Golf Club Loft – Will The Real Loft Please Stand Up
One of the most important specifications on each of your golf clubs is the loft angle. To skip the fancy definitions, the loft angle is simply how much the face of the clubhead on each of your golf clubs is angled back. Every clubhead in your bag has a specific and different loft angle on the face, even your putter.
Quite simply, loft is about 85% of the reason you hit each golf club a different distance. The length of each of your clubs comprises the other 15%. How far YOU actually hit each club is mainly a product of the relationship of YOUR swing speed with the different loft on each clubhead in your set – with a couple of other technical things tossed in called angle of attack, point of impact on the face, and dynamic loft at impact due to forward shaft bending and hand/release position at impact.
One of the several definitions of a perfect set of golf clubs is that each club hits the ball a specific, different distance and that the difference in distance between each club in progression through the set is as close to the same as possible. Many of you know how frustrating it can be to play when you have two adjacent clubs that have a 20 yard distance difference between them and yet two others for which you only see about a 5 yard gap in distance between.
When you see discrepancies in the distance gap between clubs, the first and usually the main reason this happens is because the lofts are not consistently spaced between all the clubs. Yes, there are other equipment reasons this can happen such as length errors or things associated with how much each club weighs in relation to the others. There are also golfer reasons such as changes in ball position and differences in angle of attack with the different clubs. But speaking about the equipment side of this, day in and day out when you see inconsistent distances between clubs it is because there is an error in the spacing of the loft angle(s) between the clubs.
No clubhead manufactured in the golf industry is perfect to all of its intended design specifications because in an industry that manufactures tens of millions of golf clubs every year, that is quite impossible to achieve. All specifications of clubheads are subject to normal +/- tolerances. For loft no clubhead production factory on the planet will quote a +/- tolerance for loft that is tighter than +/-1*.
In addition there is a difference between quoted tolerance and delivered tolerance in the production of clubheads. While most every clubhead factory quotes a +/-1* tolerance for loft, the actual delivered tolerance will vary tremendously in the clubhead production industry. Having designed over 350 different clubhead model designs in my career that were produced and sold, believe me I can speak with more experience than just about any other person in the history of the game about clubhead production tolerances!!
For example, in a run of 100 clubheads made by a very good quality factory, approximately half will be dead on the loft spec. A third will be between 0.1* to 0.5* off from the loft spec and the rest will be between 0.6* and 1* off from the spec. Not more than one out of every 200-300 will be more than 1* off from the spec. But with a not so good clubhead production factory less than ¼ will be dead on spec, over a third will be >1* off from the spec and about one of every 50 will be 2* or more off from the spec. The old adage of “you get what you pay for” tends to be very accurate in judging production tolerance quality in the clubhead manufacturing business.
So how DO you know what the lofts are on your clubs? Sorry but you can’t use a simple protractor to measure the loft on your clubs. It takes a special gauge that club designers, clubhead production factories and custom clubmakers use in their work. The image shows the machine that has been considered the industry gold standard (actually, ‘green’ standard since the machine has never been made in any other color!) for clubhead specs measurement in the golf equipment industry.
While you can go to a the website of the company that makes the clubs you play and probably find a chart that tells you the loft on each head in your set, thanks to the fact there are definitely plus and minus tolerances, that doesn’t tell you exactly what the lofts on your clubs are.
Add a really tricky thing to that as well. Ever since the introduction of the modern adjustable hosel sleeve on drivers and some fairway woods, what loft you actually play with can be very confusing. ONLY if the driver is manually held in a 0* square face position behind the ball will the hosel sleeves deliver the loft stated on the sleeve position. Very few of the companies actually state that, which has always been a head scratcher to me. Not only that, forgetting the sleeve or having to hold the head in a square position at address, the head itself is still subject to the normal +/-1* error tolerance in its manufacture.
With the irons where a specific distance for each iron is a very important part of the game, the +/- tolerance in the production of the heads accounts for most situations where the golfer notices a shorter distance gap between two irons and a larger one between two others. Bottom line, when inconsistent distance gaps are present between your clubs, consult an experienced custom Clubmaker for help. Most irons can be bent for loft and lie adjustments so the distance gaps can be more consistent.
The perfect solution that takes everything that affects distance gaps into consideration? Going through a ‘gapping’ test with a very accurate launch monitor not only accounts for actual loft errors but uncovers swing differences from club to club that can cause odd distance gaps. Such a test involves hitting every club and noting the carry distance of perfectly on center hit shots. The good shot distances are noted for each club and from that loft adjustments on the irons at least can be made. Loft changes on fairway woods or hybrids unfortunately cannot be done so if you need a new loft on a wood or hybrid you’ll have to buy a different clubhead with the proper loft.
Tom
[…] to Wishon Golf Fitters, your loft is 85% of the reason that you hit each club in your bag a different distance. They also […]
Hi Tom, I have a set of 870 Ti irons. What I have found is that I get good distance out of the longer irons, particularly the five iron, but my numbers really bunch up at the other end with the short irons coming up short distance wise. I have fairly smooth swing and I’m into my fifties now, would you put this down to lack of speed?
EWAN Most golfers with a normal to below avg clubhead speed find that the distance gap between the lower loft irons is more compressed and smaller than the distance gap between the higher loft irons. This is because to get full distance off lower loft irons requires a higher launch angle and higher trajectory, something that is very hard to do for avg speed players with lofts under 30*. The only things I can think of with the short irons as you report your situation might be, 1) have the lofts checked by someone who truly knows how to do… Read more »
Thanks for the advice and sorry for taking two years to respond! I’ve recently started playing my 870s again after trying and failing to get on with a modern set with ridiculously strong lofts. Anyway, I’ve now re-gripped the 870s with some heavy (65g) midsize grips and started playing the ball further back in my stance as you suggested. Clubhead delivery is now a lot more solid/reliable, which in turn seems to have fixed the gapping problem with the short irons. Thanks again.
EWAN
Good to hear that things are working a little better. It was really nice to be reminded of the old 870Ti irons too!! I still think there are two super game improvement irons that are my all time favorites and the 870s are one of those. Wish I had kept a set for posterity sake!!
TOM
Just to go back to the heavier grips I mentioned earlier. The new grips I’ve added are 66 grams; the old ones were 53.5 grams. The heavy grips seem to stop me from getting the club stuck on the inside, but the question is, have I messed up the MOI? And will the shaft flex now be significantly weaker/softer? I did think that the change would have me flipping and releasing the club even earlier but if anything the opposite appears to be the case. Thanks, Ewan
Ewan Increasing weight at the butt end of the club has the least effect on the MOI of the golf club because all that grip weight increase is closest to where the axis of rotation is for the measurement of the MOI. For each increase in grip weight of 10g, the MOI increases by 3 g-cm2. So with the change from 53.5 to 66g the MOI increases by right around 4 g-cm2, which is insignificant. Changes in the MOI of 20 or more begin to change the swing feel of the club. But you also have the matter of the… Read more »
Clubs can be fit to compensate a golfers swing or swing flaws such upright lie angles for steep swing plane. Would flatter lie angle help trigger this same golfer to flatten his/her swing plane for a more efficient swing possibly eliminating an over the top / out to in downswing?
KENT It is possible for a golfer to let the way the clubs sit in the address position push the golfer into a different swing plane or different takeaway. The golfer has to consciously do this in the beginning with the adjusted clubs to get his swing change started. And then with discipline over time it is possible that the swing motion forced by the club change can stick. A flatter lie can certainly force the swing plane to be flatter, but there is no guarantee that it will also reduce the over the top outside in path problem. What… Read more »
Thanks for the response. Std.length upright lie looks and feels that I’m standing too erect. At age 52, turning on tightly stacked hips and back is becoming harder to do. I find that fitters will adjust lie angle but are reluctant to shorten club length. At 5’11 (closer to 6′ with golf shoes), my static fit specs indicate “standard” length clubs and dynamic swing requires 3* upright lie. Unless I’m practicing almost daily, I find that I make better contact by gripping down 1/2+” with the same lie angle. Should I ignore my fitter advice or get another fitter for… Read more »
KENT If there is another fitter who has a decent reputation for knowledge and experience, by all means you should consult to listen to a 2nd opinion. There are no “quality standards” for fitting knowledge because clubfitting has always been mostly a self taught “cottage industry.” In short there is a wide range in knowledge and expertise among fitters and always has been. One reason some fitters are reluctant to change length is because it is difficult to re swingweight the clubs after the length change. Sometimes the usual methods of a weight bore in the head or tip weight… Read more »
You mentioned that a protractor cannot be used to measure loft of a given head. That special equipment is used by the manufacturer. Can you go into detail how the manufacturer measures their loft and given that using a protractor and understanding that because of the cupped face of a (driver face) it would be different from top to bottom; how much difference would there be? Also, using a protractor (or similar device) measuring one head i.e. stamped with a 9.5 degree loft and another stamped stamped with 9.5 and comparing the measurements obtained with the protractor (in the middle… Read more »
Caleb: What I mean is that you cannot hold the clubhead in your hands and use a protractor to measure the loft. You must secure the clubhead in a special device and position it correctly before you then could use a special type of protractor to measure the loft. The video at this following you tube link can show you a little bit about the type of machine and how heads have to be fixtured in order to perform accurate spec measurements. https://www.youtube.com/watch?v=2VexY0XJ-J4 Up until three years ago, all the manufacturers measured the loft of drivers/woods/hybrids the same way. But… Read more »
Big help and great information. Thanks very much… What part of the country do you live? Love to go through a fitting with you at some point down the road. Thanks JA
JOHN Our company headquarters are in Durango, Colorado in the southwest corner of Colorado. We do offer fitting analysis by appointment at our R&D facility that we chiefly use for our clubhead and shaft design engineering and testing work for developing the designs for our company to offer to custom clubmakers all around the US and internationally as well. Our R&D center is on the driving range at the Dalton Ranch GC just north of Durango and when people do wish us to fit them, we can offer that service from late March through early November. Fitting appointments can be… Read more »
Tom,
I am the Golf Professional at Allegheny Country Club in Pittsburgh. I have played in a few PGA Championships and many other tournaments but I am always searching for the perfect clubs. I am 5’7″ and just recently I cut down all my clubs. Driver to 43 inches 5 iron is 37 inches. 3 hybrid 38 inches 2 hybrids 38.5 inches. I would love to hear your thoughts on club lengths… Thanks
JOHN: I’ve written and communicated a lot in my career, in books/articles/videos, to share everything I have learned in my long career about club design, performance and fitting technology with anyone who is interested in knowing the facts and truths. A big area has been with regard to club length because it is such an important fitting parameter for trying to achieve the highest level of shot consistency, path/angle of attack and release consistency, and to help a golfer get the most from his/her game. I am a very outspoken critic of the OEM’s trend over the past 30 yrs… Read more »
It’s very interesting but quite confusing thinking of 15% shaft length and 85% loft that make an iron distance gaps. Actually I was thinking to covert one of my 8 iron into 9 iron by shortening the length only since I love the head shape of 8 iron much better than 9 iron. I was just roughly thinking of cutting off 1 inch without changing loft. Do you think this makes any sense? For your info, my handy cap is 9 and I hit 8 iron 140 yards and I expect the cut off 8 iron to be 125-130 yards… Read more »
Tom, If you use a set of irons that are the same length and the head is the same weight, though you may lose some distance, wouldn’t the gapping between clubs still be consistent? and since many of us have a hard time hitting the lower irons, in theory, if all our clubs are the same length and we have a comfortable swing, it seems like it could lead to a more consistent swing. I guess what I am trying to ask is if you think the problem a lot of us have with lower irons is because of the… Read more »
Daniel: Thanks very much for YOUR interest in equipment, and we are always glad to help with the best information we can. Whether a conventional 4* change in loft between irons that would be made to the same length can offer consistent distance gaps depends on the golfer’s clubhead speed and their point of wrist-cock release on the downswing. Those are the two elements that combine to determine whether a golfer gets measurably different clubhead speeds from different club lengths. The later the release and the higher the clubhead speed with it, the more a golfer would see changes in… Read more »
Tom, I always enjoy your interviews on golfsmarter. I was hoping you might be able to answer a questions for me. Since, you said that the distance is 85% from the loft. Do you think a company like 1 iron golf could be on to something. If all irons were on length and had the same club head weight, and you would use the same swing. Couldn’t that be a beneficial thing? I know that the Tommy Armour ones didn’t take off, but they modeled them after a 6 iron, where 1 iron golf base it on your size, so… Read more »
DANIEL: We’ve certainly looked at the concept of single length irons so we do know a fair bit about its potential strengths and weaknesses. But I think probably the most compelling history about this concept comes from back in the 90s when the former Tommy Armour Golf Company actually did market and sell a set they called the EQL. In the EQL, all woods were the same length, totalweight and swingweight as the 5 wood. In the irons, all irons were the same length, total weight and swingweight of the 6 iron. The EQL clubs debuted with great interest. At… Read more »
Great information about Golf Club Loft – Will The Real Loft Please Stand Up. It’s great to come across a blog every once in a while that isn’t the same out of date rehashed information. Although it took me time to read through all the comments, but I really enjoyed the article. Keep up the good work.
Much appreciated, and thank YOU for your interest in golf equipment performance and fitting. Because there is and has been so much bad information passed around about golf club performance, we do make a real effort to share what we know from all the experience we have in club design and the research we have done in clubfitting performance. Thanks much for being interested and letting us know it matters.
TOM