use the swingweight method with balancing their clubs, they would find that the swingweight gradually increases. But since swingweight does not accurately depict heft, the heft of the club would not change if clubs are balanced properly and the MOI matches.
So how does one get ascending shaft weights considering shafts get lighter as you trim them shorter?
First, we are starting to see to peer foremost shaft corporations addressing this problem with gadget. Nippon shafts have made ?Constant weighted? Shafts wherein the shafts remain the equal weight after they may be trimmed (margin of mistakes of /- 1 gram). Furthermore, Aerotech has created a version of shafts known as the Player Spec and UST has created the Recoil version of shafts that ascend in weight. I consider that we are able to start to see more and more companies pass on this course.
However, there are more than one approaches to do that.
For starters, you will need access to Wishon’s Bend Profile software. If you’re being fitted with a 6-iron, which I recommend, it’s likely that the shaft fitted for the 6-iron will be too heavy in the 3 & 4-irons. If so, you will need to find a shaft with a similar bend profile that is lighter in weight to install into those clubs.
From the clubs that require heavier shafts, there are a couple of options.
For starters, one could go into the Bend Profile software and look for heavier shafts with similar bend profiles.
The other part is to add weight to the shaft. Either via a counterweight, an internal shaft weight like the Tour Lock Opti-Vibe or using lead tape to place on the shaft.
Chances are you will likely need to do this with the shorter irons because if the irons are going to ascend in weight you will probably not find a heavier shaft that is heavy enough. For instance, I’ve taken 133 gram wedge shafts that weight 108 grams when trimmed to SW length. And if the SW shaft needs to be 120 grams, then you have a problem.
The best method is to add weight to the shaft, either thru lead tape, a counterweight or the Tour Lock Opti-Vibe.
Do we have to measure the weight of the ferrule, epoxy, grip tape, etc?
For most accurate measuring, yes.
The ferrule will weigh about 1.0 to 1.5 grams. The epoxy weighs about 0.3 grams. Grip tape will measure about 1 gram per wrap. So if you put 2 wraps of tape, it will weigh roughly 2 grams. With the epoxy and ferrule, we just count that as part of the head's weight. The grip tape would count as part of the grip's weight.
How does adding weight to the shaft affect the club's MOI?
It depends on where the weight is added. The closer down the head, the more it adds to MOI. General rule of thumb is:
1-gram on balance point of shaft = 5 MOI points
1-gram near shaft label (below grip) = 2-3 MOI points
1-gram on butt-end of shaft = 0 MOI points
So, how does using a counterweight work?
Since the counterweight is on the butt end of the grip, it will have little affect on MOI. IIRC, 1-gram of weight on the butt end of shaft equals about 1/400th of a MOI point.
Tour Lock makes a counterweight called the 'Tour Lock Pro Counterweight.'
They also make a product called the 'Opti-Vibe.'
The Opti-Vibe is *not* a counterweight.
It is called an 'internal shaft weight.' It is a weighting product that the installer can put into the shaft thru the butt end and then move the weight up and down the shaft depending on how much MOI they want to add. The further down the shaft they move the Opti-Vibe, the more MOI it adds to the club.
Here's a demonstration:
3JACK
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